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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine

Post  KariFS Sun May 03, 2015 1:48 pm

StevenStanleyBayes wrote:
Surfer_kris wrote:Steven hasn't yet understood how the diesel head works. This is also evident in the very loooong description he wrote for the engine/generator. I have pointed that out a long time ago but he doesn't seem interested in reading up on basic engineering stuff.


BTW, ALL TOPICS, AS FAR AS I REMEMBER : YOU HAVE BEEN WRONG ON EVERY SINGLE TOPIC DISCUSSED EXCEPT PROVIDING INFORMATION WHERE TO PURCHASE WHAT OR VERY GENERAL THINGS AS : THIS IS AN ENGINE WHICH IS OBVIOUS.

However, information where to get what is very important and, as posted, I have been very greatful to all.

Again : go get a thick circle from a garage, as explained, start your engine than talk.

Holy Cow!

After a statement like that one above, Kris and everyone else is certainly going to bend over backwards to help you with all your needs. Or mebbe not.
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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Appologies

Post  StevenStanleyBayes Sun May 03, 2015 1:51 pm

I went nuts. Sorry. Too many problems.

Chris said how to insert the crankshaft. I forgot. Thanks. I have also said I have been stupid not to think this over.

I also realised what probably robot797 wanted to say.

Probably, robot797 wanted to suggest an idea for an improved compression control by a hole in the gasket covered by the counter piston. This is a good idea.

I also forgot to mention the counter puston moves from left to roght and cannot fully ensure a central press. The movement is not big but still, there is. Thus a dome up gasket cannot ensure a central press nor can a metal one. This is also why Cox install them dome down.

Also, the reduced chamber may help start the engine more easily although I have started the engine with a dome up gasket easily too.

However, I consider I have made a mistake installing the gasket dome up to be protected from the piston and I will not do this anymore.
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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine

Post  robot797 Sun May 03, 2015 1:57 pm

i have never talked about a hole being posetive
dont turn my words the wrong way

i may be dutch but the things i say do make sense
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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine

Post  StevenStanleyBayes Sun May 03, 2015 2:02 pm

KariFS wrote:
StevenStanleyBayes wrote:
Surfer_kris wrote:Steven hasn't yet understood how the diesel head works. This is also evident in the very loooong description he wrote for the engine/generator. I have pointed that out a long time ago but he doesn't seem interested in reading up on basic engineering stuff.

BTW, ALL TOPICS, AS FAR AS I REMEMBER : YOU HAVE BEEN WRONG ON EVERY SINGLE TOPIC DISCUSSED EXCEPT PROVIDING INFORMATION WHERE TO PURCHASE WHAT OR VERY GENERAL THINGS AS : THIS IS AN ENGINE WHICH IS OBVIOUS.

However, information where to get what is very important and, as posted, I have been very greatful to all.

Again : go get a thick circle from a garage, as explained, start your engine than talk.

Holy sh1t.

After a statement like that one above, Kris and everyone else is certainly going to bend over backwards to help you with all your needs. Or mebbe not.



I have already appologised and I appologise again. Please note I have spent 7 hours typing on a cellvphone yesterday and now and another 5 hours on Friday.

I am sorry. I am going crazy.

From now on, I will mainly use a PC for not more than 30 minutes in the evening, usually 15.

Sorry. I am out untill any of the coming evenings.

This is not an excuse but, please, try to understand what typing on a cell phone for 12 hours out of 60 is. 20% on a cell phone on the forum.
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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine

Post  StevenStanleyBayes Sun May 03, 2015 2:06 pm

robot797 wrote:i have never talked about a hole being posetive
dont turn my words the wrong way

i may be dutch but the things i say do make sense


Then I do not know where this hole in the gasket in the middle cane from. Maybe I have misunderstood something.

Regardless who said what, I think the hole idea is excellent. Do not take this wrong. I did not invent this. I rwad or misread something, so I do not still the idea, I did not come up with this idea but I like the idea a lot.
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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Forum Hours

Post  StevenStanleyBayes Sun May 03, 2015 2:10 pm

In order to reduce the hours I spent on the forum as well as to keep sanity, I am out until one of the next evenings. I do not know when.

Help is voluntary and I DO APPRECIATE every single help from anyone I have ever received and I have received a lot. Thank you all.

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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine

Post  Cribbs74 Sun May 03, 2015 2:29 pm

It's an interesting topic.

Probably best to take a break for a couple days and revisit.

I know Admin already dropped the hammer, but I would like to add that folks need to also refrain from profanity (in any form) It's against the forum rules.

Ron

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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine

Post  StevenStanleyBayes Mon May 04, 2015 11:00 pm

Cribbs74 wrote:It's an interesting topic.

Probably best to take a break for a couple days and revisit.

I know Admin already dropped the hammer, but I would like to add that folks need to also refrain from profanity (in any form) It's against the forum rules.

Ron



Your advise is appreciated. I am much better after a break. As mentioned, I would not spend more than 30 minutes per log in and mainly on PC and not on cell phone. The targeted log in period is 15 minutes. 30 minutes is the maximal. Hope I manage to do this.
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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Fixing a Broken Crankshaft ?

Post  StevenStanleyBayes Mon May 04, 2015 11:01 pm

Because Cox International is temporarily out of stock of their diesel crankshaft awaiting a new order, I have ordered a Davis Diesel crankshaft. Here are the concerns with the Davies Diesel crankshaft :

I have not yet received the Davis Diesel crankshaft and I have only seen pictures thereof. From what I have seen of the pictures, I have these concerns with the Davis Diesel crankshaft :
1. The crankshaft eccentric ( the flywheel ) looks narrower than the original Cox crankshaft. I wander whether the Davis Diesel crankshaft can generate the same suction as the original Cox crankshaft.
2. The axel of the Davis Diesel crankshaft lacks the middle narrowing which the original Cox crankshaft has. I wonder I wander whether the Davis Diesel crankshaft axel can be oiled enough.
3. The crankshaft eccentric ( the flywheel ) looks narrower than the original Cox crankshaft. I wander whether the Davis Diesel crankshaft can have the same inertia ( momentum ) as the original Cox crankshaft.

How to repair a broken crankshaft pin :

DISCLAIMER : THIS HAS NOT BEEN DONE BUT IS A STANDARD, NON ENGINE GLOBAL PROCEDURE DONE IN MANY INDUSTRIES AND PLACES AND, THUS, SHOULD WORK.

The idea is to place a specially made screw in lieu of the broken crankshaft pin. The most important rule is to make such a thread, so when the engine works, i. e. when the piston drives the crankshaft, the screw gets tightened by the friction between the screw and the piston rod to crankshaft pin assembly.

When one looks at the working engine, started with a right hand spring starter, the engine rotates counter clockwise. Thus, looked from the pilot’s seat, the engine rotates clockwise. This means, during the working and exhaust cycle, when the piston drives the crankshaft, the piston will exert friction which will act counter clockwise. This means the thread must be left thread, opposite of the normal thread to ensure tightening. During the compression and loading cycle, when the shaft drives the piston, the friction will be of the opposite direction. The force during the working and exhaust cycle is stronger, therefore, an opposite thread is needed. The same direction apply during start up but the force of the compression and loading cycle is greater yet not as high as the force during the working and exhaust cycle.

1. Thread must be made at the same point where the old pin has been. This can be made with a watch repairer set.
2. A screw must be found or cut to match the thread and the direction of the thread. The screw must have a non threaded portion which will be the only visible portion after installation. The head can be cut and a tiny slot for a normal screwdriver can be cut in the middle. Alternatively, a round head Allan key screw with smooth head with the same length as the pin can be used. Obviously, the diameter of the screw or the head must be the same as the pin.
3. Micro welding of the screwed in screw with a laser or a micro plasma welder is welcome.
4. High temperature Lock Tight ( the super strong one ) is welcome.
5. Strength depends on materials and thermal processing.

This may or may not be possible to be made by a general person. Very fine thread maker is needed. Very high accuracy in making the thread perpendicular to the crankshaft eccentric ( flywheel ) is needed. Finding such a screw may be next to impossible : remember : the diameter must exactly match the diameter of the pin.

The best people to do this job are watch repairers. They also have the tools and headless screws, hopefully, with a flat section.
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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Status Report : Storage of Ether

Post  StevenStanleyBayes Wed May 06, 2015 4:59 pm

Got a jar with a lock and a long glass. Hope to be able to store Ether in the jar. Hope the jar is air tight. Hope the Ether does not evapourate.

The Internet says :

1. Ether must not be sprayed from a spray can into a container but, instead, the can must be punched at the bottom while upside down and propellants musy be waited to escape. The remaining is almost pure Ether not mixed with propellants unlike when sprayed.

2. Once the Ether is poured into a non plastic container, the container must be kept open for a few minutes for any leftover propellants to evapourate.

3. Ether must not touch plastics.

4. The container must be kept in a freezer to even more prevent Ether evapouration.

Jar and stainless steel canisters, jars, thermos, etcetera are welcome and no plastic containers of any kind.

Rubber gaskets cannot be avoided. Must be air tight.

Glass syringes must be used and not plastic.

Only specialised neupren fuel lines must be used although the automotive stores sell specialised Silicone hoses and lines which withstand all fuels.

I have also found poured Ether to be better, start easier and burn easier as well as give more power than the squeezed one. Air tight storage, however, is imperative.

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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine

Post  ian1954 Thu May 07, 2015 9:49 am

You would not normally use any "screw" fitting for the crankshaft pin. It is far quicker and simpler to use a rod (usually a drill rod) of the correct size and drill and ream a hole to produce a very tight press fit.

Crankshafts are not comparable by sight. The strength of these depends on the steel used and the degree of tempering employed.

The Davis crankshafts I have are made from a chrome steel alloy. I am not sure that the lack of narrowing of the middle of the shaft would make any difference to lubrication. The Cox crankcases usually carry a groove for lubrication. The narrowing may have been done to reduce the friction of the bearing area but, then again, the reduced area could induce wear leading to the crankshaft wobbling.

The standard Cox crankshaft seems to be made from a free machining carbon steel that has been ground, polished and heat treated.

Often the pin breaking is not through the weakness of the material but because of flooding and/or the ball and socket joint in the piston loosening and creating a hammering action.
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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine

Post  StevenStanleyBayes Fri May 08, 2015 11:59 am

ian1954 wrote:You would not normally use any "screw" fitting for the crankshaft pin. It is far quicker and simpler to use a rod (usually a drill rod) of the correct size and drill and ream a hole to produce a very tight press fit.

Crankshafts are not comparable by sight. The strength of these depends on the steel used and the degree of tempering employed.

The Davis crankshafts I have are made from a chrome steel alloy.  I am not sure that the lack of narrowing of the middle of the shaft would make any difference to lubrication. The Cox crankcases usually carry a groove for lubrication. The narrowing may have been done to reduce the friction of the bearing area  but, then again, the reduced area could induce wear leading to the crankshaft  wobbling.

The standard Cox crankshaft seems to be made from a free machining carbon steel that has been ground, polished and heat treated.

Often the pin breaking is not through the weakness of the material but because of flooding and/or the ball and socket joint in the piston loosening and creating a hammering action.  


This is very good information, thank you.

A rod would be OK as long as the rod can be stable and not move. A screw would be much more stable. Rod or screw with micro welding and high temperature Lock Tight ( in case such is available to withstand the working temperatures ) is even better. Thus, in case there is a way to weld the rod with micro welding, this would be very stable. Tempering can be carried out thereafter to either harden or soften the assembly. The welding point may have different qualities, depending on the tempering after welding.

Micro welders are either plasma or laser welder which pin point the weld spot with lower than a millimetre precision. They look like a pen or a pencil and are very easy to work with. May still be expensive though.

Every person on the internet swears by the Davis crankshaft, therefore, they must be very good. Steel Alloys are better than steel. Hopefully, the Chromed steel used does not rust unlike the simple steel.

When the engine rotates, a tiny part of the fuel, containing oil, goes between the crankshaft axel and the housing. The narrowing acts like a buffer, a fluid capacitor, which stores more oil in between the narrowings as well as creates a lower resistance towards the coming oil into the axel and axel housing. Thus, the engine would be always oiled well and more oil would come into at the expense of fuel loss which is negligible. In case Davis Diesel crankshaft allows for a good clearance between the axel and the housing, then the axel will be oiled OK and the only difference is the lack of storage of oil to be used whenever needed and whenever the crankcase cannot pump fuel into the axel and axel housing.

Because many people on the Internet are extremely happy with the Davis Diesel crankshaft, maybe, the clearance is good enough and the oiling is good enough.

True, the friction of the Cox crankshaft is concentrated on the two wider points but these are very long to create any significant damage. True, the Davis Diesel crankshaft spreads the force throughout the whole axel but this may also mean more friction.

However, the main concern with the Davis Diesel crankshaft I have is whether the crankshaft can generate a good suction which is the most important consideration for this design. The Cox crankshaft generated such a wonderful suction, I was able to start the engine in less than 10 seconds, just 2 to 4 spring starts. I am afraid to even think what happens with the Davis Diesel crankshaft but I hope the suction is OK. Please, note, people who do model airplanes do not care as much how easy their engine would start and most of them use electric starts.

Regardless of this post, the best way is to wait and see how the Davis Diesel crankshaft performs.
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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Status Report

Post  StevenStanleyBayes Fri May 08, 2015 6:20 pm

Received the order from Cox yesterday.

Ordered glass syringes and lab glasses from AliExpress.
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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Status Report

Post  StevenStanleyBayes Sat May 09, 2015 2:27 pm

Got stainless steel canister and bottle from Walmart. Airtight. Can be made even morebairtight with O rings from the automotive shops. Silicon squeezed gaskets not recommended. Do not work very well even when well installed. Leak.
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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Airplanes

Post  StevenStanleyBayes Sat May 09, 2015 2:32 pm

Whatever difficulties I have pointed out do not apply for airplanes. Cox crankshaft OK. Cannot be broken.

Spring start OK. Takes 10 seconds under correct circumstances as noted. Starts with any propeller for 10 seconds.

This clarification is necessary so people are not mislead on the engine. The engine is perfect for airplanes.

Methanol is better than Kerosene for airplanes. Seems to start eadier as well as provide a fuller burning, hence higher power and even higher at huge RPM.

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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Presure Sensors

Post  StevenStanleyBayes Sat May 09, 2015 2:42 pm

Membrane pressure sensors are available. Used in explosive evaluation. Membranes made of metal. Various pressure ratings available. Depend on size and support.

May be possible to be used as protection gaskets. Break in pressure unknown and depends on counter piston pressure.

Counter piston and metal may fall into and damage the cylinder and the piston.

Can be chosen to an extend when the shatter pressure for the Teflon gasket is known, yet, empirical test and see cannot be avoided becausevof the dependence onvradius and counter piston pressure. Can be chosen for maximal counter piston pressure as this is the most likely circumstance for high RPM or compression.

The best would be for a manufacturer to install them on the side of the chamber, replaceable.
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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Re: Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine

Post  StevenStanleyBayes Sat May 09, 2015 2:48 pm

StevenStanleyBayes wrote:
ian1954 wrote:You would not normally use any "screw" fitting for the crankshaft pin. It is far quicker and simpler to use a rod (usually a drill rod) of the correct size and drill and ream a hole to produce a very tight press fit.

Crankshafts are not comparable by sight. The strength of these depends on the steel used and the degree of tempering employed.

The Davis crankshafts I have are made from a chrome steel alloy.  I am not sure that the lack of narrowing of the middle of the shaft would make any difference to lubrication. The Cox crankcases usually carry a groove for lubrication. The narrowing may have been done to reduce the friction of the bearing area  but, then again, the reduced area could induce wear leading to the crankshaft  wobbling.

The standard Cox crankshaft seems to be made from a free machining carbon steel that has been ground, polished and heat treated.

Often the pin breaking is not through the weakness of the material but because of flooding and/or the ball and socket joint in the piston loosening and creating a hammering action.  


This is very good information, thank you.

A rod would be OK as long as the rod can be stable and not move. A screw would be much more stable. Rod or screw with micro welding and high temperature Lock Tight ( in case such is available to withstand the working temperatures ) is even better. Thus, in case there is a way to weld the rod with micro welding, this would be very stable. Tempering can be carried out thereafter to either harden or soften the assembly. The welding point may have different qualities, depending on the tempering after welding.

Micro welders are either plasma or laser welder which pin point the weld spot with lower than a millimetre precision. They look like a pen or a pencil and are very easy to work with. May still be expensive though.

Every person on the internet swears by the Davis crankshaft, therefore, they must be very good. Steel Alloys are better than steel. Hopefully, the Chromed steel used does not rust unlike the simple steel.

When the engine rotates, a tiny part of the fuel, containing oil, goes between the crankshaft axel and the housing. The narrowing acts like a buffer, a fluid capacitor, which stores more oil in between the narrowings as well as creates a lower resistance towards the coming oil into the axel and axel housing. Thus, the engine would be always oiled well and more oil would come into at the expense of fuel loss which is negligible. In case Davis Diesel crankshaft allows for a good clearance between the axel and the housing, then the axel will be oiled OK and the only difference is the lack of storage of oil to be used whenever needed and whenever the crankcase cannot pump fuel into the axel and axel housing.

Because many people on the Internet are extremely happy with the Davis Diesel crankshaft, maybe, the clearance is good enough and the oiling is good enough.

True, the friction of the Cox crankshaft is concentrated on the two wider points but these are very long to create any significant damage. True, the Davis Diesel crankshaft spreads the force throughout the whole axel but this may also mean more friction.

However, the main concern with the Davis Diesel crankshaft I have is whether the crankshaft can generate a good suction which is the most important consideration for this design. The Cox crankshaft generated such a wonderful suction, I was able to start the engine in less than 10 seconds, just 2 to 4 spring starts. I am afraid to even think what happens with the Davis Diesel crankshaft but I hope the suction is OK. Please, note, people who do model airplanes do not care as much how easy their engine would start and most of them use electric starts.

Regardless of this post, the best way is to wait and see how the Davis Diesel crankshaft performs.


Sorry. Forgot. I do not mean ti fight but to say the truth which is NOT known by most of the people.

Regardless who says what, Cox diesel crankshafts CANNOT be damaged by flooding. I say so with 100% certainty. I have been doing thousands of floodings under all posdible circumstances even whe forcing with a powerfull high RPM drill on full power without pulsing FOR 4 MONTHS.

In case this is not a proof, I do not know what is.
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Post  robot797 Tue May 19, 2015 3:12 am

how is your generator

does it still run?
or
does it run again?

mine is at a standstill
i ran out of fuel
lol!
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Post  StevenStanleyBayes Tue May 19, 2015 1:19 pm

robot797 wrote:how is your generator

does it still run?
or
does it run again?

mine is at a standstill
i ran out of fuel
lol!


I am still waiting for the crankshaft. Please, see the status report I am now to write.

DID YOU RECEIVE THE ITEMS FROM COX INTERNATIONAL? This is important in order to figure out what action to take in case you have not. Maybe to contact the Dutch customs and postal service?
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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Status Report

Post  StevenStanleyBayes Tue May 19, 2015 1:29 pm

I have not received the crankshaft yet but I would wait a while because yesterday was the first long weekend of the summer and nothing has been working for a long while.

Davis Diesel is based in Florida, hence, I would clarify : the first long weekend in the summer is a very big deal in Northern countries and states with cold and long winters. Consider this very close to Christmas.

Also, US mail is considered more like domestic here than foreign. The post office considers international mail with priority over domestic. This is why, I expect robot797 to receive mail from Canada and, probably, US to The Netherlands faster than I.

Thus, a good idea is to wait until next week.
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Post  robot797 Tue May 19, 2015 3:30 pm

StevenStanleyBayes wrote:


I am still waiting for the crankshaft. Please, see the status report I am now to write.

DID YOU RECEIVE THE ITEMS FROM COX INTERNATIONAL? This is important in order to figure out what action to take in case you have not. Maybe to contact the Dutch customs and postal service?

yea i have the package

it was at my neighbors home
they forgot to give it to me
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Post  StevenStanleyBayes Tue May 19, 2015 9:14 pm

robot797 wrote:
StevenStanleyBayes wrote:


I am still waiting for the crankshaft. Please, see the status report I am now to write.

DID YOU RECEIVE THE ITEMS FROM COX INTERNATIONAL? This is important in order to figure out what action to take in case you have not. Maybe to contact the Dutch customs and postal service?

yea i have the package

it was at my neighbors home
they forgot to give it to me


The most important think is you got the package. What was the problem? Was the address wrong or the postman made a mistake?
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Post  robot797 Tue May 19, 2015 9:53 pm

here in holland when sombody is not home they deliver it to one of the neighbors
and i get a little note were my package is

my neigbours are not always home
that is what it boils down to
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Post  StevenStanleyBayes Wed May 20, 2015 2:53 pm

robot797 wrote:here in holland when sombody is not home they deliver it to one of the neighbors
and i get a little note were my package is

my neigbours are not always home
that is what it boils down to


This is a good arrangement. In most countries this is not allowed because of privacy. Again, the most important is you got the mail and you can build a second generator.
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Micro 12VDC Generator with a Cox .049 Sure Start Diesel Engine - Page 26 Empty Status Report

Post  StevenStanleyBayes Fri May 22, 2015 12:56 pm

Davis Diesel crankshaft just received. Local post slow. Not yet opened but hope OK. Happy to receive the crankshaft.

Davis Diesel demonstrated an excellent service. Price OK. Shipping excellent. Not seen the product yet but sure to be excellent as every one says.
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