Mills S75 starting problems

Here, my friend Peter Valicek, show how mix home-made diesel fuel.

OK Good Stuff Guys ,Thanks!! , José's the piston is set correct I came back to the house and checked with the drawings from the speck sheet I have, I am pretty sure the needle adjust valve is clear but will ck. when I get it off the stand to refit the bowel . I will get some things together today hopefully I need to go to town anyway . With the help I have from my friends here there is no reason I cant get this baby running . I love your excitement of you and your son José's. Eric

Got this stuff yesterday I hope it will do the trick I will print off Bill's reply and take to the shop to get my measuring right ... getback

Good luck. I hope this does the trick for you.

Eric,

That Cetane booster looks like snake oil to me! Never heard of one that claims to fix every diesel fuel problem.

Look in the phone book for an Amsoil dealer, and call a few of them. Tell them you only need a one or two ounces, and you may find a dealer with a bottle on the shelf, who is willing to provide a small sample.

I believe it only came in pints when I bought mine. It wasn't a lot of money, but a pint is going to last for years!

Bill

Well the snake oil was rather expensive but if you don't like I will keep looking I think there is a place not far in the other direction I can get they are a dealer ,, Do I want the Diesel Cetane booster ??? The JD dealer I went to had Cetane booster for 2 and 4 cycle engines and this stuff I got was all > Eric

This Amsoil is being a pain to try and get there are only 2 dealers here and they don't keep stock or just have oil I am still waiting on a call back from one that has to get in touch with his retailer to see if he can bring some by ??/ I can order on line but the shipping will put it out there as far as $$$ getback

Eric,

Haven't heard anything on this for a while. Have you been able to give it any more time? Hopefully, you are having some better luck with it.

Bob

fit90 no I have detained but have just checked it and appears the liner has turned as I tighten the head , there for NO intake to the combustion chamber , seems I will have to get it positioned correctly without the carb. on and I think we can get the barking sound to continue to a run !! No promises but I am excited about trying again , still no cetane boost but I think it will run without this for now . We will see. Eric

Eric,

If I recall correctly the Mills 75 has a pin to locate the liner, and keep it from turning. Seem to remember it was a small loose fitting pin, and very easy to misplace.

The only Mills 75 type engines I have are the Russian version (sold by Ed Carlson), and an Irvine MK1 replica that I recently purchased on Ebay. Haven't run either one.

Bill

smooth_bill wrote:Eric,

If I recall correctly the Mills 75 has a pin to locate the liner, and keep it from turning. Seem to remember it was a small loose fitting pin, and very easy to misplace.

The only Mills 75 type engines I have are the Russian version (sold by Ed Carlson), and an Irvine MK1 replica that I recently purchased on Ebay. Haven't run either one.

Bill

Bill, the original Mills P75 never had the locating pin. This fault was rectified in a number of the later "knock-offs". A rotating liner was a real potential problem. Mine has grooves cut inb the rod from where the cylinder muff came loose while runnung and allowed the liner to float, catching the lower edge cut-outs on the rod.

Rod,

Thanks for the correction.

I read about the pin somewhere, so it must have been a replica review.

The Russian copy is probably not dependable, and the Irvine is NIB (or so the seller claimed), so I don't plan to run them.

Bill

getback wrote:fit90 no I have detained but have just checked it and appears the liner has turned as I tighten the head , there for NO intake to the combustion chamber , seems I will have to get it positioned correctly without the carb. on and I think we can get the barking sound to continue to a run !! No promises but I am excited about trying again , still no cetane boost but I think it will run without this for now . We will see. Eric

Eric,

Glad to hear you got that figured out. It sounds like one of those things that could drive you crazy for a long time. I hope this is it and you get it running. Keep us posted.

Good luck,

Bob

Algae grows in diesel fuel?!

RknRusty wrote:Algae grows in diesel fuel?!

Yep. Sure does. I see the problem all the time. A lot of local farmers have an overhead diesel tank which they gravity fill their tractors from. When the diesel doesn't get used up quickly enough the air-space in the tank can create a lot of condensation. The algae grows on the inner surface of the top of the tank as well as on the surface of the fuel. Eventually it breaks away and gets sucked through the fuel system, usually blocking the filter. It also happens in tractor/truck fuel tanks when they are left stationary for long periods. It just looks like a black jelly (jello?)-like slime. Usually when a fuel tank becomes infected you only find out when the filter blocks. You then need to add an algaecide to break down the algae which will then block the new filter. It often takes several treatments and several filters. Algae spores can transfer from one tank to another causing "infection" to spread.

smooth_bill wrote:Rod,

Thanks for the correction.

I read about the pin somewhere, so it must have been a replica review.

The Russian copy is probably not dependable, and the Irvine is NIB (or so the seller claimed), so I don't plan to run them.

Bill

The following is from the "Modelenginenews" website.  It's an excellent article on the Mills & explains the pin modification, as noted below.
http://www.modelenginenews.org/ Search "Mills P75" and click on article No. 50.

"Well worth noting is the extreme danger presented by the cylinder liner rotating as the head is tightened down. The 1/8" diameter conrod is swinging in two 5/32" slots milled in the skirt of the liner. Unless the liner is a tight press fit in the case, it is apt to rotate a bit on assembly as the head is screwed down. If this happens, the rod will rub in the slots. Bad for the rod and bad for power loss. Worse, if it moves under vibration, the engine can jam solid with painful results (ask me who has had that happen to them...) The Doonside Mills solved this problem by inserting a small pin into the case that registers with a slot in the liner flange. This assures correct alignment and permits the head to be tightened with no fears. Again, the Classic plans will show this modification. The photo shows the pin fitted to my own prototype Classic kit built engine, regrettably after having disaster scenario #2 occur. This is a bullet proof mod that is easy to do with a Dremel cut-off wheel to cut the slot. After setting the alignment, the slot itself is used as a guide for a #68 drill. To complete the modification, a short pin made from 1/32" piano wire is then pressed into the hole so its top is just below the top of the liner flange."

Hi Eric



Enjoy  friends

Very good Jose. Fun entertainment on a Saturday night.
Gracias hermano.
Bob

Hello Jose OK I get it I have been slacking lately , and see if I can't get some fun going on this day , Good Video Friend ! Eric

Yea Jose'! I like your comparison of the American Nito engine/dragster, fast loud and nasty, to the British Diesel engine/ horse drawn coach, reserved quiet and polite. ( well manored).

Happy Father's Day, I´m glad you like it.

Hi,
My first post.
I realise this is 12 months on, and hope the Mills.75 is up and running.
Just a tip on the revolving barrel issue, when tightening the head (exhaust ports open),
try inserting a piece of non-metallic material (thin strip of hardwood or ply) the width of the
ports in one side and out the other. This will hold the barrel in alignment while tightening,
then remove. (Can't remember where I first read this, but it sure helps)
Not as good as the pin and slot method as on the Doonside, as the head may still come lose in service, but at least it stops the turning barrel syndrome on tightening the head.
Cheers!

Great first post

guys n gals helping guys and gals with all sorts of hints and suggestions


 Guys seem to know a lot of diesel related stuff

Not intended to diss all the other diesel gurus on CEF