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Cox Engine of The Month
Is this Engine Worth going to the trou...
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getback- Top Poster
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Posts : 10116
Join date : 2013-01-18
Age : 66
Location : julian , NC
Re: Is this Engine Worth going to the trou...
Take the carb off and hit the head with a torch for a minute of so, then the bolts should come right out.
badbill- Gold Member
- Posts : 312
Join date : 2015-08-13
Age : 67
Location : Centerville, Georgia
Re: Is this Engine Worth going to the trou...
A torch is possibly too much, try a heat gun first. Aluminum expands more than steel so the screws should come out easily when hot. When castor is bubbling out of the gaps it should be hot enough.
The carb screws are probably glued in too, so heat is needed there as well.
Phil
The carb screws are probably glued in too, so heat is needed there as well.
Phil
pkrankow- Top Poster
- Posts : 3025
Join date : 2012-10-02
Location : Ohio
Re: Is this Engine Worth going to the trou...
Yes that is good advice and just haven't got to it yet ... But are these pretty good engines (it there is nothing wrong inside) I have Enyas and OS .15 I think RCs .. Eric
getback- Top Poster
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Posts : 10116
Join date : 2013-01-18
Age : 66
Location : julian , NC
Re: Is this Engine Worth going to the trou...
Just warm it up in an oven or with a heat gun. Most of the time you don't even need to take them appart.
Not sure which model you have there, is it loop scavanged?
These are quite nice engines, lightweight and farily powerful for their weight. The one I have (loop scavanged, steel/iron construction) will do around 14000rpm on a 8x4 prop.
Not sure which model you have there, is it loop scavanged?
These are quite nice engines, lightweight and farily powerful for their weight. The one I have (loop scavanged, steel/iron construction) will do around 14000rpm on a 8x4 prop.
Surfer_kris- Diamond Member
- Posts : 1905
Join date : 2010-11-20
Location : Sweden
Re: Is this Engine Worth going to the trou...
pkrankow wrote:A torch is possibly too much, try a heat gun first. Aluminum expands more than steel so the screws should come out easily when hot. When castor is bubbling out of the gaps it should be hot enough.
The carb screws are probably glued in too, so heat is needed there as well.
Phil
FYI only, a torch is fast and works great, won't hurt anything. Been using one for this for many years.
badbill- Gold Member
- Posts : 312
Join date : 2015-08-13
Age : 67
Location : Centerville, Georgia
Re: Is this Engine Worth going to the trou...
These are nice little engines, basically a knock-off of a O.S. .15
Re: Is this Engine Worth going to the trou...
Mark Boesen wrote:These are nice little engines, basically a knock-off of a O.S. .15
I don't know, which OS engine would that be?
It looks more like an Enya to me...?
Surfer_kris- Diamond Member
- Posts : 1905
Join date : 2010-11-20
Location : Sweden
Re: Is this Engine Worth going to the trou...
I don't know what that means but its a 7703 as I posted Kris , EricSurfer_kris wrote:Just warm it up in an oven or with a heat gun. Most of the time you don't even need to take them appart.
Not sure which model you have there, is it loop scavanged?
These are quite nice engines, lightweight and farily powerful for their weight. The one I have (loop scavanged, steel/iron construction) will do around 14000rpm on a 8x4 prop.
getback- Top Poster
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Posts : 10116
Join date : 2013-01-18
Age : 66
Location : julian , NC
Re: Is this Engine Worth going to the trou...
Thanks That is more what I was looking for . EricMark Boesen wrote:These are nice little engines, basically a knock-off of a O.S. .15
getback- Top Poster
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Posts : 10116
Join date : 2013-01-18
Age : 66
Location : julian , NC
Re: Is this Engine Worth going to the trou...
getback wrote:Thanks That is more what I was looking for . EricMark Boesen wrote:These are nice little engines, basically a knock-off of a O.S. .15
I would still like to know which OS engine that would be...?
I can't remember seeing any OS .15 engine with a crank-case like that?
It was Enya (and Fuji, HB etc.) which had the removable, and rotatable, front and no removable backplate.
After googling a bit it seems this is perhaps the first version of the .15 engine from TT. The one I have is possibly slightly younger, but still with the the baffle on the piston.
Surfer_kris- Diamond Member
- Posts : 1905
Join date : 2010-11-20
Location : Sweden
Re: Is this Engine Worth going to the trou...
Sorry, i typed faster than i thought...i think Kris is correct, it looks like the design was swiped from Enya, not O.S., but still a decent engine.
http://www.osengines.com/history/ostimeline04.html
http://www.osengines.com/history/ostimeline04.html
Re: Is this Engine Worth going to the trou...
When TT started out they were copying Enyas. During that phase quality was hit and miss because the makers were learning. I saw one that had broken when someone flipped it in the hobby shop. Others were great. I would clean it up and try it. Since it has been run I would guess that it is one of the good ones.
TT quality grew by leaps and bounds. The ones I have are similar to the OS FP with some exceptions like the venturi (yes, CL) uses a sprinkler similar to a COX TD. All of my TT's (.10 to .25) are excellent runners. Here is the TT .10.
George
TT quality grew by leaps and bounds. The ones I have are similar to the OS FP with some exceptions like the venturi (yes, CL) uses a sprinkler similar to a COX TD. All of my TT's (.10 to .25) are excellent runners. Here is the TT .10.
George
gcb- Platinum Member
- Posts : 908
Join date : 2011-08-11
Location : Port Ewen, NY
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