RCU Forums - J'en 26cc problem

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Jim Cattanach

07-04-2009 11:50 AM

J'en 26cc problem

It seems I am destined to have no luck trying gassers. First it was my ignition interference problems, now I lost my CMPro Mustang when the engine stopped during a flight.
I found that the plastic carb fuel pump connection at the base of the engine cylinder had softened with the heat & fell off. I am surprised that the manufacturers fit a plastic nipple in an area that gets hot. The engine was not too lean, if anything it was a little rich, as I was running it in. I now have the engine running again by fitting a piece of Tygon over the remaining brass stub & securing it with tie wire.
Has anyone else had this problem.

bcchi

07-04-2009 11:34 PM

RE: J'en 26cc problem

Quote:

ORIGINAL: Jascat100

It seems I am destined to have no luck trying gassers. First it was my ignition interference problems, now I lost my CMPro Mustang when the engine stopped during a flight.
I found that the plastic carb fuel pump connection at the base of the engine cylinder had softened with the heat & fell off. I am surprised that the manufacturers fit a plastic nipple in an area that gets hot. The engine was not too lean, if anything it was a little rich, as I was running it in. I now have the engine running again by fitting a piece of Tygon over the remaining brass stub & securing it with tie wire.
Has anyone else had this problem.

If it got that hot,it was too hot. Baffel some air around this area.
BCCHI

freeair

07-05-2009 02:17 AM

RE: J'en 26cc problem

yes if your talking about the black plastic type fuel inlet to caby, your engine must be getting very hot to where the carby is positioned, work out some type of ducting so better air flow gets to the carby as well as the cylinder .

Jim Cattanach

07-05-2009 02:56 AM

RE: J'en 26cc problem

Quote:

ORIGINAL: freeair

yes if your talking about the black plastic type fuel inlet to caby, your engine must be getting very hot to where the carby is positioned, work out some type of ducting so better air flow gets to the carby as well as the cylinder .

No, it is not the fuel supply pipe, it is the pipe that allows the carb to suck fuel from the tank. It was the black plastic nipple at the engine end that softened & fell off. The nipple at the carby end is fine. Plenty of air circulation, as the model was previously fitted with a Saito 180 & the much of the lower cowl is cut away.
To my mind, any plastic attached to the engine cylinder is likely to melt.
The weather is getting hot here. It was in the low 40'sC the day it happened. Maybe that didn't help.

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