Search found 5 matches

by cassini
Sun Sep 14, 2014 6:29 pm
Forum: Help
Topic: Erratic RPM Forty Featherweight.
Replies: 13
Views: 14723

Re: Erratic RPM Forty Featherweight.

The good news is my compression tests at 8.4 bar, 125 lb/in2, which sounds fine to me! However, the engine got so hot during my trip when I turned it to idle to take a look see at landing options at Cawsand, (as it stopped pumping cooling water of course, duh!) that the spark plug slightly melted th...
by cassini
Fri Sep 12, 2014 12:58 am
Forum: Help
Topic: Erratic RPM Forty Featherweight.
Replies: 13
Views: 14723

Re: Erratic RPM Forty Featherweight.

Hello Jon, I'm not quite sure what the throttle slide is ;0) If it is the cylindrical item that moves up and down with the throttle position that one can see looking into the air intake, it's position is determined entirely by the thottle cable, isn't it? It seems to go up and down freely. My Seagul...
by cassini
Wed Sep 10, 2014 11:41 pm
Forum: Help
Topic: Erratic RPM Forty Featherweight.
Replies: 13
Views: 14723

Re: Erratic RPM Forty Featherweight.

There's no leak from the tap. I don't know what the ignition system is and can't look until the weekend. However, I had the recoil starter housing off last year and looked at the points and gaps and they appeared OK. I'll look again though. The plug is gapped to 0.5mm, though it usually looks a bit ...
by cassini
Wed Sep 10, 2014 6:26 pm
Forum: Help
Topic: Erratic RPM Forty Featherweight.
Replies: 13
Views: 14723

Re: Erratic RPM Forty Featherweight.

Hello Charan, Thanks for the reply. I shall use fresh fuel next time but I don't feel that's the problem - it was fuming and quite volatile. I will take the carb apart and clean it but it doesn't appear to be too bad - I've had the barrel out already and in fact had it out and cleaned last year when...
by cassini
Wed Sep 10, 2014 12:57 am
Forum: Help
Topic: Erratic RPM Forty Featherweight.
Replies: 13
Views: 14723

Erratic RPM Forty Featherweight.

Hello to the Forum. I haven't used my engine in quite a while, but put a new throttle cable onto it last year when the old one snapped. I seem to get full carb barrel(?) movement via it. Anyway, on Monday, motoring across Plymouth Sound with my 1976 Bing Carburettor Forty Featherweight on the transo...