I have a G-62 in a Cap 231EX that sags and losses power in anything but level flight. This includes loops, inverted and knife edge flight.

I have taken the carb apart, inspected the gaskets and cleaned it. I didn't see any problems. I have replaced the gas tank and fuel lines, richened both the high needle and low needle and tried two different props (20X10 and 22X10). I also cleaned the spark plug.

Unless someone has any new ideas I was going to get a rebuild kit for the carb.

Any help is greatly appreciated.

Randy

How much time do you have on the engine , did you buy it new? If the eng. is new reset the needles to factory per the instructions then run about 1/2 gallon of fuel thru it. Use a tach.and check the rpms . Also stick with the 22 inch prop. Adj. the low speed needle then the high . Remember low end adjs. will affect high end but not vice versa. Have patience.

Sounds to me like your getting pressure changes inside the cowl which are affecting the pump diaphram. solder a brass tube over the hole in the carb pressure plate and run a gas safe tube back inside the fuse and see if that fixes it.

My experience is the same as s3nfo suggests. My G-62 was in a Lanier Cap232 that exibited over rich/blubbering mixture when any change from level flight, especially knife edge.

The solution, was to silver solder a barbed fitting over the diaphram hole and run a fuel line from it to a static air source(inside the fuse) just as suggested.

I bought the engine used and don't know how much time it has on it. I adjusted the idle and then the high speed. No matter how rich I make it, it still goes lean.

I am going to take the cowl off and see if this makes any difference. If it does I will try soldering a tube to the carb.

Thanks for the help.


Randy

generaly the pressure will come into play when it goes rich (four strokes), a leaning problem is usually a carb pump problem.which power loss is yours, rich or lean?


Darin

On all my gas motors,G62 included, I always put a ram air type intake onto the carb; has a 45degree slant back on tube [Bennett sells them or make one] . This comes out thru a hole in the cowl .
Does this motor lean out etc with the cowl off? This will tell if you have turbulance inside cowl & is causing the prob;

The engine goes lean and loses power. I have not had a chance to try it without the cowl. I was going to fly it this last weekend, but my wifes honey do list came first. I have a carburetor rebuild kit and a venturi coming. Hopefully one of these will fix the problem.

Thanks for all the help.

Well if you fly at the Seahawks field atleast you have got plenty of room for a dead stick! How did you even get that thing to balance? I've got an ST 2500 in mine with a killer battery towards the back and still added tail weight! My G62 on my Giant Stinger uses a Velocity Stack and the carb is exposed out side the cowl and have no problems. Get the carb number and go to a shop for a rebuild kit. You may have a bad diaphram.

BDTSR

It is slightly nose heavy, but not too bad. The biggest problem I had was with it nosing over when I applied power. I fixed that by putting aileron stock under the landing gear.

I've gotten several suggestions as too what the problem could be and hopefully one of them will work. Isn't this a great site? You couldn't get this kind of help at the field.

Yes I fly at the Seahawk Air Park. And even with the large size, I have managed to land in the forest to the north.

Randy

My dad belongs to the Seahawks. He lost a plane over on the far side. Then 2 months later the brush fire went through and burned everything. Never did find the plane!

Shadow,

check for any leaking gaskets, carb, cyl. head c'case and also could be a leaking front seal allowing engine to suck air.