I have a G26 mounted in a Great Planes PT19 that I have for about a year. Both were purchased brand new. The engine has never performed up to standards. We have tried everything including new carbs. It is now on its third.
Has anyone had a similar experience with this engine and any suggestions would be appreciated.

Regards
A3

Send the G26 to RCIGN1....he will make it sing!!! Capt,n

What does it not do ? Need a better description of your problem.

Most recently after the installation of the new carb it seemed to making good power on the ground and running well, as soon as it got into the air it started to sag at full power, I pulled the throttle back to 1/4 just enough to get around the pattern and land. We reset the needles and took the velocity stack off. Same thing. Recently I have put on a whole new fuel system, tank , hoses and fittings trying to solve the problem.
At wits end in fla
A3

If the whole carb sticks out of the cowl...try blocking the diaphram vent hole as I mentioned in the PM

Spitfire7856

I have a Giles 202 with a Brillelli 26cc gasser on the business end and it was doing the same thing. It would run great on the ground and just as soon as it lifted off it would sag. In my case it turned out that the engine was fine, it was the air flow off of the cowl that was causing the problem. I installed a copper 90 degree elbow in the plastic vilocity stack so the opening was facing forward and that stopped all the problems.

Do you have a static line hooked to the carb and run into the fuslage? You don't want to block the static hole. It is there for a reason. The carb uses static pressure to meter the fuel it flows. If air blows into the hole it will create pressure causing the engine to go rich in the air. If air blows over the hole it can cause it to go lean. By installing a pressure tap in the hole, grinding it smooth on the inside, and run a line from it into the fuslage, the problem may be solved. It is a common problem with gas engines. The carbs are not really made to have air blowing all around them.

If you are having a problem caused by the airflow on the diaphragm plate, blocking it with duct tape does work fine. Once you have established that as the cause, then go to the trouble of running the line into the fuse. Just as I mentioned in the PM I sent you. I recently had this problem and sticking a piece of duct tape over the hole fixed it, so I went ahead and routed the vent into the fuse. Now it runs exactly the same as it did with the vent hole covered with duct tape. the same hold true for the other times I have done it.

Thanks for the tip
I soldered a piece of brass tubing over the vent hole and put a piece of fuel tubing over it and run it into the cowl. Will try again this weekend and let you know.Again, thanks for the help
A3

A...Let me know when you plan to be at the field...
I'll meet you there, and I'll have my PT-19 too.
Jim

Sunday AM
See you there
A3