DUHAWK49

My Feedback: (6)

GOT A NEW MAG 1.8 AND I CAN GET IT STARTED BUT IT WILL RUN STRONG FOR A BIT AND JUST CUT OUT.. NEED SOME SUGGESTIONS ON WHAT TO DO... .. IVE CLEANED OUT THE CARB BECAUSE I WAS GETTING BACK PRESSURE WHEN BLOWING IN FROM THE EXHAUST LINE.. IS THERE ANY BEST WAY TO TRY TO CLEAR OUT WHAT COULD BE CLOGGING IT IN THERE? ALSO IS THERE A CERTAIN TYPE PLUG THAT WILL WORK BEST IN IT? USES A LONG PLUG. ALSO ANY SUGGESTIONS ON BEST SETTINGS OF THE IDLE SCREW AND HIGH END WOULD BE APPRECIATED. THIS IS MY FIRST LARGE ENGINE SO IM NOT SURE IF THERE ARE ANY SECRETS FOR SOMETHING LIKE THIS OR NOT, THAT IS DIFFERENT FROM SMALLER ENGINES? ANY SUGGESTIONS OR HELP WOULD BE APPRECIATED

TheEdge

My Feedback: (788)

Was that with the low end idle screwed out ?
All the way even ?

DUHAWK49

My Feedback: (6)

THAT IS WITH THE LOW END NEEDLE OUT 2 -2 1/2 TURNS

TheEdge

My Feedback: (788)

Then take it out further till you get some blow by

DUHAWK49

My Feedback: (6)

OK THATS WHAT I WAS TRYING.. MAYBE I JUST NEED TO KEEP GOING WITH IT

Mighty Mouse-RCU

My Feedback: (145)

You may need to move up to a larger fuel tubing.

DUHAWK49

My Feedback: (6)

THATS A GOOD POINT.. IM USING STANDARD LINE.. ITS A BIG ENGINE SO MAYBE I NEED TO GIVE THAT A TRY TOO.. WILL TRY THAT TOMORROW ONCE THE SHOP OPENS.. ANY SUGGESTIONS ON LINE SIZE?

TheEdge

My Feedback: (788)

Blow into a line directly to the carb and listen or feel for a slight flow of air through the low end

DUHAWK49

My Feedback: (6)

BLEW MY BRAINS OUT DOING THAT ALREADY TODAY.. MAYBE IT IS AS SIMPLE AS GETTING LARGER LINE TO ALLOW MORE FUEL FLOW.. WHEN I BLOW DIRECTLY INTO THE CARB I CAN SEE AN HEAR IT GOING THROUGH, BUT WHEN I WOOK IT UP TO THE TANK AND BLOW THROUGH THE EXHAUST LINE THATS WHEN I HAVE A PROB.. SEEMS TO GET A LIL BACK PRESSURE WHICH I KNOW ISNT RIGHT.. GUESS I CAN FIRST TRY THE LARGER LINE AND TURNING THE LOWER END OUT EVEN MORE TO SEE HOW THAT WORKS.

DUHAWK49

My Feedback: (6)

well i put larger tubing in the tank and to the carb, put a piece of line over the needle to make sure no air is getting in and replaced the plug.. i was still having problems keeping it running. then after about 2 hours of this i noticed that the line was getting kinked a bit in the fuselage.. once i relieved this i was running strong. before i got to this point though the engine back fired a few times and started running in reverse.. whats up with that.. never had that happen before.. anyway after i dekinked the line it ran strong, rich but strong.. i literally had to get on top of the model to keep it from going anywhere.. the engine isnt even broken in and im thinking this engine will make a lil rocket ship out of my h9 cap 232. even while running very rich i was getting close to 9000 rpms on a 16-10 apc prop. once i have it tuned in right i bet i will have it near 10000.. should be a screamer if all goes well.. thanks for your help..

THE TAILBACKER

Not to get away from your problem but My St G90 and 3250 low ends were out around 4 turns before I got air through it. I don't think its fuel tubing.