Pred Gas/23 way too hot

[piyanthak]

Just can't understand why the engine is reaching 240F and cutting out. I've got the L/H at the factory settings (1 1/4-L and 1 7/8-H). I'm using 98Octane with Hi perform 2T Oil.

Can't seem to start it after that too.

Any help would be appreciated.

I have given up after the last run with the top half of the assembly removed where I ended up splitting the clutchand luckily avoiding the piece of the clutch flying off.

Thanks.

[mickmurphy]

Gday it seems to me that your fuels Octane is to Hi the boys here in OZ run 91% and we run 25/1 with the oil :cool:


mick :cool:

[WillJames]

Check for exhaust leak at the header, also an air leak at the carb where it mates to the motor.

Does it tend to overspeed?

[DebianDog]

You want low octane not HIGH octane also. Richen the crap out of it. Mines runs at or below 200* if it is not "stinking hot" outside.

[piyanthak]

Phew! Got the engine started over the weekend.

Had to richen the low speed to about 1 1/2 and now it seems to run around 160F. Probably try the high speed settting after putting the top frame/head back on.

Is it safe to run the engine hard whithout a load??? e.g. without the top frame.

I thought the high octane would give the engine a bit more power (besides the gasoline here is way cheap.

Thanks all for the valuable advice.

[mickmurphy]

I would NOT rev the motor hard with no load on the motor. I my self thourght that my self the higher the octane the better the motor will run that is WRONG. when we setup a motor here in we start with 2 turns out on the low end then we go 1 3/4 on the high end the tune the motor to sute i have had no problem after i have ran about 4 gal i change the plug and then fine tune the motor

I hope some of these tips help you

mick from australia :cool: