Pro 785 runs better with seat off to rich ?

[sloan_william@msn.com]

Have a 785 that with seat on runs at high speed than slowly dies. Hit the primer with 3 to 4 shots. starts right up and runs great for 30 seconds again dies. With seat off runs fine . Check no exhaust leaks, fuel leaks, new fuel pumps , carbs rebuilt, and new fuel lines. Plug color good. and check pickup tube too rich fuel mixture ? Kind at a lost what to try next

[Mr. GP1800]

Check for exhaust leaks

[TxVirageTx]

yup exhaust leaks

[785 lugs]

did you pull the collector and check it for pin holes

[sloan_william@msn.com]

No, checked for exhaust leaks none, anyways bigger issues now
Thanks for the input

[Polaris_Nut#1]

Check the exhaust hoses for internal collapses. It could have a bubble on the inside that smells up somewhere blocking exit flow.

[sloan_william@msn.com]

Update , was the stator when cold readings were within spec, when hot readings went off the wall . Thinking with the seat off maybe was getting cooler air over the engine Big thanks to Lugs 785 for helping me out !!