JBA .75 LEAN problem
 

I just bought a kanke waco upf 7 w/ a JBA .75 .I'm having a serious problem w/ this thing. 1) it is soooo tight it will baerely make one revolution. 2) when i turn the hsn out , it does not effect the way the engine runs. I went 4 turns out and it didn't richen at all. Though air leak , but I sealed the entire engine and , no change. thought was fuel line , no change , different tank , no change , any ideas , please let me know.

RE: JBA .75 LEAN problem
 

If the engine is that tight it is probably working very hard and no amount of adjusting on the needle will help, you might check the bearings and find out what is making the engins so stiff. You might need a new set of bearings or the crank might be gummed or seized up. Just tear it down and find the stiff[&o] parts then it will run fine if its not destroyed (hope)

RE: JBA .75 LEAN problem
 

the engine is brand new , the reason it is stiff is bc of the pinch at tdc.