I was having problems with my B&S 2 cyl engine for my riding mower and had previously posted the problem. Running rough, burning rich, etc. I cleaned the air filter, replaced plugs, fuel filter, needle valve, cleaned carb (twice), adjusted the tab on the float, etc.
After putting the whole thing back together after disassembling the carb for the second time, I still had the problem. After starting, then engine ran fine, that is for awhile until I put it in gear (under load).
I discovered the problem was NOT the carb. I noticed the throttle on the carb was pushed wide open, but the engine was rough and giving off black smoke. Pushing on the governor lever a few times cleaned up the problem--the engine settled into running great. That is of course, until put under load. Again messing with the governer lever (that connects to the throttle lever on the carb) while the engine was running brought everything back into line. It seems like it wants to push the throttle wide open and then too much fuel causes it to burn rich and I guess since it is not reving up to speed due to the (rich rough running) it keeps the throttle wide open.
I know nothing on how the governor works other than it is between the throttle control lever on the dash and the throttle lever on the carb and that messing with it makes the engine run smoothly again.
What gives and what do I do now?
Thanks,
Dale (dh of mary, tx)
After putting the whole thing back together after disassembling the carb for the second time, I still had the problem. After starting, then engine ran fine, that is for awhile until I put it in gear (under load).
I discovered the problem was NOT the carb. I noticed the throttle on the carb was pushed wide open, but the engine was rough and giving off black smoke. Pushing on the governor lever a few times cleaned up the problem--the engine settled into running great. That is of course, until put under load. Again messing with the governer lever (that connects to the throttle lever on the carb) while the engine was running brought everything back into line. It seems like it wants to push the throttle wide open and then too much fuel causes it to burn rich and I guess since it is not reving up to speed due to the (rich rough running) it keeps the throttle wide open.
I know nothing on how the governor works other than it is between the throttle control lever on the dash and the throttle lever on the carb and that messing with it makes the engine run smoothly again.
What gives and what do I do now?
Thanks,
Dale (dh of mary, tx)