QuestionQUESTION:
My Electrolux rider mower is equipped with a B&S 14.5 HP I/C Series Model 282H07, Typ 0239E1, Code 040123ZE.
It runs fine in idle (at idle speed and at higher revs) as long as there is no load. when more power is needed for driving or when the deck is put on, the engine starts to "cough" and sometimes fires out of the exhaust. In this condition, the lever arm of the governor moves back and forth all the time.
I have changed the spark plug, Magneto, fuel filter, cleaned the air filter and the carb (Nikki), made sure the carb is not drawing air through the flange seals. Still the same.
I had disconnected the governor arm from the gas butterfly and adjusted the gas manually. Still the same.
Have no more good idea what to do.
Although I don't believe this is the problem, I would be interested to understand how the governor works at all. I don't understand it from looking in the spare parts drawings.
Sorry for my limited English I'm writing from Germany.
ANSWER: As the governor spins, centrifugal force sends the weights moving which moves the governor rod back and forth.
The paper air filter can't be cleaned it has to be replaced. Is there any smoking at all? When you pulled the old plug, how did it look? What color was it and were there any deposits on it? Thanks, PK.
---------- FOLLOW-UP ----------
QUESTION: There is no excessive smoke. When the engine "coughs", there is some white smoke.
After the engine was running in the bad state for half a minute, the plug is black and wet. Have cleaned it repeatedly. The old plug looked the same. Black with soot, but no hard deposits.
I have done test runs with and without the paper air filter. All the same.
Meanwhile I have checked and readjusted the valve clearance according to the B&S specification. Did not make it any better.
AnswerThe spark plug is id'ing the problem. The black deposits indicates it's running rich. This particular model of carburetor is one we have a great deal of trouble out of and replace 100% of the time when it starts causing trouble. It's allowing too much fuel to flow and this causes the loss of power. The excess fuel doesn't burn in the chamber and explodes when it hits the hot muffler causing the afterfire.
You should monitor your oil very closely and smell it for gas as this carburetor and it's Walbro cousin have a bad habit of filling the crankcase with gas. This results in a thrown rod.
You can try rebuilding, but the kit is fairly expensive and the carburetor has to be soaked to be cleaned. Our success rate is less than 50% on these carbs so I decided to not mess with them anymore and now replace them. Let me know if you have any questions. Thanks, PK.
