Re: questions on my '41H

Posted by Theman on August 02, 2005 at 10:58:43 from (65.248.77.5):

In Reply to: questions on my '41H posted by awutay on July 31, 2005 at 19:29:55:

The puffs are indeed oil and are not related to tweaking on the carb. Here are some things to check to see where you're getting the oil from. he first and easiest is the air cleaner. Pull the tube off at the carburetor and see if the air supply pipe is oily. Start the engine and watch the exhaust.

If it still puffs smoke, ground out one spark plug at a time to isolate which cylinder is the culprit.

Another place oil can get in the engine is through the valve stems. The intake and exhaust rocker arms are made differently. One will oil the stem (exhaust) and the other has a bevelled top edge so the oil will drip off the rocker before it can get on the stem. You will have to pull the valve cover to check this. It is possible you are getting an occasional drop of oil on an intake valve stem. Having recently assembled the engine makes this the most likely cause.

The last place it can get in the combustion chamber is past the rings. Normally, this causes the engine to smoke continuously. However, if the other areas have been checked, check the rings and make sure nothing is broken and that the gaps are staggered around the piston.

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