Question about Craftsman 42 in. Deck 19.5hp Lawn Tractor
Hi and welcome to FixYa. I am Kelly. Your oil rings are most likely stuck against the piston skirt. This can happen if the engine overheats or the engine oil is not being changed at the recommended intervals.
There is a couple of ways to try and free them up without an engine tear down. The first way is to use a 30W detergent oil vs a 30 SAE oil. Drain the engine and add detergent oil. after 5 to 10 hours of use do it again. The go back to regular 30W SAE oil. Detergent oil will make the aluminum crankcase appear internally polished if it is working / cleaning things up.
The second way is to over drain the oil and then fill the engine up as best you can i.e over-servicing big time with engine flush. Make sure an OLD spark plug is installed. Turn it thru a few times by hand and let it sit over night. Next day drain engine flush service with DETERGENT oil for at least a 5 hour operating interval and then change oil back to 30W SAE oil. If your in a hot environment it is recommended that you always use Detergent oil.
Pennzoil HD30 = detergent oil (Example only) Use any brand 30W detergent oil.
If the above does not lessen the oil blow by then the only option at that point would be to change the piston rings / inspect cylinder bore wear. I would not give up on this engine. B & S parts are available for your engine.
I have brought a lot of engines back to life by simply doing rapid interval detergent oil changes.
A few others took the engine flush soaking to get them to snap out of it... Of course there are some that have over-heated so badly there is no hope other than parts changes. I don't think your engine is to that point yet.
Just an note... if you need help with parts info I will need your ENGINE model number that is on stamped on the air shroud and or the block data plate.
Thanks for choosing FixYa.
Posted on Sep 17, 2010
Kelly's was a good response ... Thanks Kelly and thanks Iruggier for your interest in FixYa.com
Posted on Sep 17, 2010
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Posted on Jan 02, 2017
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