051 Stihl problem ????

[379 pete]

Hi, I just picked up a really nice 051 Stihl, all original and runs real good. The problem is when it sits unused for a while Oil from the chain oil tank finds it way into the crankcase and past the piston, and locks the engine, remove the spark plug, drain it out and it starts and runs fine. Seems to run too good to be a blown case gasket. Has anyone encountered a case where the oil pump or some seal can do this???? I talked to a guy that had the same problem on an 075, He said he just stored it with the bar pointing down and never looked for the problem. This is such a nice old saw, I want to fix it right. Any suggestions ????? Thanks/379 Pete

 

[stihlboy]

look for a hole in the tank is my thought... wierd though it goes into the top of the cylinder???? almost seems like your oil tank is pressurized..... not sure on the cause but im sure someone will know what to do:greenchainsaw:

 

[Lakeside53]

Na.. it's usually just pump seals.... replace them all.

 

[379 pete]

That sounds like I will try that first. Wonder if the parts are available from Stihl??? Thanks/379 Pete

 

[Lakeside53]

Yep... they are. The big rubber sleeve is what usally leaks.

 

[379 pete]

Well, I will pull up my parts book and write down some numbers, go ask the bank for a loan, then go see the Stihl dealer. Thanks/379 Pete

 

[stihlboy]

Well, I will pull up my parts book and write down some numbers, go ask the bank for a loan, then go see the Stihl dealer. Thanks/379 Pete

:agree2: :agree2: :agree2: :agree2: :agree2: :agree2:

 

[Lakeside53]

Be carefull... there are two different "rings" 1111 648 9000 and 1111 647 9001. Most take the 9001 ($12.50), but...

Make sure your dealer reads the tech note 03.1978.... (I don't have a copy with me at home..).

 

[379 pete]

Ya, I see the difference in the book, I better take the serial number too. Thanks for the help, you seem very well informed on Stihls/379 Pete

 

[Lakeside53]

I'm just:greenchainsaw: a good guesser