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B&S 11hp won't start


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#1 robert_p43 OFFLINE  

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Posted May 08, 2016 - 06:51 PM

I bought a old snapper RER. Model 28085s  That model looks like it should have an 8hp on it bou doesnt.

It Has a B%S model 252707  type 0638-01.  11 hp vertical shaft.

The man said it would run but it had no spark when I got it home. After tracing and cleaning up wires and cleaning the flywheel and coil, I do get spark now. I am not sure what the specs are for the coil gap.

I guess the carb would be my next step but no nothing about this engine. If I try spraying into the carb, I get nothing.

Any Ideas for me?  And can anyone point me to any manuals that covers this engine?

Thank You,

Robert

 


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#2 Bruce Dorsi OFFLINE  

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Posted May 08, 2016 - 07:17 PM

 I am not sure what the specs are for the coil gap.

 

  And can anyone point me to any manuals that covers this engine?

 

Coil gap is .010"-.014"

 

Repair manual for your engine:

http://gardentractor...singles-270962/


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#3 larrybl ONLINE  

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Posted May 08, 2016 - 09:16 PM

I fold a regular sheet of paper in half and slip it between the coil and flywheel. 


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#4 boyscout862 ONLINE  

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Posted May 09, 2016 - 06:10 AM

We have excellant B&S Manuals in our Manuals Section. You can download the Repairmans Manual(its free) and learn everything about the engine. Start in the "Troubleshooting Section". Good Luck, Rick

 

BTW one thing that sometimes happens is that a valve sticks. To cure that, pull the spark plug, spray some WD40 in through the hole, and use a bent wire to push the valve closed. Spin the engine and check if the valve is stuck open. If it is, push it down with the wire again. Repeat this until the valve does not stick anymore.


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#5 robert_p43 OFFLINE  

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Posted May 09, 2016 - 08:31 AM

i think I should check for a stuck valve before pulling the carb.  I had forgot about that but that was a problem with that old 10 hp Tecumseh on my 67 sears suburban when I first got it.


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#6 boyscout862 ONLINE  

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Posted May 09, 2016 - 08:35 AM

i think I should check for a stuck valve before pulling the carb.  I had forgot about that but that was a problem with that old 10 hp Tecumseh on my 67 sears suburban when I first got it.

A good habit when putting an engine away for awhile is to turn the engine until you feel compression building. At that point both valves are closed. It tends to minimize valves sticking. Using Marvel Mystery Oil in your gas helps too. Good Luck, Rick


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#7 robert_p43 OFFLINE  

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Posted May 12, 2016 - 07:21 PM

It didnt have a stuck valve but the carb sure was dirty. It runs!  wooo hoooo

And I now have more confidence working with carburators.






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