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Onan powered Bolens suddenly won't start.


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#1 Philstevens OFFLINE  

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Posted February 04, 2015 - 12:48 PM

i have a Bolens that is powered by a 2 cyl Onan. I made this tractor to just blow snow and it has been working fine

until yesterday when I went to start it and it won't start. I'm going to buy a compression tester this afternoon and

check out both cylinders. I have spark,fuel and even tried starting fluid. No luck.does anyone know if the valve guides

on an Onan are problems? This thing was running real strong and now nothing.

Thanks  Phil



#2 Rock farmer OFFLINE  

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Posted February 04, 2015 - 07:10 PM

Welcome to Gttalk!
Yes Onan engines have been know to have valve seat problems.
But, usually just one cylinder at a time.
The engine would stil run, just at reduced power.
I'd suspect a timing issue. Or, lack of spark.
How did it fail. And, how did you test it?

And where abouts in Mass are you?

Joe
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#3 Philstevens OFFLINE  

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Posted February 05, 2015 - 04:17 PM

Joe,

  The tractor just wouldn't start after blowing snow for an hour in the morning.

I'd like to thank all the members for their ideas. I tried everything I could think of

except for checking compression. Bingo!! Very little in both cylinders. I pulled one head 

this morning and put that cyl.on TDC and I was able to turn the intake valve by 

just pressing on the head of the valve and twisting with my thumb.I took the lifter

covers off and reset the valves and it started right up. I guess I'll have to keep an

eye on this before snow fall next year.

  I live in Essex MA. and have seven other Bolens tractors. One I've had for about

twenty years and that started me collecting them for spare parts. My wife says that

I have enough so I'll be going to Eliot to the tractor show next summer to try to

reduce my stock of tractors.

 

Thanks again everyone

 

Phil Stevens


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#4 MH81 ONLINE  

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Posted February 05, 2015 - 06:38 PM

Glad you found the issue and it wasn't serious. Do you have a picture?
:welcometogttalk:

Btw, I made this its own thread, thought it would get more traffic that way.

#5 KennyP ONLINE  

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Posted February 05, 2015 - 06:58 PM

Glad you figured it out! I was kinda wondering if something like that could be an issue!



#6 Rock farmer OFFLINE  

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Posted February 05, 2015 - 07:27 PM

Phil,
Those Onan's have aluminum blocks and hardened steel inserts for the valve seats.
Sometimes the seats get pounded down into the block. And, sometimes they just become loose!
Sounds like you got lucky! But, you want to keep an eye on that.
What model of Bolens do you have? I have three large frames, an 1886, a HT 20, and a HT 23 with a loader.
Only the loader is running. I've been using it to move snow, snow and more snow!
I just picked up the 1886 in Rowley. I always go to the Eliot show. It's in my backyard!

Joe

#7 Philstevens OFFLINE  

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Posted February 05, 2015 - 08:36 PM

[Joe

  This is what I've created.

 

Phil

Attached Thumbnails

  • 1666 snowblower.jpg

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#8 MH81 ONLINE  

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Posted February 05, 2015 - 09:00 PM

Looks like a very capable machine.
Bet that Onan tosses the white stuff.




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