B & s 6 hp

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  #1  
Old 11-20-20, 05:25 PM
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B & s 6 hp

I have a brand new never even had gas in it before 6 HP B&S motor that I installed on my Trac Vac.
Filled it with oil and gas and the cord is near impossible to pull.
I removed the spark plug and it pulls over easy.
I'm 100% sure the oil is not over filled.
Thinking the float in the carb. may be stuck and it flooded it I removed the plug and smelled it and there was no smell, also as I pulled it over I held a paper towel near the hole and nothing came out.
Removed the bowl and the float does shut off when raised.
Any ideas on what to check?
 
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Old 11-20-20, 11:56 PM
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Check the valve clearances. Is it still under warranty?
 
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Old 11-21-20, 05:52 AM
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Is there a shut off valve in the gas line? It could be closed.
 
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Old 11-21-20, 06:06 AM
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If you aren't getting a smell of gas when you removed the plug and the float in the carb stopped the fuel when lifted it probably is not flooding. Have you been choking the engine when you attempt starting?

What is the model number? I wonder if the compression release is stuck.
 
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Old 11-21-20, 08:37 AM
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There is a fuel shut off and it's on, and yes it's choke but that has noting to do with the issue.
I can not even pull the cord to try and get it started.
I bought it over a year ago on Amazon to have as a spare for my Trac Vac since that's how I make my living in the fall cleaning up leaves, so it's out of warranty.
This is what it looks like.
https://www.northerntool.com/shop/to...8525_200578525
Just a guess, I'm picturing an exhaust valve is stuck closed.
If I removed the OHV cover can I see if the valves are moving?
I was thinking of shooting in some ATF to see if it unfreeze it.
 
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Old 11-21-20, 09:09 AM
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I'm not disagreeing with a stuck valve because that makes perfectly good sense, except that, unless it has hydraulic lifters, which I can't imagine, and one is fully collapsed, I can't see how it could turn even with the spark plug out. Probably no way to see the valves without a scope, but wondering if you might be able to feel anything with a bent wire through the plug hole?
 
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Old 11-21-20, 09:16 AM
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Yes, you can observe valve operation with the valve cover removed. Your first post said the engine was nearly impossible to rotate. Your last post said it was impossible to rotate. If either valve was stuck and the engine rotated, something got damaged. Am I understanding you correctly?
 
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Old 11-22-20, 04:11 PM
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Sort of an update.
I took the whole motor and Trac Vac to the home of the head mechanic of my local equipment dealer that does work for me on the side.
He called today and told me there was oil on the top side of the piston.
I've seen this before on push mowers if someone lays it on it's side the wrong way.
This engine was brand new, there was no oil or gas in it.
It was installed and filled with oil and gas with it sitting up right.
It's never been ran.
When I removed the spark plug and pulled it over nothing came out, there was 0 oil on the plug.
 
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Old 11-22-20, 06:12 PM
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How sure were you that it was a brand new unit and not reburb or used unit?
 
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Old 11-22-20, 10:29 PM
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Oil on the piston makes sense and was what I originally suspected except for not seeing any come out with the plug or when pulling it without the plug.
 
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Old 11-23-20, 11:17 AM
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I'm 100% sure it was brand new.
I agree Cheese, if there was that much oil in the cyl. it should have shot out when I pulled it over without the plug, but nothing came out.
Where just letting it sit a few days hoping that what went up will go back down into the crankcase.
 
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