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Still a winger at heart.
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Discussion Starter · #1 ·
John and I had a younger engine running and quite snappy I might say.

Waited a couple of days for some other parts, and went to start it. Nothing. Checked solenoid, good. Starter, spins fine.

Take the plugs out and put her in gear, wont turn. What would cause it to lock up when it was running fine when we shut it off? Engine temp was appropriate, seemed to be flowing oil ok...

Keep in mind this is an engine that we had the heads off, know what the pistons/cylinders looked like, could spin it by hand without the heads on, did the full clearance check after putting heads and belts on... What I am saying is everything was fine, but now isnt.

Damn gremlins...
 

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Find neutral. With the back wheel off the ground, does the WHEEL turn?
If it turns, it's in the engine. If it doesn't, it's in the trans.
 

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Still a winger at heart.
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Discussion Starter · #3 ·
its in the engine. Did that whole neutral/gear spin the tires things already... just stumped as to why it locked up... it was running fine...
 

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Junior Grue
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Waited a couple of days for some other parts, and went to start it. Nothing. Checked solenoid, good. Starter, spins fine.
Hum, starter spins engine doesn't?
That would suggest starter clutch, internal drive between starter and starter clutch or the reduction drive on the output end of the starter.
 

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Honda Guru
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Not knowing everything you've done…. I'd pull the belt covers and try to turn it over (without spark plugs, of course) by turning it at the crank bolt.

After that…. I'd pull the heads back off and try again. I'm guessing maybe a valve wasn't adjusted/shimmed and let loose when it was shut down. That's just a SWAG.
 

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Still a winger at heart.
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Discussion Starter · #6 ·
yeah, will pull the belt cover and see what I see from there...

this is disappointing... I sure could do with a break. Man these last few months...
 

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Discussion Starter · #7 ·
Not stuck. Pulled the rad and the belt covers, it turns beautifully with a socket on the crank bolt.

A substantial amount of fuel leaked out of the left head exhaust, though.

confused...
 

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Honda Guru
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Now it's sounding like hydrolock cylinder(s)…. maybe a stuck float valve???

But…. pulling the plugs out should have released the hydrolock then starter should have spun the engine and allowed it to turn over.

Hummmm…..???
 

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Still a winger at heart.
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Discussion Starter · #10 ·
Dennis, I had this motor apart, looked in the cylinders, and operated it by hand. I didnt see any hydro damage, nor did John.

Had it running, too. Shut it off, and no start...
 

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The lock is actually a fuel lock. Stuck float or needle drains fuel into the motor. If the exhaust valve happens to be closed it can keep the engine from turning. If the intake valve is close, the fuel can back up into the intake tubes.
Like this.
 

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I've gotten a little confused.
I know it ran.
Then it wouldn't turn over because the engine was stuck.
You said the starter spun free.
I don't understand how the starter can spin free, if the engine is stuck.
Did you take the starter out and check it, or is the problem that when the starter spins, the engine doesn't turn?
Everybody can't be right. With the plugs out, hydro-lock isn't a valid reason.
Clear this up for us......
 

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Discussion Starter · #13 ·
I did remove the starter, so it spun free.

while off, I pulled the rad and timing belt covers, plugs out, engine spins fine.

fuel leaking out of one head, probably one stuck float.

Still not sure it wouldnt turn over though.
 

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If a cylinder had more than a couple ounces of gas in it from a leaking carb it will lock the engine solid because you can't compress gas. When you finally got it to turn it's most likely the gas had leaked out. If you turned the engine backwards it would have let the fuel out of the cylinder. I'm betting you left the petcock open?
 
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