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Author Topic: Honda gx390 problem  (Read 644 times)

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Offline Kbeitz

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Re: Honda gx390 problem
« Reply #20 on: November 01, 2017, 08:34:00 am »
The 2 lugs on the starter is the starters solenoid. That's nothing more than a heavy duty switch.
Inside the solenoid is an electric magnet that pushes a solid copper bar up tight against the
two large bolts making like a big switch.



So the first thing I would do is to jump with a large screwdriver across the two large bolts.
Take care because the engine should try to start.

Then If this does nothing run a jumper from the pos. on the battery to the big bolt on the
solenoid that has the wire going into the starter. Something should happen.

If nothing then check for lost ground. Run a jumper from the Neg. on your battery to the
body of your engine and try starting.

If none of this works you probably need a starter. Use a heavy wire when jumping.
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Offline Bigmikessmallen

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Re: Honda gx390 problem
« Reply #21 on: November 06, 2017, 12:39:29 pm »
So all my grounds are good. I took the plug out today to see if theres spark just to make sure 100% and there is. The machine without the plug in turns of amazing full power to the starter as soon as i put the plug back in the juice to the starter drops 98% and will barely turn over.

Offline btulloh

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Re: Honda gx390 problem
« Reply #22 on: November 06, 2017, 03:53:12 pm »
Sounding more like valve adjustment.  Hard to believe valve lash can have that much impact until it happened to me a couple times.

Offline starmac

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Re: Honda gx390 problem
« Reply #23 on: November 06, 2017, 05:52:36 pm »
One other thing to check as far as grounds go. The starter grounds to the engine where it is bolted and mated up, I have run across them where it has corrosion between the starter housing and the block itself, causing slow problems. I would not discount the valve clearance if these do actually have an automatic compression release, the starter will be built to use the comp release and will never turn it as fast without it working. Kind of like the old small cam cummins.
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