220 gpu restart issues

[220gpuguy]

I'm having trouble getting my 220 with a holly carb to restart after running it for a while and shutting it off. It'll strain the starter and sound like there's a lot of resistance in the motor. If I wait 15 minutes or so it'll restart better. Anyone else run into this before? Is it a starter, motor, mag, or electrical issue?

[loudmouse]

Try turning the engine over then turning the mags on. Probably the starter but could be flooding from carb after the engine is turned off. Look into the venturi of the carb AFTER you shut it down and if you see smoke (vaporizing fuel) then it's flooding.

[Striker543]

Yes. Thick (very thick) battery cables solved my problem - this is of course assuming the battery and starter are in good shape.

[220gpuguy]

I'll have to look into the carb issue. I plan on rewiring the boat to go to very thick cables in the near future to try and keep everything from heating up

[loudmouse]

Also make sure you have a ground from engine to battery -. I see so many boats trying to ground thru the engine mounts to Riggn to hull to battery. Creates a very weak ground. #4 cable is plenty big enough

[220gpuguy]

That there may be part of it. Rigging is having some rust issues and it's all grounded to the rigging

[Deano]

That there may be part of it. Rigging is having some rust issues and it's all grounded to the rigging

You all but answered your own question here, though you likely didn't realize it.
Not the rust part, but the rigging being used as the Primary Ground.

Also make sure you have a ground from engine to battery . . .

You can this bit of info to the bank.

The biggest load your airboat wiring will ever see is the starter circuit;
consequently your Primary Ground should be on the engine (preferable a starter bolt) and then go from there to the rigging.
It is additionally cheap insurance to also go from the battery ground to the rigging (and preferably a ground block by the dash).
While that may seem redundant, that is also the best way to not have wiring related problems.

In just about any marine related application is seems as though 90% of wiring problems come back to a bad ground.
Any steps taken to prevent that (especially redundancy), will lessen the odds of having such a ground related problem.

[loudmouse]

Also by not grounding back to the battery the boat will be susceptible to back feed and eletrolysis.

[220gpuguy]

Thanks everyone for the help. Looks like I'll be redoing some ground wires this weekend

[Alvinlee1915]

Go with what the people above are saying. I just went through this problem. Starter went out and had to put another on. Grounding was one of the issues. Good preventative measure is too ground the starter too the cage.

[diamondback0320]

I had mine grounded to the cage for years and to the engine case & always seemed to have problems & my rigging is all aluminum..I finally went & had new cables made out of I believe #2 welding cable and have 1 negative to the starter bracket & 1 to the main frame of rigging..not the cage and I'll tell ya haven't had 1 bit of problems thus far

[riverrat1]

What Pistons are in it

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[220gpuguy]

Don't know the piston but I know it's 15 over. Fixed my ground issue and cleaned and regapped the plugs. Runs great now