220 gpu restart issues

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220gpuguy
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220 gpu restart issues

Post by 220gpuguy » Wed Jan 24, 2018 7:58 am

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
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Re: 220 gpu restart issues

Post by loudmouse » Wed Jan 24, 2018 8:17 am

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.
15' Alumitech deckover LSX TT Oxbox 84" JX 4-blade
Gas required Water optional :dontknow:
Built and Tuned by Me
14'X8' JW, Chevrolet 122CID LNF Turbo Engine, Ox box, 80" NGR 3 blade

Life is short, eat your dessert first! :downtown:

Striker543
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Re: 220 gpu restart issues

Post by Striker543 » Wed Jan 24, 2018 8:22 am

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

220gpuguy
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Re: 220 gpu restart issues

Post by 220gpuguy » Wed Jan 24, 2018 8:42 am

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
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Re: 220 gpu restart issues

Post by loudmouse » Wed Jan 24, 2018 8:49 am

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
15' Alumitech deckover LSX TT Oxbox 84" JX 4-blade
Gas required Water optional :dontknow:
Built and Tuned by Me
14'X8' JW, Chevrolet 122CID LNF Turbo Engine, Ox box, 80" NGR 3 blade

Life is short, eat your dessert first! :downtown:

220gpuguy
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Location: Melbourne, FL

Re: 220 gpu restart issues

Post by 220gpuguy » Wed Jan 24, 2018 9:21 am

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

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Deano
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Re: 220 gpu restart issues

Post by Deano » Wed Jan 24, 2018 12:33 pm

220gpuguy wrote: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.
loudmouse wrote: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.
"The suppression of uncomfortable ideas may be common in religion and politics,
but it is not the path to knowledge; it has no place in the endeavor of science."
- Carl Sagan

loudmouse
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Re: 220 gpu restart issues

Post by loudmouse » Wed Jan 24, 2018 12:50 pm

Also by not grounding back to the battery the boat will be susceptible to back feed and eletrolysis.
15' Alumitech deckover LSX TT Oxbox 84" JX 4-blade
Gas required Water optional :dontknow:
Built and Tuned by Me
14'X8' JW, Chevrolet 122CID LNF Turbo Engine, Ox box, 80" NGR 3 blade

Life is short, eat your dessert first! :downtown:

220gpuguy
Southern Airboat Member
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Joined: Fri Nov 17, 2017 11:15 am
Location: Melbourne, FL

Re: 220 gpu restart issues

Post by 220gpuguy » Wed Jan 24, 2018 3:58 pm

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

Alvinlee1915
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Re: 220 gpu restart issues

Post by Alvinlee1915 » Wed Jan 24, 2018 9:34 pm

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
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Re: 220 gpu restart issues

Post by diamondback0320 » Thu Jan 25, 2018 8:05 am

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

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riverrat1
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Re: 220 gpu restart issues

Post by riverrat1 » Mon Feb 05, 2018 7:34 pm

What Pistons are in it

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220gpuguy
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Re: 220 gpu restart issues

Post by 220gpuguy » Mon Feb 05, 2018 9:05 pm

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

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