220 gpu won’t start???

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Pcairboater
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220 gpu won’t start???

Postby Pcairboater » Thu Apr 11, 2019 9:43 pm

Just looking for some advice on my 220 gpu... I just bought this airboat and fairly new to ground power units. I’ve been doing some rewiring due to the fact when I bought it the guy had everything apart. I’ve come to the point where I have spark and fuel but I’m not able to get the motor to fire. Am I using the wrong spark plugs or missing something. I’m about to take it to a shop just looking for some advise before I spend a ton of money to have someone work on it. It has a Holley 4150 that maybe be out of adjustment also. :rebel: :banghead:

diesel250rr
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Re: 220 gpu won’t start???

Postby diesel250rr » Thu Apr 11, 2019 9:55 pm

Timing or compression if you have fuel air and spark

GMAC 76
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Re: 220 gpu won’t start???

Postby GMAC 76 » Fri Apr 12, 2019 10:21 am

I agree with diesel250….if ya have fuel, air, spark and compression and it wont fire I would look at the engine/magneto timing

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southern safaris
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Re: 220 gpu won’t start???

Postby southern safaris » Fri Apr 12, 2019 11:51 am

GMAC 76 wrote:I agree with diesel250….if ya have fuel, air, spark and compression and it wont fire I would look at the engine/magneto timing


X3 on mag timing.... is it sputtering or coughing at all,any signs of a heartbeat?
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John Fenner
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Re: 220 gpu won’t start???

Postby John Fenner » Fri Apr 12, 2019 12:32 pm

Make sure mag is off, "grounded" pull prop through by hand, if you don't hear a click at each compression stroke, the impulse coupler spring is broken.
I never finish anyth,,,.

Pcairboater
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Re: 220 gpu won’t start???

Postby Pcairboater » Sun Apr 14, 2019 6:48 pm

It has spit and sputtered trying to fire up on its own but it won’t keep the heartbeat... southern safaris. I’m taking it to someone this week to see if it’s a timing issue. I don’t even wanna try to mess with timing myself. Thank you guys


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