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Max Online: 36273 @ 01/23/13 02:34 PM
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#11603511 - 05/14/16 10:01 PM Yamaha question
StormVet Online   content
Outdoorsman

Registered: 01/16/12
Posts: 156
Loc: East Texas
Been noticing my 88 Yamaha pro v 150 carbed motor cutting out a lot lately. This week it started cutting out while running the lake to some favorite spots. About 2/3 throttle it would pick up then slow down a little then repeat the whole way. Today it had a hard time getting on plane. It did the first 2 throttle ups. Then I the third it wouldn't break plane. You could here the motors rpms go up but boat was bogging down. The motor died then would not crank. Trolled back to the ramp and trailered the boat. Then we found the battery ground cable has a break in it cable before the battery ground terminal. Now my question. Can a bad battery ground cable cause all these issues.

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#11643349 - 06/02/16 05:49 PM Re: Yamaha question [Re: StormVet]
onfirecrappie Offline
Outdoorsman

Registered: 02/12/13
Posts: 246
Loc: Gunter,Texas
Doesn't sound electrical to me. Sounds like fuel system. But I'm no mechanic.

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#11643493 - 06/02/16 07:05 PM Re: Yamaha question [Re: StormVet]
militarybrat Offline
Extreme Angler

Registered: 06/02/11
Posts: 2636
Loc: dalllas texas
Yes the break or it breaking all the way can shut it down. As it is breaking you will get intermitent power along with low power causing coils not to fire. Fix the ground first, fire it up on the muffs run it if it runs good take it out and see. Keep it simple as what you have posted looks like a fuel issue also (not saying it is). One thing at a time.
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#11643605 - 06/02/16 07:56 PM Re: Yamaha question [Re: StormVet]
Freeman Clark Offline
Extreme Angler

Registered: 03/18/05
Posts: 1343
Loc: Temple, Texas
+1 one on one thing at a time.Bet it is in the fuel.Let us know what you find.

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#11650645 - 06/06/16 04:48 PM Re: Yamaha question [Re: StormVet]
gary purdy Offline
TFF Guru

Registered: 05/24/03
Posts: 11040
Loc: Littlefield Tx & Lake A. H. US...
Manual fuelpump diaphragms.
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#11650830 - 06/06/16 06:21 PM Re: Yamaha question [Re: StormVet]
bronco71 Online   content
Extreme Angler

Registered: 02/05/06
Posts: 1116
Loc: Farmers Branch/Sulphur Bluff
Take someone else with you and have them slowly and SAFELY pump the fuel bulb when it is acting up, if it fixes the problem check for bad fuel filter and then fuel pump.

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#11654059 - 06/08/16 09:14 AM Re: Yamaha question [Re: StormVet]
blondie Offline
Outdoorsman

Registered: 07/20/10
Posts: 163
Loc: LUBBOCK TEXAS
If you have not replaced the fuel line and bulb you might as well replace it. That ethanol will ruin the line and bulb.

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#11654401 - 06/08/16 11:23 AM Re: Yamaha question [Re: StormVet]
chikenfrie Offline
Extreme Angler

Registered: 02/11/09
Posts: 2459
Loc: Double Oak
I'm kinda having the same issue, got out over the weekend and noticed my boat having trouble getting on plane but did. After that it wouldn't even get close to plane but still idled and ran fine at low speeds. I'm assuming it's a fuel delivery issue since my motor didn't rev quite like normal at WOT. Have you checked you prop hub? Maybe it's spun and needs to be replaced.
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#11654414 - 06/08/16 11:27 AM Re: Yamaha question [Re: StormVet]
bronco71 Online   content
Extreme Angler

Registered: 02/05/06
Posts: 1116
Loc: Farmers Branch/Sulphur Bluff
Not too sure it would be the hub, when mine spun the engine revved up really high like it was cavitating

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#11657487 - 06/09/16 03:59 PM Re: Yamaha question [Re: StormVet]
JZA Offline
Outdoorsman

Registered: 03/17/10
Posts: 111
Loc: Fritch, TX
My 06 vmax was doing the same thing last year. At first it would cut out when given about half throttle but run ok at lower speeds. It slowly got worse. I ended up finding that the carbs were gunked up. Pulled, stripped down, cleaned, and reinstalled them. It ran like brand new after that. It took a couple of hours but wasn't as hard as I thought it was going to be. I was able to go back with the same gaskets though.

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#11663600 - 06/13/16 08:14 AM Re: Yamaha question [Re: StormVet]
chikenfrie Offline
Extreme Angler

Registered: 02/11/09
Posts: 2459
Loc: Double Oak
Hey Stormvet, you get you issue figured out?
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