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PostPosted: Wed May 18, 2016 6:59 am 
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Minnow

Joined: Tue Apr 28, 2015 6:56 am
Posts: 10
2006 Four Winns Horizon 200, Volvo Penta 4.3, fuel injected.

On launch day, ran well for about 5 minutes, then started losing power, sputtering, making popping noises, then finally cut out. Had to get towed in.

Mechanic serviced it at the dock, diagnosing possible fuel filter problems. Replaced the fuel filter. Same problem continued to occur.

Mechanic then noticed a crack in the distributor cap and replaced that and all plugs. Same problem has continued to occur.

Mechanic is now thinking there is some other problem with the fuel system, including possibly bad gas. I'm not optimistic about that, as I have a full tank of fresh gas; engine was also professionally winterized and de-winterized. He is going to test it today on an alternative gas tank, with fuel additive. I'm hopeful but cynical.

Has anybody had this problem, and any thoughts on what it might be?

Thanks, all.

Bummed on Lake St. Clair


Last edited by Spartan86 on Wed May 18, 2016 9:41 am, edited 1 time in total.

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PostPosted: Wed May 18, 2016 7:28 am 
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Location: New Carlisle, Ohio
Sounds like it could be an exhaust problem, does it still have the flappers?

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PostPosted: Wed May 18, 2016 7:35 am 
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Minnow

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No flappers


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PostPosted: Wed May 18, 2016 8:21 am 
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Joined: Mon Jun 02, 2014 7:24 pm
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Location: Lake St. Clair USA
What year?

Other owners here have had issues with fuel pumps. I am sure someone will chime in with details on that...

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PostPosted: Wed May 18, 2016 9:13 am 
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268 Vista

Joined: Tue May 16, 2006 9:49 am
Posts: 4989
Location: West Michigan
Has IAC valve been checked ?

VP fuel pumps are a known issue. Costly fix as well.

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PostPosted: Wed May 18, 2016 9:26 am 
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Minnow

Joined: Tue Apr 28, 2015 6:56 am
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2006.

Thanks for the comments.


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PostPosted: Wed May 18, 2016 9:26 am 
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Joined: Fri Apr 24, 2009 7:22 am
Posts: 461
Location: Chicago
Is your motor fuel injected or carburetor ?


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PostPosted: Wed May 18, 2016 9:41 am 
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Minnow

Joined: Tue Apr 28, 2015 6:56 am
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fuel injected


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PostPosted: Wed May 18, 2016 10:58 am 
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Joined: Sat Jul 21, 2012 12:44 am
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Location: Las Vegas, NV
Mine was a fuel pump...sounds like the same issue...but mechanic checked the anti-siphon valve first.

http://www.smwebhead.com/phpBB3/viewtopic.php?f=11&t=10192

good luck, and let us know what the outcome is.

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Chris and Alicia
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1996 Four Winns 238 Vista Dlx 5.8Fi


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PostPosted: Wed May 18, 2016 3:13 pm 
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Joined: Thu Jun 29, 2006 10:26 pm
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Location: Long Island NY
Its always good to rule out the ignition system first, but they did find a crack in the dist. cap, how are the spark plug wires? When was the last time the spark plugs were looked at? You can tell a lot about performance problems from spark plugs appearance.
For the fuel system, I'd also check the fuel system pressure and the anti siphon valve. If the pump and fuel pressure is good and the anti siphon is not sticking, I'd take off the fuel filter and pour fuel in it (carefully) into a clear glass jar and let it sit. Look for debris and a layer of water on the bottom. If the ignition sys checks out, and the fuel system (pump, anti siphon, vent, etc) is OK, then you need to do more troubleshooting with the EFI system itself. Is this a port injection system or a throttle body system? Throttle body is simpler as there are only 2 injectors. One might be clogged, or have a poor spray pattern. Lastly, vaccum leaks can cause similar problems (gasket under throttle body, or intake gaskets themselves). IAC valve also should be checked, but I don't think that would cause quite the same issues.
I'd look at the plugs first actually:
porcelin insulator in the engine appearance...if bleached white....on all....lean fuel mix....weak pump, stuck anti siphon, vent clogged, injectors poor spray pattern...vaccum leak....
if the insulator is black....weak ignition/spark....injectors sticking open (rich fuel mix)...

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PostPosted: Wed May 18, 2016 11:15 pm 
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230 Mike
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Location: Kansas City, Table Rock Lake
How many hours?

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PostPosted: Fri May 20, 2016 6:37 am 
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Minnow

Joined: Tue Apr 28, 2015 6:56 am
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200 hours


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PostPosted: Fri May 20, 2016 6:43 am 
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Minnow

Joined: Tue Apr 28, 2015 6:56 am
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Situation has now been resolved. Mechanic disconnected the fuel lines and found air pockets in the lines. He bled the lines, reconnected them, and it solved the problem. Boat is running great now.

Thanks for all the comments.


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PostPosted: Fri May 20, 2016 8:28 am 
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Location: Lake St. Clair USA
Spartan86 wrote:
Situation has now been resolved. Mechanic disconnected the fuel lines and found air pockets in the lines. He bled the lines, reconnected them, and it solved the problem. Boat is running great now.

Thanks for all the comments.

Awesome and thanks for following up!

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PostPosted: Sun May 22, 2016 11:10 am 
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Location: Southern ohio
I would replace the fuel lines while you are working on it. They are pretty cheap you can do it yourself and good piece of mind. Sometimes the ethanol will eat at the rubber from the inside out it will also cause the inside to weaken and suck itself closed.

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