www.iFourWinns.com

I poured the gas from the jar into another container to analyze the sediment. At first it seemed like it was sand. At that point I thought I would definitely need the gas filtered and the tank flushed. But I noticed that the grit disappeared when rubbed between my fingers. So it can be broken down. I spoke to the head of the service department in my marina. I showed him the grit and I mentioned the tank cleaner. He said to keep changing the filters. So I put 20oz of the tank cleaner into the 75 gal of gas in my tank. I let it sit for 24 hrs. The next day I put a new filter on and it started right up. I let it run for an hour. Ran it for another hour the next day on the same filter. I will do the same tomorrow. Then on Tuesday I will change the filter and run it on the open water. I picked up extra filters online that were on sale for less than $6 each. I will change the filter and check for sediment after each trip out. I also believe the tank should be topped off as much as possible and kept stabilized with Startron. I'm going to continue using the tank cleaner after each fill up. But the big test will be bringing the RPM's up out on the water. So I will always have extra filters and a small gas can to prime the filters on hand.

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Todd
1999 258 Vista
Volvo Penta 5.7 GSI
DP-SM

Sounds like you got the problem figured out that is great! Let us know when you hit the RPM'S how everything went.

You are correct in keeping the tank topped up, by having the filters available, and changed frequently you will remove the sediment, and the star tron will help to prevent the new fuel from doin the same and minimize the effects of the old.

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2000 H190 5.0GL

Today was the first time I took the boat out since mid July. Since then I have been running the engine at the dock. Maybe 6 six times. Starts right up every time. Runs smooth without a hiccup. After clearing the marina I took it up to 3000 rpm's. Stalled within a minute. I took the filter off and poured the gas into a jar. Nice and clean. Put a new primed filter on. Started up but the high pressure pump was whining for almost a minute then quieted down. Made my way back to the dock at idle speed. I'm starting to think that air is entering somewhere at high throttle. Both pumps are new. I can't see them being faulty. No trouble codes. The high pressure pump certainly was a pain in the ass to change. Why mount it there? I never did like working on rigid fuel lines and connections. They haven't changed in so many years. I honestly think they cause more safety problems. There is a flexible line from the low pressure pump to the connection before the HP pump. Are rigid lines necessary? I seem to be going off topic. I just think that using flare nut wrenches on weak fuel line connections should be history. Maybe the air is entering there. Anyway, I'm back to square one. Deck on the water. At least I know I can cruise at idle speed to my winter storage area when necessary .

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Todd
1999 258 Vista
Volvo Penta 5.7 GSI
DP-SM

I went back in the rest of the posts and tried to find what else you had replaced. One thing that caused trouble on my old boat was the anti siphon valve. This is a spring loaded valve required on inboards and it keeps gas from siphoning into the bilge if the line from the tank to the fuel filter ruptures.

We bought our boat back in 2002, it was OK for the first season. The next season the engine would not plane out the boat. I went through the ignition system, didn't find problems there and as far as I could see the carb and accelerator pump were OK. Took it to the mechanic and it turns out that it was the anti siphon valve being corroded shut. It would allow enough gas for the boat to idle and rev in neutral but not to plane the boat. Since it was replaced it has run fine. That was back in 2004.....

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88 Four Winns 200 Horizon
4.3 OMC Cobra-4bbl
2002 Walker Bay 10/2012 Suzuki 2.5
2008 Walker Bay 8

1998 Jeep Grand Cherokee 4.0/Selectrac
2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II

I was tempted to change the anti-siphon valve. But my fuel filter always has gas in it. So you would think that's not the problem. I guess it couldn't hurt to change it. Thanks

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Todd
1999 258 Vista
Volvo Penta 5.7 GSI
DP-SM