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Fuel starving on 2000 mariner 350

GAS engine, transmission and generator repair and maintenance discussion forum.
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Bobh
Scurvy Dog
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Joined: June 4th, 2015, 10:59 pm
Vessel Info: 2000 mariner 350

Fuel starving on 2000 mariner 350

Postby Bobh » June 4th, 2015, 11:52 pm

just put boat in for the season. It started up fine. Went for ride. When started again starboard engine stalled. Seemed liked it flooded. Started again but now continues to stall even when idle. Checked fuel pressure on this engine and its lower by 15lbs than other engine. Reves high in neutral fine. Any suggestions.

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waybomb
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Posts: 1921
Joined: February 5th, 2013, 9:24 pm
Vessel Info: 1987 3697 Carver Mariner
1988 Cougar 46 Kevlar Vee offshore
1969 15' Glaspar / 1969 Johnson Electrmatic 85
1964 Barron Flat bottom drag boat
A couple of dinghies
Location: Saint Joseph and Trenton, MI
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Re: Fuel starving on 2000 mariner 350

Postby waybomb » June 5th, 2015, 12:14 pm

If your filters are fresh, then I'd check the fuel tank vent (bugs like to build nests in them), Try switching to the other tank or remove the filler cap from the feeding tank. If problem goes away, then look at the tank vent.

Next I'd check the anti-siphon valves for crud or sticking.
The antiisiphon valves are check valves located on or very close to the fuel tank. There is a very light spring that pushes a ball toward the fuel tank side of the valve. The idea is that if a fuel line were to rupture in the bilge where fule lines usually are, the break could cause the entire tank of fuel to be siphoned into the bilge. The light spring prevents this from occuring. This ball is pulled away from its seat when the engine is running by the suction of the fuel pump. It be stuck in place limiting fuel flow. The valve could be stand alone, or it may be built into the hose connection your fuel line connects to.

Let us know if any of that helps.
Thanks
Fred
1964 Barron Flatbottom with BBC Chevy
1969 Glaspar Avalon /1969 Johnson Electromatic 85
1987 Carver Mariner
1988 Cougar Kevlar 46' with triple blown 572s
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Past - 1988 2807, 1989 4207 Aft
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After Taxes
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Posts: 84
Joined: September 21st, 2014, 9:55 am
Vessel Info: 'After Taxes'
2004 Carver Mariner 360
Lake Simcoe & Georgian Bay,
Ontario, Canada
Location: Lake Simcoe Marina
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Re: Fuel starving on 2000 mariner 350

Postby After Taxes » June 9th, 2015, 12:37 pm

Specify engine; carb or FI.
2004 Carver Mariner 360
MerCruiser MX 6.2
Lake Simcoe, Ontario

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