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windseafire

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Posts: 14
Reply with quote  #1 
Would appreciate help identifying the cause. I hadn't used the engine for about 4 months and it would not start. Tracked the problem down to the priming bulb which was letting in air. Changed the bulb, primed it and it started straight away. As usual though the bulb would not prime to the point I could feel pressure.

Took it out on the water and it stalled after about 5 mins. Would then only run for about 5 seconds before stopping and now will not start at all. Strange thing though, the priming bulb now pumps up hard. No idea iif this is linked in some way.

Any ideas anyone?
Nordmann

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Reply with quote  #2 
Could be a few different reasons. Stuck high pressure pump, stuck VST valve. Some after market primer bulbs are cheap, and sometimes assembled with valves reversed. 

Remove filter cover from low pressure pump, black with large slotted screw. Try priming and if fuel spill out, problem is likely engine fuel system, if no fuel: delivery system tank to engine.

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windseafire

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Reply with quote  #3 
Fuel comes out of the low pressure pump cover when I prime. I did try again after leaving it for a few hours and it ran again for about four seconds then stopped and would then not start at all.
olypopper

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Reply with quote  #4 
Check spark, compression and fuel pressure.  
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windseafire

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Reply with quote  #5 
Unfortunately I don't have a gauge for che king fuel pressure and Barnacle Bill's is closed until the 17th as they are at the Evinrude conference and my evinrude service shop is booked until the 27th, meanwhile I am missing the dungness crab season on the west coast, so hoping a little more info might enable an experienced guess at the problem.

What seems to happen is the longer I leave the engine the longer it will run for. Also when it stops it just stops dead. I tried something I found on a Google search which was to pump up the fuel bulb hard, turn it over, pump again and try again. It did start but kept faltering to idle then revving, falter, rev for about 15 seconds before dying. I didn't try again for fear of damaging something. Does anyone recognize these symptoms?
PhilH12

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Reply with quote  #6 
I'm no expert, but I'd be looking at the pressure out of the HP pump - as the guys have mentioned above.

Yours "may" be close to done, where it may spin for those few seconds and then pretty much seize up until it gets cooled again.

Phil

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20' Weeres fishing pontoon
90 HP E-Tec E90DPLSUM  05184332
Lake Tawakoni, TX - Catfish Capital of Texas
PhilH12

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Reply with quote  #7 
PS - any automotive style pressure gauge like 0 -30 psi should be able to be "adapted" into either the schrader type valve on the pump (if you have that), or "T" it into the fuel line coming out of the pump.  There's gotta be a NAPA, AutoZone, O'Reilly's etc near you.

Might be time for some good ol' "Shade Tree mechanics" to get you going.  Not sure if your pump is "replaceable" or if you have to get the whole VST with the pump.

Make sure that it's the pump (or VST) that you need, Verify the correct P/N, and some of the online places may offer expedited shipping.

Phil

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Always check the Easy Stuff First!
20' Weeres fishing pontoon
90 HP E-Tec E90DPLSUM  05184332
Lake Tawakoni, TX - Catfish Capital of Texas
Gotsea

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Reply with quote  #8 
Quote; "Fuel comes out of the low pressure pump cover when I prime" what exactly you want to say?, is the low pressure pump the Lift pump? is it leaking? through the cover?
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1994 24 WA Baha
2008 300 HP DPXSC S/N 05228253
15 1/4 X 19 Mirage Plus 47 MPH top end @ 5,750 RPM
32 MPH cruising @ 12.5 g/h
 South Florida
windseafire

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Reply with quote  #9 
Thanks PhilH12, I would see if I can buy a fuel pressure gauge.
windseafire

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Reply with quote  #10 
Gotsea, sorry I wasn't clear. I loosened the lift pump (low pressure pump) cover to check fuel was getting that far then tightened it again. There are no fuel leaks.
Gotsea

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Reply with quote  #11 
Ok good
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1994 24 WA Baha
2008 300 HP DPXSC S/N 05228253
15 1/4 X 19 Mirage Plus 47 MPH top end @ 5,750 RPM
32 MPH cruising @ 12.5 g/h
 South Florida
rickmcd53

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Reply with quote  #12 
The symptoms sound a lot like the electric high pressure pump is not working. You can unplug it and use jumper wires to run it directly on 12 volts. With the key off and pump hotwired you should be able to feel and hear it running.
windseafire

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Reply with quote  #13 
So I got the fuel pressure guage and there is a constant 30psi when the engine is running. Spark is good to.
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