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Fuel problem - I think

sbbamafan

New member
My daughter and I proceeded to ride for about 5 minutes - wanted to stay close to the launch as we were waiting for my wife to arrive. We idled through a couple of coves for 15+ minutes, stalled a couple of times as it has been. I thought this was just from a low idle speed out of adjustment. Coming out of the cove, I gave it about 1/2 throttle to get on plane. It spit, sputtered, shuddered and died. After a few minutes I was able to get it to fire up for about 6-8 seconds and died again. I thought I fouled out my plugs or something idling so long. I thought maybe if I could get it started I would run it hard for a few minutes and it would be ok. I got it started and gunned it - ran about 3/4 throttle for about 1/2 mile turned and came back. I eased the throttle back thinking all was ok and it stalled as I was slowing down. Over the next while, I was never able to get it started again. I remembered I had some starting fluid. I gave it a squirt and it started for about 10 seconds, then stalled again...never to start again. Fortunately there was a very nice couple that towed me in behind their pontoon. THANK YOU DAVID AND SUE - WHERE EVER YOU ARE!!!!

My thoughts: 1st thought was bad gas since I topped off the tank just before getting to the lake. 2nd thought was fuel pump. 3rd thought is the fuel filter / separator (on my boat there is only one Sierra 18-7845).


After reflecting on this the last 2 hours or so it is hard to think its bad gas. It was from a Shell station near the lake in a high traffic area that tons of people use. Fuel pump has never been changed in 12 years and 600 engine hours that I have owned the boat. It looks original as paint matches engine. That would make it +/-22 years old if it is. I believe the fuel filter was changed (I did it) spring of 2010 but it might have been 2009. I know I am going to catch flack for that as ethanol sucks and requires frequent changes of filters...

FWIW I have used Sta Bil ethanol treatment religiously since early last year. The boat has a Holley carb.

Big question - what are the thoughts you experts have?? Thanks in advance!!
 
I would start by emptying the fuel filter/water separator and see if there is a lot of water inside. If it is full of water, there is your problem. Also, even if you topped up the gas tank, if the remainder in the tank was old it could have gone bad.

And don't forget to check the anti-syphon valve. If it is stuck, you will never get any gas out of the tank.
 
I would start by emptying the fuel filter/water separator and see if there is a lot of water inside. If it is full of water, there is your problem. Also, even if you topped up the gas tank, if the remainder in the tank was old it could have gone bad.

And don't forget to check the anti-syphon valve. If it is stuck, you will never get any gas out of the tank.


What and where is the anti-syphon valve. Do I definitely have one?
 
It is attached to the fuel tank. It prevents fuel from spilling in case of a fuel line rupturing. And yes, you should have one.

Google the term.
 
FWIW - I forgot to give you more info since I dont usually post on this site.

[FONT=Verdana, Arial, Helvetica]1991 Chaparral 2000SL
Volvo Penta DP570 with Stainless props
Holley 4150 carb rebuilt about 7 or 8 years ago and has been flawless since
1103 hours - runs like new except for this.
I have owned it since 7/2000, bought it with about 650 hours.
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