Carb seems to have mind of its own

[kevdon]

Thank you all in advance for taking your time out to help me solve this issue. I have an 85 v that is powered by a 4cyl mercruser 170. the last 2 times out the boat has tried to quit running when i got up to about 15 knots.It starts right back up and runs fine at a lower speed.Whats got me is after it happened initially I thought I was low on fuel and the plane of accelerating was causing me to not get proper fuel.But tonite when we went out I put in 15 gallons of gas and a bottle of fuel injection cleaner.Boat ran fine at all speeds for 1st hour than same probs occured.I had new carb installed last season and have had no previous problem until now.I have mercruiser repair manual and it suggests running a few tests that require pressure gauges and such.I am hopin for an easy fix.Could the fuel filter be the reason even know it runs fine at lower speeds and starts up on a dime.I am wide open for feedback.Thanks all !!

[Skools Out]

will it rev up out of the water on muffs? yeah the fuel filter could do it, look around for another filter you don't know about, I bought a wellcraft 250 from Bygracealone and he had motors issues twice and i found that someone had installed a fuel filter set for the twin outboards one in each supply fuel line under the floor and one was stopped up and no one knew they were under there. it could be a stopped up fuel pickup in the tank or it could be the pickup line in the tank has a pin hole in it sucking air when not completely full, or loose fuel line or fitting somewhere causing it to suck air. just a few thoughts.

[kevdon]

Thanks skool !!! I ad inquired about a good canvas man in the raleigh nc area.Blue suggested asking you ! Would like to complete my cockpit enclosure. Thanks !! Will try fuel filter in the AM.Guess that to be the best and cheapest starting point.

[Skools Out]

i don't do much canvas work but can look around since we are close to each other

[kevdon]

will it rev up out of the water on muffs? yeah the fuel filter could do it, look around for another filter you don't know about, I bought a wellcraft 250 from Bygracealone and he had motors issues twice and i found that someone had installed a fuel filter set for the twin outboards one in each supply fuel line under the floor and one was stopped up and no one knew they were under there. it could be a stopped up fuel pickup in the tank or it could be the pickup line in the tank has a pin hole in it sucking air when not completely full, or loose fuel line or fitting somewhere causing it to suck air. just a few thoughts.




Well a pain free fix.I checked filter inside fuel pump and it was holding quite a bit of debris.I would have liked to replace but not the easiest to find on your local store.Its sits under the pump and is shaped like a half an egg.A little bit of cleaning and she was back runnin like the wind !! Thanks SKool!!

[kevdon]

Skools info about checking for another fuel filter led me right to filter on the fuel pump. That was the culprit.removed and cleaned.......No more problem...No money spent :beer:............Thanks !!!!

[spareparts]

Boats Unlimited should have that filter for you, if its the ceramic type, you need to change it out as its not easy to clean thru out. there used to be a guy named Casey Pitts that used to do canvas for us when I was at Capital Marine, he operated out of the back of our building at one time, he does excelent work, but be forewarned, he can be a little cranky at times. I think the name of his company was Shadow Pac. try looking it up in the locals. If you can't find him, check with Steve down at Trade Winds marina( "Boat Works"), he runs the shop up by the covered storage, he doesn't do canvas, but he will know of some one who does

[Skools Out]

glad you got it fixed, i have a few places i'll post when i get home i have used.