Fuel Pump testing

[Eric 3.7LX Alpha 1]

Re: Fuel Pump testing

You've checked vacuum, how about pressure to the inlet of the carb.... assuming it's a carb... as we don't even know what year or model engine you have. :facepalm:

 

[John Evans]

Re: Fuel Pump testing

5.7L EFI GM 350 V-8 1998/0L010035_0L325976

Her's a link to the Throttle Body and Fuel Filter/Cooler pdf's.

http://www.marinepartsexpress.com/Me...L COOLER.pdf

http://www.marinepartsexpress.com/Me...TLE BODY.pdf

I hope this helps. I looks like the fuel pump is a hard place to get to.


Thanks in advance for you help.

 

[John Evans]

Re: Fuel Pump testing

Another frustrating day. I bought a fuel water separator and was going to replace it to see if it helped, although I only had a few hours of running on the last one. When I opened the box there was a big dent in the side. So I took the family out on the old one. She ran poorly, barely getting on plane backfiring allot. We later limper over to a dock for a late lunch to meet some friends and I got a new F/W separator at the dock and replaced the old one. She ran fine over to a favorite cove to anchor a while. Heading to the dock she seemed weaker then started barking at me again just before the dock. Overall around 7 miles on the new filter. Could I just have that much junk in my tank? Should I put a cheap auto filter in line before the F/W separator and replace them every day out till it stops?

 

[John Evans]

Re: Fuel Pump testing

I should have posted this a long time ago. I ask my boat guy to do a tune up late in the 2012 season and we ran it after he was done. After experiencing the problem he says you've got a burnt valve. I hauled the boat over to his shop. He found 2 burnt valves and a cracked head. I only had a chance to run the boat a few times after the repair and she ran great but I reserved judgement till I had a few hours on her. Now that I've recovered from an unrelated broken elbow I've had a good summer with the boat and I'm satisfied. The whole repair ran around $2k parts and labor, including the new head, much cheaper than I thought it'd be.