Mercruiser Fuel Pump Pressure?

rbcool · Post by **rbcool** » Sat Oct 09, 2010 12:12 pm

Had the exact problem on a deck boat one time..... was the accelerator pump. I had so much gas in my oil that it smelled flamable.

rossjo · Post by **rossjo** » Sat Oct 09, 2010 1:52 pm

Accel pump? How? I was suspicous of my accel pump, and have replaced it twice because I thought fuel was bypassing it, but ... its only supposed to work when its pumped up/down.

???

Might get to work on it this week ... finished my dock work this am.

alexander38 · Post by **alexander38** » Sat Oct 16, 2010 4:42 am

Did you fix it yet ? wonderin' minds need to know.

rossjo · Post by **rossjo** » Sat Oct 16, 2010 9:04 am

Haven't gotten to it yet. Business picked up, as well as fishing and some work on my dock.

alexander38 · Post by **alexander38** » Sat Oct 16, 2010 9:25 am

O man, you have got to prioritize better

prowlersfish · Post by **prowlersfish** » Sat Oct 16, 2010 9:30 am

alexander38 wrote:O man, you have got to prioritize better

Well he has been fishing

rossjo · Post by **rossjo** » Sat Oct 16, 2010 10:56 am

Off to the Georgetown Wooden Boat Show today ... http://www.woodenboatshow.com/

Pretty cool - they have a boat building competition - 2 guys build a boat in about an hour that they have to take across the harbor and back without sinking to win.

alexander38 · Post by **alexander38** » Sat Oct 16, 2010 12:05 pm

must be how sea-ray gets new models

he was fishin' and ?

k9th · Post by **k9th** » Sat Oct 16, 2010 2:56 pm

But was he doing any catching?

rossjo · Post by **rossjo** » Sun Oct 17, 2010 9:39 am

My neighbor just moved here from Greensboro, so I took him Sheepshead fishing ... his 1st Sheepshead ever was 9#, after 20 minutes ...

Here I am with one of 7 we caught a few evenings ago ...

And a couple of pix from the Georgetown Wooden Boat show ...

k9th · Post by **k9th** » Sun Oct 17, 2010 10:18 am

Great pics Rossjo.

alexander38 · Post by **alexander38** » Fri Oct 22, 2010 10:15 am

Well I've got and ideal for you with what's up with your q-jet . A year ago I was going through the corn gas hell. I had a carb that went bad I bought a new one from serria. Well went back in to some post and my captain's log to see what it was doing . And it sounds the same as yours. I jest took the old one apart and found pcs. of hard black rubber in the float and in the needle seat . And I'm ordering a new gasket set for today.

rossjo · Post by **rossjo** » Fri Oct 22, 2010 10:27 am

I've replaced these twice - no improvement.

I haven't had time to work on it ... but am thinking of swapping th Qjet from my old Vette and see if it works. If not, I'll replace the fuel pump.

Not sure which model fuel pump (mounted on water pump housing/pulley) I have ...
Carter or Airtex ?

Anyone?

alexander38 · Post by **alexander38** » Fri Oct 22, 2010 11:36 am

You might want to change that pump. Had trouble with one and it would over pressurize the bowl. But I can't help you with which you have I've got old school on block bowtie pumps.

rossjo · Post by **rossjo** » Fri Oct 22, 2010 12:02 pm

I'm 90% sure its Mercruiser Fuel Pump p/n 861677T
"7.4LX Bravo MPI Gen VI 1996-97 w/ seawater pump"
http://www.go2marine.com/product.do?no=77339F
which replaces p/n 818383T

which seem to be interchangeable:
http://shop.ebay.com/?_from=R40&_trksid ... Categories
"New Mercruiser style mechanical fuel pump to mount on seawater pump.
Replaces OEM part# 818383T and 861677T."

But I need to dig a little deeper ...