Fuel Pump 1965

The diaphram on my 1965 m318 also failed (first day of vacation and the first day back in the water after the overhaul). I could not find the correct match for the carter pump. I have run an electric pump (designed for carburated engines).   

It is a micro electric fuel pump for carburated engines. I bought it at advance auto parts, any parts store will have something similar. I left the original pump in place. I mounted the new pump to the stringer and wired it to a terminal on the relay bracket that was hot only with the ignition on.

I don't think this will be a long term fix. I will either get a marine specific electric fuel pump and plumb it into the fuel line (I doubt the unit I bought was designed for use in an enclosed bilge.) If I get a new electric unit I will have a block off plate made to go where the mechanical pump was. Or I will find the correct Carter mechanical Pump. Hope this helps.

Gary

David,
Ive been running an electric fuel pump on my 64 American Skier with the 6 beater 170 for over a year with no problems. I mounted it just above the stringer, right at the gas tank, behind the rear seat.

i dont remember what brand, I think I can find out if youd like?

Post some pics of the ol girl!

Changing to an electric pump is not a safety risk(well it could be if not done right)...make sure you use the marine rated lines and fittings. You can purchase an electric fuel pump for marine application that is a replacement for mech. types and for carburated engines!

Electric fuel pumps (marine or otherwise) should have provisions to stop the pump if the engine dies. Most people use an oil pressure switch. The engine will start an run with no initial oil pressure because of the fuel in the bowl of the carburetor until oil pressure is built and the pump turns on.

Such a safety device helps prevent the fuel pump from filling the bilge in the event of fuel line failure...once the engine quits, the pump quits.

thi is why there are bia (boating industry of america) regulations as to fuel and elect. parts,as a repair shop i cannot remove are alter any component of elect. or fuel system. i can ,by law,only replace w/bia approved parts. if i do i become,in the eyes of the courts, a boat manufacture. in the event of fire or other problems this =lawsuit. the reason for the little tgs on all marine parts SAE 9711=no lawsuit. yamaha & mercury marine are big advocates of leave the engineering to them and the repairs to us,just use the rite parts............boat dr

boat dr; Where are ya located?

john

Is that pump a true marine? The original on my '66 was just a normal auto pump with a glass sediment bowl on the bottom and no extra line to the carb for when the diaphram blew.

After this weekend,I will be going back to a mechanical pump. The electric pump I installed failed so I returned it for another, Had it swapped out at the campground in an hour. Ran the boat that evening, no problems. The next morning the boat would not start, acted like no fuel again. I could hear the little pump going clicky clicky. Pulled the line off the carb to see if any fuel was getting through. No. I decide the go get a better electric pump. I get a different brand at a different supplier. The pump is about three times the size of the other electric pump. RAted at 4-7 psi. Wire it up and check to see if it works, Oh yeah! works too good. I can hear fuel flowing through the carb and leaking out in places it shouldn't. (outside the carb body through the primary and secondary throttle shafts)

Needless to say I gave up. I spoke to some guys at Hurriakin marine and Marysville marine (both old chrysler experts) today to see if I could source a fuel pump for the M318 Polyhead. It turns out that the pumps were the same for the M318's and the later LM318's. So I have a pump on the way. I will add a hose barb connection to the flame arrestor to have a place to run the overflow tube.

My question is this? Is it likely that I damaged anything in the carb with too much fuel pressure? The summer is coming to an end and I have a trip to lake cumberland planned. I don't want to mess around with problems. I can get a remanufactured replacement Carted AFB from the Carburetor Specialists for about $ 320.00 plus the core.
It would get me some peace of mind. Any ideas?

Thanks,

Gary

It turns out NAPA #M73039 doesn't look like the original. The arm is not the shape at all. Luckily I saw a pic before I bought it. This supplier did some research on his own with NAPA and found out my pump has been discontinued. His next suggestion is to help me find diaphrams or rebuild parts from another pump. I will get a pic or two posted one of these days, she looks good sitting on the trailer!
AMSKIER65

TimD-This one doesn't have the extra line to carb. It looks original, whats left of the paint is the same as the rest of the engine parts.
AMSKIER65