Fuel Pump Rebuild

B

bhoneycutt

Cadet
Joined
Apr 29, 2007
Messages
10
Ok i have a 115hp inline 6 1977 i believe. sn 5077081. It is having problems with running dieing afer a short period of time or if i try to speed up. If you have someone pump the bulb slightly while it is starting to die it usually picks back up and runs. So I am looking for a fuel pump kit for this but cant seem to find one. Im assuming with the way it is acting that is probably the problem. I attached a picture of the pump disassembled. Also what is good to clean it out with? just any kind of solvent?

IMG_41091.jpg
 
S

skynyrdcat

Petty Officer 2nd Class
Joined
Mar 11, 2007
Messages
157
Re: Fuel Pump Rebuild

It,s not always the pump when this problem happens, but since you have it apart, a new kit wouldn't hurt.
Try this link

http://www.eastcoastmarineservice.com/models2.htm

You should also check the remainder of the fuel system, if you're getting air in the line through bad quick connect or joint in the line you can experience the same issue.

When I'm not sure, I like to take a new line, drop one end in a tank of mixed fuel and the other end directly to the fuel pump (by passing everything). Pump it up and try it out, if it does good, then you have an air leak somewhere between the pump and the tank (or the tank may not be venting properly).

A way I used to check the fuel pump is to run a line (hooked to the carb side of the fuel pump) into a suitable container, crank the engine...
You should have a good strong sream and it should hold out through several cranks. If the stream is sporatic (squirt, then stop, then squirt again, then stop etc etc) then the pump would be bad.
 
B

bhoneycutt

Cadet
Joined
Apr 29, 2007
Messages
10
Re: Fuel Pump Rebuild

thanks for the help. before i took the fuel pump off i changed the hose and bulb to see if it was that. im going to change all the hoses going to the carbs and stuff out while i am in there because one is leaking. I had tried that link but it doesnt look like the have my year availble yet..... any other suggestions?
 
hkeiner

hkeiner

Lieutenant Junior Grade
Joined
Oct 17, 2006
Messages
1,055
Re: Fuel Pump Rebuild

Mercury issued a Service Advisory (#2001-17) that provides some troubleshooting guidance on fuel starvation. All you need is a vacuum gauge, a piece of clear hose, and a t-connector to do the troubleshooting. The tests help confirm (or eliminate) various common causes of fuel starvation, such as a failing fuel pump, a restriction in the fuel line upstream of the fuel pump, or an air leak in the fuel line. Once you confirm (or eliminate) the various likely causes, you can then limit your repair effort to what is most likely wrong and avoid spending time and money on those components that are OK. Systematic troubleshooting is how I would approach the problem anyway.

Good luck



http://www.marinepartsman.com/Mercury-Marine-service-bulletins/Mercury-Mariner/2001/EN_17.PDF
 
You must log in or register to reply here.
Top