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1965 6 hp Evinrude fuel pump - very confusing repair/replace options

M

MisterWing

New member
I am new to boating, and recently started trying to get the 1965 6 hp Evinrude Fisherman that came with my boat running. The previous owner had used it, but it had sat unused for a few months when I bought the boat.

When I pull the cover and pump the primer bulb, I see fuel dripping from the fuel pump. The pump assembly screws were kinda loose, so I snugged them up, but it still leaks. It appears that the original pump must have been replaced at some time with a square style pump - and that's where the confusion begins.

According to various online sources, the pump 'should be' an Evinrude 0388685. HOWEVER, there are no rebuild kits for that model, and the replacement options are new OEM which go for $80-100. I don't want to go that route if i don't have to.

My questions -
1.How do I know if the pump I have is an 0388685 - are their identifiers on the pump?
2. Will the $15 rebuild kits (Evinrude 393088 for example) for other small square style pumps work (even though they do not include that model #) if I do have an 0388685? I have read conflicting information on several web sites.
3. Will the aftermarket square replacement pumps work or are they too large or otherwise wrong for this motor? Everything I find in product descriptions and comments indicates they are not a suitable replacement and that I need to buy the Evinrude one for this motor.

Thanks in advance!
 
I think you will find that Sierra kit 18-7823 is the fuel pump repair kit you need. http://www.sierramarine.com/sierra/2018/2018sierracatalog.html#p=267

You can compare the pump you have fitted with the 360 degree image of 0388685 on the parts pages on this site http://www.marineengine.com/newparts/part_details.php?pnum=OMC0388685

Read very carefully the advice and instructions for overhauling the pump on LeeRoy's Ramblings http://leeroysramblings.com/Rebuilding_fuelpump.htm

In particular note what he says about two screws fixing the pump to the crank case and two holding the whole thing together.

When you are ready dismantle it very carefully noting EXACTLY how and where each part is fitted.
 
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Some of the very early square pumps were different inside. But since they were such a piece of junk, they probably have been replaced by now.
 
Thank you for the info. I thought I had stumbled upon some reviews of this kit saying that it wouldn't work for a 0388685, but it seems worth a shot.

I like the suggestion to compare my pump to the 360 degree view. I'll post my findings when I do that!
 
I pulled my pump and it has a 1/4" raised base (where it mounts to the engine) versus a shallow base/flat back that the 0388685 has. Which leads me to believe this is an aftermarket replacement pump - so a rebuild kit should work!

In addition, the hose clamps were too loose which doesn't help matters.
 
Well I have some on hand.-------Bought last year , now no longer available apparently.----For 100 HP Johnson 66 model that can be cut to fit many pumps.
 
vics - the Sierra kit 18-7823 did the trick.

The existing rubbery gaskets in my pump were very deformed and probably in need of replacement. The rebuild went pretty well for my first attempt. Its not leaking anymore after pumping up the primer bulb and trying to start the engine, so on to the next areas to get this old motor running!

Thanks again!
vics said:
I think you will find that Sierra kit 18-7823 is the fuel pump repair kit you need. http://www.sierramarine.com/sierra/2018/2018sierracatalog.html#p=267

You can compare the pump you have fitted with the 360 degree image of 0388685 on the parts pages on this site http://www.marineengine.com/newparts/part_details.php?pnum=OMC0388685

Read very carefully the advice and instructions for overhauling the pump on LeeRoy's Ramblings http://leeroysramblings.com/Rebuilding_fuelpump.htm

In particular note what he says about two screws fixing the pump to the crank case and two holding the whole thing together.

When you are ready dismantle it very carefully noting EXACTLY how and where each part is fitted.
Click to expand...
 
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