Topic: Differences between three (or more) current OMC Fuel Pumps?

This topic has 9 replies, 7 voices, and was last updated 3 years, 1 month ago by outbdnut2.

Viewing 10 posts - 1 through 10 (of 10 total)

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November 15, 2021 at 10:12 pm #249748
seakaye12
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US Member
I started looking on Marineengine for a new fuel pump and see that there are (at least!) three models with essentially the same appearance. Can someone tell me what the difference(s) might be?

OMC Part number 0388685, 0397839, 0391667.
November 15, 2021 at 10:57 pm #249754
crosbyman
Participant
Canada Member - 2 Years
some have thicker bases but I think they are basically the same …

I found some at $6.99 (no longer available from DEALPEAK folks) … I know OEM is better but…

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November 16, 2021 at 12:08 am #249756
dave-bernard
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US Member
position of bolts on 2 of them the other the position of hoses.
November 16, 2021 at 2:34 am #249757
Mumbles
Participant
Probably the same pump mechanically but the inlets and outlets are clocked differently. The beauty about the square pumps is you can locate both of them wherever you want as long as the internals are correct.
November 16, 2021 at 9:29 am #249760
crosbyman
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Canada Member - 2 Years
real tricky to re assemble but after a few they are ok I guess

http://www.leeroysramblings.com/Rebuilding_fuelpump.htm

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November 16, 2021 at 11:04 am #249766
seakaye12
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US Member
A big difference in price from one to another ($114.91 to $84.57……)

Crosbyman…..do those cheap pumps work OK? I seem to remember you or someone saying that a few “mods” had to be performed first????
November 16, 2021 at 12:03 pm #249768
crosbyman
Participant
Canada Member - 2 Years
personnaly I can’t say I had issues with the cheaper ones except for my own screw-ups … that said you may need to reorient the in and out nipples to adjust for clearances

the cover one is easy just unscrew and align as needed. the OUTPUT nipple is trickier and requiers some brainwork to align the internal frame & check valves to work properly .

they are small ans easy to swap . You can always carry a spare in case you have worries of failure 10 miles out !

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November 16, 2021 at 8:31 pm #249805
mike n
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US Member
i ordered cheap one from ebay and the base plate was too thick and wouldnt fit under the cover of a 1982 evinrude 7.5. i swapped the base plate and it worked great.

mn
November 18, 2021 at 7:25 pm #249873
phil
Participant
US Member - 2 Years
The list prices aren’t THAT different, maybe they are overstocked on the one they’re selling cheaper?

http://www.omc-boats.org
http://www.aerocraft-boats.org
November 18, 2021 at 8:37 pm #249878
outbdnut2
Participant
US Member
I’ve used the cheapie Chinese knockoffs without any problems, and like Wrenchero said, they are a bit thicker. I have heard of anoccasional bad one,but at less then $10, just toss it an d put in another. At that price, I ordered a few so I have some around when I need.
Dave
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