electric fuel pump for outboards

Joined
Jul 21, 2008
Messages
11
Anyone out there used one of those 12 volt, low pressure, electric fuel pumps like the ones Sierra Marine parts sells? Supposedly they eliminate the need to have a fuel primer bulb on outboards? Thanks, dave
 

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,771
Re: electric fuel pump for outboards

Think about this very carefully. Yes, current EFI/DFI outboards have electric fuel pumps but the engines were "designed" to use them, and they still do have a primer bulb. If your engine is carbureted, think about what happens if the engine stalls. The pump will keep running. If the reason the engine stalled was because of a stuck float, leaky needle and seat or some other carb issue, you would pump the engine full of fuel which creates a prime candidate for an explosion. Also consider that should a fuel leak develop and you have an engine fire, the fuel pump will continue to feed that fire even if the engine dies. Usually under these circumstances, the operator will not think to turned the blasted key off so the boat burns to the water line and everyone in it is at risk. So why isn't it a problem on EFI/DFI engines, or your car for that matter? Because the ECU know when the engine is running or because the oil pressure switch has a set of contacts in it that shuts the pump off if the engine dies. Yes -- people add these but they don't consider the consequences. These engines have run for decades without the need for an electric pump. Fix what's wrong and be done with it.
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: electric fuel pump for outboards

100 % agree, fix it right or not at all.
 
Joined
Jul 21, 2008
Messages
11
Re: electric fuel pump for outboards

Thanks so much for the info and the easy to follow explanation. I agree with both of you. I will not be using an electric pump for sure. Dave
 

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: electric fuel pump for outboards

Are you thinking of using the electric pump to replace the fuel pump or to replace the primer bulb? There's nothing wrong with using an electric primer pump. In fact the V8 OMC outboards (carb'd) used to come with one. Very convinient on any outboard that the primer bulb is not that easy to get to.
 
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