No start Nissan 25hp 4-stroke

brucedoer

Cadet
Joined
Oct 25, 2009
Messages
10
I have the 2006 Nisson outboard that had a locked up fuel pump in the vapor separator. I replaced the high pressure pump with an aftermarket one because from Nissan you have to buy the whole vapor separator to get the pump. $700. So after doing so, I still can't get the pump to run on it's own without jumping it directly from the battery. The motor will run if I do that. It won't run if I let the computer control it through the wire harness to the pump even though it's showing voltage at the connector to the pump. (15 volts while cranking engine). The ground wire to the pump also shows continuity to engine. Is there something else anyone can suggest to check out this problem? Thank you in advance for any help!
 

pvanv

Admiral
Joined
Apr 20, 2008
Messages
6,559
You did not mention model. Year is irrelevant. Assuming you have an MFS25B.
Whoever told you the FFP is not available separately lied.
3AC043100M​
FUEL FEED PUMP​
$451.30​
That's MSRP. Most will discount.

The pump will run for a few seconds when the key first comes on. Maybe you have a bad pump. Is there voltage at the pump itself?
 
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