Yamaha 225 fuel injection pump question

gjlgctn

Recruit
Joined
Nov 26, 2010
Messages
2
Hi folks
Was hoping someone can help with the testing of MY Fuel injection pump, I have a Yami 1997, 225HP TXRV ,Initially the problem was intermitent cut off,s then the engine was taken in were all the filters and the 3 diaphragm fuel pumps were replaced , along with the filter inside the vst tank , compression on all cylinders were also good. At this time the engine will turn over and crank if shot with starter fluid then cuts off as if no fuel in the injectors ,( dont like to do that to often cuz no oil may cause a serious damage ) I would like to know how i can check the voltage to the pump and what range it should be befor i shell out 800+ Bucks :eek: for the pump. anu help will be greatly apreciated
Thank you ,,, Walt.
 

99yam40

Fleet Admiral
Joined
Sep 7, 2008
Messages
8,851
Re: Yamaha 225 fuel injection pump question

I am fairly sure there is 12 volts + to the pump at key on, but the ground is controlled by the ECU to make the pump run
 

gjlgctn

Recruit
Joined
Nov 26, 2010
Messages
2
Re: Yamaha 225 fuel injection pump question

So when the ignition is on i should see 12v, and an OPEN reading when ignition off ?
Thank you , ill start probing around .
 
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