Engine just died HELP!

hap777

Cadet
Joined
Oct 23, 2012
Messages
22
still 1/4 tank of gas left on 8 hp boat motor.running good then just died. .I did have air valve on tank closed when it ran good, then just died. Yamaha 8 hp P165 (reply to ricc@shaw.ca)
 

rjcamel2355

Petty Officer 1st Class
Joined
Apr 22, 2015
Messages
221
(Assuming you're saying you can't get it to start back) Compression test, and then spark test. That's always the first two things to check. If those both check out, then look at the fuel system (tank vent, primer bulb, etc). It will die if the vent is closed after running for a bit, because it literally runs out of fuel because the tank can't vent.
 

tpenfield

Moderator
Staff member
Joined
Jul 18, 2011
Messages
18,147
still 1/4 tank of gas left on 8 hp boat motor.running good then just died. .I did have air valve on tank closed when it ran good, then just died. Yamaha 8 hp P165 (reply to ricc@shaw.ca)

OK, how about opening the air valve on the tank . . . Might need to re-prime the fuel line.
 

mike_i

Ensign
Joined
Jun 28, 2017
Messages
959
Open the vent and see if that helps, you may have a vacuum. Even though your gauge shows 1/4 tank the pick up tube may not be able to pull fuel from that low level. Add more fuel and see what happens. What happens when you pump the primer bulb?
 
Top