No issues until today. Running at 3/4 throttle motor just shut off. Starts but dies quickly.
SOURCE: 40hp 1987 yamaha outboard motor will run for 30-60
Sound like the fuel pump is not keeping up with the engine's demand. Check it out. Good luck. Hope this helps.
SOURCE: 1996 Mercury 150 Nitro EFI
Dont have the manual in front of me...recollect that there's two types of warnings. The pulsating warning is oil (starts with 30 minutes of oil left) or the fuel filter (or sperator, something like that) may have water in it. Running outboard with cover off, is a little black box that would have a red light lit if that's the case. If oil full & no red light, may be oil injection system...would also check to make sure lines aren't pinched, etc. Mine has been specific to oil the two times its gone off.
The full non-pulsating is engine overheat. Not sure beyond that.
Not much, but hopefully gets you going.
SOURCE: Yamaha 30 HP 3 cylinder 2 stroke
Did you change plugs? If you did chek the plug to see if piston has hit the end of plug. Do a compresion check Jim OMC retired Mech
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Thanks everyone. Fuel had water in it. Runs great again. God bless. RB
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