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I have a 2012 F70 with 450 hrs.
I've always been really good with maintenance, always using Yamaha parts, good gas, etc.
I recently had the motor die while just idling, and it wouldn't re-start. The motor would turn over & fire shortly, then die. No unusual circumstances happened when this occurred, it just died at idle.
Checked primer bulb, it was full.
Check the connection at the engine, depressed the balls at the end & pumped the primer ball . . . no obstruction.
I have a small racor water separating filter between the tank & motor . . . I dumped the bowl (valve on the bottom), re-primed it, and no luck.
Came in on the electric *****ing motor . . . brought it home, hooked it up to the hose/ ear muffs and it fired right up.
Ran it for a 20-30 minutes, no problem . . . put it in neutral and rev'd it a bit, no problem. Weird.
I performed the last service 40 hrs ago . . . replaced thermostat, internal zinc anodes, NGK spark plugs, engine oil & filter, lower unit oil, full impeller kit, fuel filters both under the cowling and outside (Racor).
I buy my gas on land and always from a Mobil gas station.
I do usually add a little Lucas Oil Upper Cylinder Lubricant for good measure (I know, some say it's snake oil).
My battery is a new AGM & is in good shape and fully charged.
My fuel tank is in great shape and only holds 7 gallons, so I turn over the gas rather quickly and it doesn't get old.
I am in CA, so I am forced to use fuel with ethanol in it unfortunately.
The motor has always been flawless. I do have a command link multi-gauge tac. and I got no warnings or alarms.
I'm kind of stumped as to what caused the motor to die and not restart. I did check the killswitch and that didn't seem to make a difference.
Love the motor . . . I'm just now a little concerned running the boat any distance from help . . . sometimes I'm out of cell phone / vhf range.
Any advice on things to double check would be appreciated.
I'd rather not just start replacing things randomly.
.
I've always been really good with maintenance, always using Yamaha parts, good gas, etc.
I recently had the motor die while just idling, and it wouldn't re-start. The motor would turn over & fire shortly, then die. No unusual circumstances happened when this occurred, it just died at idle.
Checked primer bulb, it was full.
Check the connection at the engine, depressed the balls at the end & pumped the primer ball . . . no obstruction.
I have a small racor water separating filter between the tank & motor . . . I dumped the bowl (valve on the bottom), re-primed it, and no luck.
Came in on the electric *****ing motor . . . brought it home, hooked it up to the hose/ ear muffs and it fired right up.
Ran it for a 20-30 minutes, no problem . . . put it in neutral and rev'd it a bit, no problem. Weird.
I performed the last service 40 hrs ago . . . replaced thermostat, internal zinc anodes, NGK spark plugs, engine oil & filter, lower unit oil, full impeller kit, fuel filters both under the cowling and outside (Racor).
I buy my gas on land and always from a Mobil gas station.
I do usually add a little Lucas Oil Upper Cylinder Lubricant for good measure (I know, some say it's snake oil).
My battery is a new AGM & is in good shape and fully charged.
My fuel tank is in great shape and only holds 7 gallons, so I turn over the gas rather quickly and it doesn't get old.
I am in CA, so I am forced to use fuel with ethanol in it unfortunately.
The motor has always been flawless. I do have a command link multi-gauge tac. and I got no warnings or alarms.
I'm kind of stumped as to what caused the motor to die and not restart. I did check the killswitch and that didn't seem to make a difference.
Love the motor . . . I'm just now a little concerned running the boat any distance from help . . . sometimes I'm out of cell phone / vhf range.
Any advice on things to double check would be appreciated.
I'd rather not just start replacing things randomly.
.
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