08 Yamaha 50hp EFI Outboard Stalling.

Gone Postal

Cadet
Joined
Aug 10, 2011
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13
08 Yamaha 50hp EFI Outboard Stalling.
Motor was perfect Running 4300 RPM and starting on first quick hit of key.
I had a DA attack and Ran the Reserve Tank Dry. Would not run on Primary Tank.
I have Replaced Both Tanks with 12 Gallon. I Replaced Bulb and Line from tank to engine.
I have Cleaned out Fuel Bowl and replaced Small Paper filter.
I have made sure the Tanks are vented, I even loosened Cap to be positive.
Now I can Run it at fast Idle and Runs Fine.
I left tied to Trailer and Put in Water. Run it in Forward at Full Throttle @ about 3000 RPM's , best could do under Load of pushing Trailer and Truck up Ramp.
Ran Fine Great Power. No Hesitation. No Skipping. Nothing.
Took Off Trailer and went out. Run it in Forward at Full Throttle @ about 4300 RPM's. Full Power Ran Great. For about a Minute or Two.
Now I have tried this 4 different days and it Stalls at Same time and point in the Cove.
It will Kind of Gallop like someone is moving Throttle up and down.
It will Run at 2000 rpms most of time. move up to about 3000 rpm's and it stalls.

PLEASE HELP. Hope it is a simple fix.
need Suggestions, Should I Flush Injectors, Check Fuel Pump, Blow out Lines. etc
Engine Runs to good to stall.
No dash Lights on this Model, could computer be in Limp Mode?
Would disconnecting the Battery reset comp.
Sorry new to Boat Motors.

Thanks in advance for all help. This Site is very help full.
 

Gone Postal

Cadet
Joined
Aug 10, 2011
Messages
13
Re: 08 Yamaha 50hp EFI Outboard Stalling.

Well I found problem. It has an inline filter after fuel pump did not see. It was stopped up. Runs great now.
 
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