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2006 DF140 Fuel Starving When Hot

J

Jimmy R

New member
2006 DF140, can sit for weeks or months, starts right up, runs smooth and strong. Stop and shut down to fish, crank back up and take off, the motor dies like it’s out of fuel. Sometimes the bulb is soft and empty, sometimes it is tight and full. Either way, pump the bulb a few times, the motor will start up, run a little rough then smooth out, and run fine until the next stop and restart.

I have replaced: fuel pickup at the tank, antisiphon valve, fuel line, water separator (housing and element), bulb, low pressure pump, low pressure filter, high pressure pump, high pressure filter, and all internals in the VST. Still has this issue.

Any ideas????
 
www.selffixer.com

Suzuki Outboard motor: DF90 100 DF115 DF140 from 2001 to 2009 repair manual

Original Suzuki Repair manual for 2001-2009 Suzuki DF90, DF100, DF115, and DF140 outboard engines. P/N 99500-90J07-03E - GENERAL INFORMATION - PERIODIC MAINTENANCE - ENGINE CONTROL SYSTEM - ENGINE ELECTRICAL - FUEL SYSTEM - POWER UNIT - MID UNIT - POWER TRIM AND TILT - LOWER UNIT - WIRE / HOSE ..
www.selffixer.com www.selffixer.com

The above link is for a service manual.

Have you checked the fuel lines under the cowling for kinks, partially clogged, loose clamp? I’m assuming it’s not a sensor since you didn’t mention any codes? Fuel tank vent line free and clear?

Sorry, I’m not much help.
 
What if you cycled the key on/off 2-3 times then start the engine and let it run for 10 seconds, shut it down and drain the VST and accurately measure the amount of fuel that came out the VST. Run it hard, shut it down and remeasure the volume of fuel that’s in the VST. That might give you an idea if your issue is downstream of the VST which would include the float and needle valve.

Have you checked fuel pressure?

The service manual will have a list of checks to work thru. I’ve purchased a couple of service manuals from the above posted link, they are legit, no funky charges on my credit card.
 
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