F115 Requires Fuel Purging

[Ernie G]

After proper warm-up, engine will stall around 2,000 rpm and will not plane. Disconnect outlet hose on low pressure pump and purge with 3 squeezes of primer bulb. Reconnect, start engine and bleed system at test valve on top of fuel injection manifold. Will run great the resto of the day. Replaced clamps, o-rings, hoses, and clamps. Still does the same. Help!

[boats.net]

The steps you are taking to get it running shouldn't have any affect on a hesitation or stalling problem. You might remove and clean the vapor separator tank, there is a filter inside tank on electric fuel pump that may be plugged up.

[Ernie G]

I failed to mention that the reason I did all these line and clamp replacements, was because I saw an air pocket in the small filter bowl on the low pressure side of the pump. Does this engine rid itself of air automatically?

[Ernie G]

If it is that filter, why does it run fine the rest of the day after purging the system?