Hey All,
I'm chasing a dragon on this one and could use some more heads.
Symptom:
My 225 runs great and strong at idle, always starts right up, and will run strong under 2,000rpms. However if I push it above 2,000rpms it'll run for a while, never an exact amount of time, sometimes 10min other times 2min, at which point it will begin losing power and bucking as though fuel starved or vapor locked. It doesn't stall but just shakes and bucks. I come off throttle into neutral and then I can only push up to a slow "idle speed" in gear...about 1,000 to 1,200rpms. Strange thing happened the last time I went out. I had moved the primer bulb from between the racor and motor up to my center console (which put it between the fuel tank and racor). When I was running at 3,000rpms the motor did the same thing it had been doing but also stalled out completely. Upon inspection I found the cup attached to my racor had "popped" off. I screwed it back on sqeezed the primer bulb until primed and got under way again...less then five minutes later the same thing happened. The cup had no visual defects and once I replaced it it screwed on very well hand tight and had no leaks when running at idle or low speeds...I'm guessing some sort of back pressure build up causing it to "pop" after moving the primer bulb check valve closer to the tank as opposed to after the racor causing the racor to take the pressure? I'm lost on this one.
Interventions:
-Pumped fuel from tank and replaced with clean fuel
-Breather tube operates properly
-Drained VST, Removed and visually inspected for sediment (Float appeared to operate smoothly)
-Cleaned HP Pump Screen (no sediment found and appeared to be clean)
Replaced:
-all fuel lines from tank to LP pump (including those in the motor)
-Primer Bulb
-Racor
-LP & HP Filters
-LP & HP Pumps
-Spark Plugs
The Motor is very clean and has little corrosion. I've also inspected the vacuum lines and have found no deficiencies. the Diaphragm that sits above the vacuum canister (for the intake) operates properly. and there are no fuel leaks in the housing (Know very well how easy it is to "cut" the HP screen O-ring on install...went through a couple of those).
I'm chasing a dragon on this one and could use some more heads.
Symptom:
My 225 runs great and strong at idle, always starts right up, and will run strong under 2,000rpms. However if I push it above 2,000rpms it'll run for a while, never an exact amount of time, sometimes 10min other times 2min, at which point it will begin losing power and bucking as though fuel starved or vapor locked. It doesn't stall but just shakes and bucks. I come off throttle into neutral and then I can only push up to a slow "idle speed" in gear...about 1,000 to 1,200rpms. Strange thing happened the last time I went out. I had moved the primer bulb from between the racor and motor up to my center console (which put it between the fuel tank and racor). When I was running at 3,000rpms the motor did the same thing it had been doing but also stalled out completely. Upon inspection I found the cup attached to my racor had "popped" off. I screwed it back on sqeezed the primer bulb until primed and got under way again...less then five minutes later the same thing happened. The cup had no visual defects and once I replaced it it screwed on very well hand tight and had no leaks when running at idle or low speeds...I'm guessing some sort of back pressure build up causing it to "pop" after moving the primer bulb check valve closer to the tank as opposed to after the racor causing the racor to take the pressure? I'm lost on this one.
Interventions:
-Pumped fuel from tank and replaced with clean fuel
-Breather tube operates properly
-Drained VST, Removed and visually inspected for sediment (Float appeared to operate smoothly)
-Cleaned HP Pump Screen (no sediment found and appeared to be clean)
Replaced:
-all fuel lines from tank to LP pump (including those in the motor)
-Primer Bulb
-Racor
-LP & HP Filters
-LP & HP Pumps
-Spark Plugs
The Motor is very clean and has little corrosion. I've also inspected the vacuum lines and have found no deficiencies. the Diaphragm that sits above the vacuum canister (for the intake) operates properly. and there are no fuel leaks in the housing (Know very well how easy it is to "cut" the HP screen O-ring on install...went through a couple of those).