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Evinrude 115 Low Fuel Flow Alarm

D

Don Bishop

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" I recently disabled the VRO

" I recently disabled the VRO on my '94 Evinrude 115 due to oil alarms and distrust of the unit and went to pre-mix. The oil line is plugged and the VRO wires disconnected. At WOT I get a steady alarm tone with no reduction in power. The alarm sticker says this is due to low fuel flow. There is no apparent loss of power. I changed the primer bulb, removed the small in-line fuel filter in the engine cowling and the fuel/water separator-filter is new. Where is the sensor and how should I troubleshoot?

Thanks for any help. "
 
"Don..... I'm not aware of

"Don..... I'm not aware of the V/4 engines having the fuel alarm, but if they did, it would not be a "low fuel" condition, it would pertain to a "fuel restriction". If any of the later V/4 engines have this feature, I'd appreciate being corrected.

The V/6 engine do have this feature, and the alarm is the same as the overheat alarm which is a steady and constant beep. This is usually caused by a "anti siphon" valve which is located where the rubber fuel hose connects to the built in fuel tank. The cure being to remove the valve, knock out the center components, then install it as a straight thru fitting.

In your case, I would suspect that the steady constant alarm is being caused by a failing water pump assy.

There is a heat sensor located in each cylinder head (tan wire).

Joe
"
 
" Joe, thanks for the reply.

" Joe, thanks for the reply. I'm not sure either if this alarm exists. There is a decal on the console that shows 4 alarm states:

1. Slow beeps every 20 (40?) seconds for low oil level.
2. Rapid beeps for no oil.
3. Steady tone and engine runs half speed for overheat.
4. Steady tone and engine runs full speed for fuel restriction.

I have experienced all four alarms at various times. When I got alarms 2 & 3 last Monday, I decided to bypass the vro. Since then, I get alarm #4 almost immediately after going to WOT. I made 2 15 minute runs at 4100 rpm and 4500 rpm without the alarm sounding. After 15 minutes I went to WOT and the alarm sounded. I throttle down, turn off the engine, pump the bulb, restart the engine and rev it and the alarm quits.

I suppose the next thing to do is to to get to the fuel tank (sealed under the deck) and change the hose. You think there might be an anti-syphon valve at the tank? I'll look for it this weekend (the boat is on the MS coast, I'm not).

Thanks again for the feedback,
Don "
 
" Never heard of a low fuel al

" Never heard of a low fuel alarm? Sounds like something in the cooling system is not working right? Water pump, thermostat? "
 
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