Engine was professionally winterized last fall and stabilizer added to fuel tank. First time out this year topped off the tank with Premium fuel (with 10% ethanol). Ran OK for several hours....burned off half a tank or so....noticed a bit of RPM drop occasionally every 15-30 seconds, but nothing really serious. Filled the tank with another 7 gal of Premium fuel last weekend. Boat ran fine for 10-15 min, then stopped (dropped into "Guardian Mode" I think) and two long beeps. Engine didn't stop. Put into idle and sat for a few minutes....no further hiccups. Started again and within about 5 min did the same thing (dropped into Guardian Mode). It will limp along in idle with no further issues. Never stalls or stops running. As it gets warmer, it seems to happen more frequently. Very sudden stop, but with continued occasional RPM drop (not a lot, just 50-100 rpm) until WHAM, dead stop (engine still running). Has stalled once, but started right up again.
Am thinking: 1) bad fuel or 2) the shop fogged the engine (it is fuel-injected) and thus messed up the sensors or 3) perhaps a oil pressure or temp sensor has gone bad. None of the engine readings are abnormal....all are in spec.
Is it worth trying to drain out the fuel tank, refilling with ethanol-free fuel + ISO Heet, or do I bring it right back to the dealer (about 50 miles tow) since it is still under warrantee?
Am thinking: 1) bad fuel or 2) the shop fogged the engine (it is fuel-injected) and thus messed up the sensors or 3) perhaps a oil pressure or temp sensor has gone bad. None of the engine readings are abnormal....all are in spec.
Is it worth trying to drain out the fuel tank, refilling with ethanol-free fuel + ISO Heet, or do I bring it right back to the dealer (about 50 miles tow) since it is still under warrantee?
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