Mercruiser 350 Horizon

[William S.]

I have a 2001 vintage Mercruiser 350 Horizon that will only run for a short while before dropping rpms below 2100 and running really rough and finally dying. The cooler the engine, the longer it will perform normally. Give it a 30 minute rest, and it may run for about 20 minutes before choking off again. Mechanics have checked fuel pressure, computer codes, and ignition spark to no avail. Seems to be related to temperature somehow, although no alarms are sounding for engine temp., transmission temp. or oil pressure loss. Gauges read normal operation. For what it's worth, this all started when I wound a lobster warp around the shaft and produced a similar situation. Shaft is clear now. HELP!

 

[achris]

Re: Mercruiser 350 Horizon

Can we please have an engine serial number. Those engines came with a few different computers, and the only way to find out which one is by the serial number...

Chris......

 

[alldodge]

Re: Mercruiser 350 Horizon

Wound a lobster wrap around the shaft? Would that be a lobster trap around the prop shaft?

 

[achris]

Re: Mercruiser 350 Horizon

Wound a lobster wrap around the shaft? Would that be a lobster trap around the prop shaft?

I was think more along these lines.... :facepalm:

 

[alldodge]

Re: Mercruiser 350 Horizon

I was think more along these lines.... :facepalm:

I like your idea :thumb:

 

[William S.]

Re: Mercruiser 350 Horizon

My mechanic, with Mercury Tech assistance, deciphered the problem...... Crossed Fingers!!

Ignition Sensor in Distributor had gone bad, possibly tied into pot warp (pot buoy line to you non-Mainers) problem it seems. Replaced coil and ignition (spark) sensor.

Thanks!!

 

[alldodge]

Re: Mercruiser 350 Horizon

My mechanic, with Mercury Tech assistance, deciphered the problem...... Crossed Fingers!!

Ignition Sensor in Distributor had gone bad, possibly tied into pot warp (pot buoy line to you non-Mainers) problem it seems. Replaced coil and ignition (spark) sensor.

Thanks!!

:laugh: :clap2: :clap2: :clap2: Glad you have an answer :sleeping:

 

[achris]

Re: Mercruiser 350 Horizon

My mechanic, with Mercury Tech assistance, deciphered the problem...... Crossed Fingers!!

Ignition Sensor in Distributor had gone bad, possibly tied into pot warp (pot buoy line to you non-Mainers) problem it seems. Replaced coil and ignition (spark) sensor.

Thanks!!

Absolutely not possible. It's just a coincidence.

And who are you calling a 'non-mariner'??????

Chris.......