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Update. It was not a fuel starvation issue - however the injectors were dirty - it was the CRANKSHAFT POSITION SENSOR which was rubbing against the reluctor wheel. The 4.6L 5.7L 6.2L GM engines from this period (circa 1995 - 2002) have plastic timing covers. Abnormal wear on the front...

My 2002 340DA with 6.2s V-Drives has had a fuel issue for months. I am convinced it needs a new CoolFuel pump and I have a spare on the bench. Not looking forward to this....

Wore a hole in the copper capillary line. Except I haven't been able to find a good HVAC mechanic that will repair a capillary line and the three I have spoken to have said that when air is sucked into the line the oil turns to acid which will damage the system. Here is a pic...

My 7 year old Dometic Cruisair STX12-410A AC unit's capillary copper line rubbed against the compressor canister and wore a hole therefore turning the unit into a brick. That's some bad luck. So looking at a replacement unit was wondering if anyone here has a Webasto FCF air condition unit and...

Have same setup 6.2MPI V drives and run 20MPH at 4K RPM.

RESOLVED! Fuel starvation issue. The fuel line from the tank to the fuel pump had internally collapsed!

There is an intermittent arc under load (>3000rpm) on the coil. The plugs, wires, cap and rotor are new so re-checking plug gaps and will take a very close look at the coil checking for a carbon track/crack and will do Ohm test of the new Merc wires. The marina service said they swapped coils...

We are still working on this issue and will let you know. Make sure your distributor has not come lose - these motors are sensitive to timing. I recently discovered that Mercury had a service they offered around 2006 to reprogram the ECU to "loosen" the parameters for limp mode due to timing...

Serial number OM313031 350 MAG MX 6.2L MPI INBOARD (2002) that ignition sensor is not used. Again, thank you for your input! Here is another video of the issue

Are you talking about the sensor that is inside the distributor under the rotor? If so, this model year engine does not use that sensor. If not, can you please elaborate? Thank you!

Thank you for your questions. It looks like a bad tachonometer but it is not an instrument issue, the tach is reading correctly. There is a loss of power as shown, it's as if the ECU is, for lack of a better term, "bumping" into limp mode. I'm not sure what the correct term is. My GM dealer...

2002 Sea Ray 340 Sundancer with twin Mercruiser 6.2 MX MPI motors with 500 hours, having this issue above 3,000 rpm. Marina service has set timing, replaced cap & rotor, spark plugs and wires and they can not figure out this issue. Batteries are new, new alternator, fresh fuel (in fact they...

Mine is doing the exact same thing. Start generator, let it warm up, switch to ON on panel and only reads about 30 volts. It it turn on the water heater the load causes it to then read 115v. I'll check the capacitor and let ya'll know.

If your oil pressure gauge fluctuates with wild swings the oil pressure sending unit on the engine may need replacing. About a $40 part. The 6.2s were engineered with large tolerances for good oil flow so your oil psi at idle drops to around 8psi.