Re: MICRO TRAWLER
> Usually the valves were burned and new rings needed the lower endEngines for cars are engineered far less robustly than engines under constant high loads such as for tractors pulling ploughs, and boats pushing up waves. Those don't get to cruise along at low load on a flat or to go downhill most of the time. I guess an ordinary (marinised) car engine might do if it is rated for much more power than is required in a boat, and then de-tuned, but that gets back to power to weight considerations...
> bearings and crank held up well. So in a day or so she was back on
> the road again and that was OK for a car.
- True Doug, Ford FE gas truck engines had larger diameter crankshafts and cam profiles designed more for low RPM torque, compared to the equivalent car engines. Some GMC truck gassers even had exhaust valve rotators and stellite valve seats, anticipating heavier engine load demands.Your Isuzu may have had oil starvation issues if the oilpan capacity was not increased and the pickup lowered. I have a marinized 1956 Packard V8 with the oilpan capacity increased from 5 quarts to 4 gallons and an integral oil cooler built in. Most working boats of 25-30 feet and up have gone diesel but that may not be a practical option for the MT being discussed. 4 cycle outboards have been around for several years now and have a good track record even in small commercial fishboats that get hard use.