Re: MICRO TRAWLER
- --- In firstname.lastname@example.org, "nezih" <gencahm@...> wrote:
> Nezih, further thought into the matter brought me to an engine Yanmar used to produce.....a diesel outboard. I believe these were probably more popular in your part of the world then here in the US. When I first started construction of my MT I seriously considered this engine. The high cost (over 10 grand) did me in and shortly thereafter I purchased a new 40 hp 4 stroke Suzuki DF40 gasoline outboard instead, at 1/3 the cost of the Yanmar. If you can locate one of these Yanmars, it would meet a lot of your criteria: it's diesel so there will be a cost savings for fuel along with greater economy.....it's all self contained meaning there will be no engineering think trying to design a power plant (inboard power) into a boat design that was never considered for anything but outboard power. And, finally, it came from a reputable manufacturer in Yanmar. Rarely do they come up for sale on Ebay and when they do, they are not cheap. But it is something to consider if you can acquire one. I believe your small, lightweight air-cooled diesel outboard was feasible on the MT, but in my humble opinion, automotive style engines like the water cooled Subaru flat four would add a lot of weight. I don't think the VW flat four is going to neatly fit into the lower cutwater hull of MT, let alone the Subie flat 4.....
- 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.