Originally Posted by Conrad
Are you saying that the spark ignition allows them to reduce the compression and therefore also reduce weight via lighter construction?
The comment in the article about them converting a gasoline engine into a diesel engine brings back memories of the GM diesel fiasco when they attempted to do the same in the late 70's.
Yeah, Conrad.....the same alarm bells went off with me. Long before GM did the gas to diesel conversion, Dodge did there own conversion of a 331 cu. in. inline 6 back in 1936. Same result....couldn't keep the heads on them. Blown gaskets, warped heads and stretched head bolts were the norm. Sound familiar?
Anyway, with 95 percent parts interchangeability between the gasser and diesel version, it sounds like the same old approach, but with the mention of the beefier sleeves and spark ignition for lower compression (lower cylinder pressures), could they have actually learned something?
For my money, I'd like to see an EPA approved diesel outboard line, especially in the 15 to 150 HP range. Making it light in weight might require some metallurgic/composite evolution that, as mentioned in the article, the involvement of the DOD could push.