BoatBanter.com - View Single Post - Yamaha F150 break-in

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On Fri, 13 Mar 2009 21:32:18 -0500, wrote:

On Fri, 13 Mar 2009 13:23:43 -0400, wrote:

4 strokes have come a long way in the last 20 years, mostly because of
the Japs. My Honda Prelude redlines at 7500 RPM and the cam timing
doesn't even advance until you get to 5000 (VTEC). I don't hear that
much either.
I guess I am still just old school ... but I do get a lot of hours out
of my engines.

Back in the 1960's, Honda had a little 50 cc, twin cylinder, DOHC,
race bike that redlined at 20,000 rpm.

Yeah but those were the guys wouldn't't weigh pistons on a triple beam
because it wasn't accurate enough ;-)
We do have to credit the Germans and Japanese for making us change our
engine factories. We were still building the stuff that allowed us to
blow up all their factories. They got a clean start and kicked our
ass. My Merc is a Yamaha powerhead. American foot. Best of both
worlds in my opinion.

Those that keep talking as if 4-strokes are somehow "new technology"
simply because they are mounted on the transom of a boat are pretty
ignorant. If someone said that 4-strokes have come a long way in the
past 100 years, they might be on to something. Most of the
developments are not specific to 4-strokes. Materials, manufacturing
techniques, fuel delivery...