new OS 21 marine

[anthony_marquart]

Anyone have experience with the new OS .21 marine engine? Cooling in the center of the head?

 

[Ron Olson]

Jerry Dunlap was doing some testing with it. He posted some results in the Outboard forum, why in there I don't know.

 

[Jerry Dunlap]

I've been running the new OS VZM in a 33" vee hull for a month. Like all O.S. engines, it's very nicely crafted. At both the NAMBA and IMPBA national events, the engine ran fine, but I wasn't among the "fast crowd." I think the MAC 21 I have in my 20 Sport Hydro is a stronger engine.

JD