Re: RIGHT PROP
Brad, we all hope you stay around. Theres no harm in stating a point, opinion or making a comparison. We're all here to learn. <br /><br />You are right about the rods. We do know at what point they give up. We learned it the hard way. The OMC V6 looper rods from 1993 & up (light rods) will give up at 9500 in a circle race motor. IE -- hard on, hard off. They stay together fine at 10,000+ in a drag motor -- hard on, feather off.<br /><br />The stock rods from the other OMC / BRP loopers (commonly refered to as the heavy rods) will stay together in both applications at 11,000+ rpm. So will the Merc rods. So far we havent found any weakness in the Yamaha rods to think they wont hold up as well. <br /><br />Youre also right about the pistons. While all the pistons are in fact aluminum, we wouldnt dream of turning the cast pistons like we do the forged. That being said, I do know of some folks turning the Vertex cast about 8000 with no problem. I wouldnt but they do. Actually I use forged pistons in everything I have. Regardless of rpm. But, every OE piston made today will have no problem at 6000 rpm. Think about it -- if the factory thought there was a problem with their cast piston and stock rod at 6000, why is the rev limiter set at 6700?<br /><br />Remember, 2 stroke outboards (compared to the Chevy) has no valves to hit the piston, no lifters to worry about, no push rods to bend or springs to break. There just aint a whole lot to a 2 stroke.<br /><br />As for the tach, youre right again. There are some outboard tachs on the market that dont read right. But the OMC / BRP tachs are regarded to be some of the most accurate ones around. Especially the OMC digital tach. Thats why its not unusual to find an OMC digital tach in a race boat with a Merc.<br /><br />I hope you and Kenny get together. Have one for me!
