Author
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Topic: Why ???
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Sal DiMercurio |
posted 04-30-2003 12:06 PM ET (US)
Why are you running a 14 diameter that belongs on a "V'6, on a 3 cylinder engine ? Again, why a 13-3/4 diameter that belongs on a v4 or v6 on that 3 cylinder - 70 hp ? Theres absolutly no need for all that diameter on your 17' boat, unless you feel the engine needs to be stressed & lead to an early grave. You don't say what your maximum rpms are with either prop. It's possible your doing damage to that engine doing what your doing. Sal Sal
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Sal DiMercurio
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posted 04-30-2003 12:08 PM ET (US)
Don't know how this post got here, as I was answering Blueboats post of 150 psi update, 4/30/03 Sal |
acassidy
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posted 04-30-2003 12:23 PM ET (US)
Talk about leaving us hanging. Sounds like someone was getting it. |
jimh
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posted 04-30-2003 01:29 PM ET (US)
You hit "NEW THREAD" instead of "REPLY". Either that or a RAM DIMM in the server was struck by a cosmic ray or a neutrino as a result created a new thread, gave it a new topic, and used your name and password to do it. |
skred
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posted 04-30-2003 02:49 PM ET (US)
Yeah, ya gotta watch those neutrinos: I hear they all use Michigan Wheels....
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blueboat
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posted 04-30-2003 04:04 PM ET (US)
Sal, Sorry if it made you mad I was running those props. Seems like your leashing out at me. The reason I am running those props is that I have a manual and that is what it lists. You are the 1st person on several boards that has objected to the prop size. What would you recommend? Have you run a 70 hp 3cyc 1974 model on a 17' to get results from? I am a test engineer and I am always looking at improving things but please don’t get hostile or talk down to people. Nobody benefits |
Dr T
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posted 04-30-2003 04:21 PM ET (US)
Cosmic rays--I guess our circuit boards are getting a bit dense....How do you distinguish between a random and a RAM DIMM error? |
Sal DiMercurio
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posted 04-30-2003 07:29 PM ET (US)
Blue, a 14" dia prop dosen't belong on a 3 cy 70 hp engine, that size is for a v6 engine 150 hp & up. I'm not getting hostile, just wondering why the huge prop. The largest dia I recommend for a 70 hp on your boat is 13", even a 12" will give you better performance. Think of it this way, engineers build 4x4 pickups & figure the correct tire dia, ...then the kids go out & buy rims for an 18 wheeler & put these monster tires on it, the tranny catches hell bigtime & the speedo isn't even close & what used to be first gear, now acts like 3rd gear,.....same pricipal with the huge prop. Go to a prop shop & borrow a 12 or 13" dia prop with the same pitch your running now, then come back here & let us know if the engine & boat & you are happier. Sorry if I sounded gruff, didn't mean to, but did raise my eye brows as to why that size. Try what I said & let us know. Sal |