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| I have a 1750 crestliner fishhawk with a 90hp johnson 2 stroke motor, it currently has a 14x17 aluminum prop. It accelerates and get on plane fairly well and has a max speed of about 37.5mph at w.o.t. and approx 5500rpm. I was thinking of replacing my prop with a stainless. Should I get a prop with the same diameter and
pitch or should I get a smaller diameter (13.5 or 13.25) with a greater pitch (19). Would I see any advantages with the stainless. Trying to get more top speed and not loose my hole shot. Any advise would help. |
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Member
Posts: 10
| I think the theory on SS is that you can go up one pitch size without any significant loss on low end. I don't see a reason to decrease diameter. You want as much surface area pulling as possible. |
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| Eyez... is that you? (South Dakota "Eyez")
Anyway~
Your prop is the perfect size as evidenced by your hole shot and top rpms. Perfect.
If you go to a stainless prop in 17 pitch designed for your engine...it will most likely have a bit smaller diameter, because of more rake.
A stainless prop doesn't flex and offers more bow lift. This might translate to a small gain in speed (2 mph +/-)...because you can get more boat up and out of the water when you trim. You'll be able to trim higher. Stainless props have more cupping and tend to take a little more torque to turn them.
So, you'll likely see a slight drop in rpms. A little is ok.
You are doing pretty darn good with a 90hp on that boat right now, as is. |
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Member
Posts: 650
| any evin. dealer should suggest the best pick, and let you try them out first... PLEASE get back to us and tell us your results... |
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