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Jon and V Boat Conversions & Modifications
1973 16' Crestliner V-hull Project
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<blockquote data-quote="DiveLiberty" data-source="post: 442832" data-attributes="member: 22384"><p>Still meaning to do a "walk around" video of the boat at some point, but been too busy using it for now! Taken it out 4 times now, and really really pleased with the way it fishes. I love the open floor space and front casting deck. </p><p></p><p>Quick question for anyone who sees this. I had some motor issues today on the old Merc that I'm pretty sure is a spun prop. It would idle fine in gear and push us along at idle speed, but would rev high with little movement when given throttle. I took off the prop and I'm pretty sure that I can see some "spin out" on the back end of the hub. More than anything, it just appears to be freshly "disturbed" rubber. Do these symptoms seem consistent with a spun hub? I wouldn't at all be surprised if this was the original prop that came with the motor (40+ years old). </p><p></p><p>My question is really about prop fit. The web provides a multitude of prop fit guides and calculators, but most of them don't go back as far as early 1970's. I found one that did list my motor (Mercury Model 200 20 HP), and it listed 2 props, both from Michigan Match. One looks identical to the original, 2 blade. The other is a 3 blade that looks like it will also match up. What will be, if any, the performance difference between a 2 blade vs 3 blade on a motor like this? It seems like I see nothing but 3+ blades on modern motors, even the low hp motors, but the original is a 2 blade.</p></blockquote><p></p>
[QUOTE="DiveLiberty, post: 442832, member: 22384"] Still meaning to do a "walk around" video of the boat at some point, but been too busy using it for now! Taken it out 4 times now, and really really pleased with the way it fishes. I love the open floor space and front casting deck. Quick question for anyone who sees this. I had some motor issues today on the old Merc that I'm pretty sure is a spun prop. It would idle fine in gear and push us along at idle speed, but would rev high with little movement when given throttle. I took off the prop and I'm pretty sure that I can see some "spin out" on the back end of the hub. More than anything, it just appears to be freshly "disturbed" rubber. Do these symptoms seem consistent with a spun hub? I wouldn't at all be surprised if this was the original prop that came with the motor (40+ years old). My question is really about prop fit. The web provides a multitude of prop fit guides and calculators, but most of them don't go back as far as early 1970's. I found one that did list my motor (Mercury Model 200 20 HP), and it listed 2 props, both from Michigan Match. One looks identical to the original, 2 blade. The other is a 3 blade that looks like it will also match up. What will be, if any, the performance difference between a 2 blade vs 3 blade on a motor like this? It seems like I see nothing but 3+ blades on modern motors, even the low hp motors, but the original is a 2 blade. [/QUOTE]
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Jon and V Boat Conversions & Modifications
1973 16' Crestliner V-hull Project
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