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Part 1
Reading a couple of threads (the beginning of “Propshaft material?” "Nickels spacers explaine…") led me to wonder about what applies to a ski boat as apposed to a hot rod or race boat.
I have a 1967 Belmont flatbottom 19’ ski boat Dad built (see “My 1967 Belmont Flatbottom”). Everything is still the way he built it. Nothing has been changed or rebuilt, including the original factory stock crate 425 Olds he bought in early 1967, with a single carb. The Edelbrock M16 wet log exhaust is only plumbed with 2 7/8” thru transom ports. It has a screamin (literally) Hallibrand parallel v-drive with what I believe are 14% gears, connected with a two piece 1250 (?what I was told) driveline and what I believe is a stainless prop shaft running through a 10 degree strut to a 11 ½ x 16 ½ Kindsvater prop. Fixed cavitation plate. It will top out at 55-60, which I have done this year more times since I got it back on the water than Dad probably did the whole time he had it. Bottom line: not big horse power or speed; maybe a bit of torque compared to other stock motors.
1 – This is what made me post – my prop is 2 inches back from the strut – I get that this is a huge concern with a hot rod, but a ski boat? Dad would say, again, it has worked fine for 46 years…
If there is a difference in level of concern, what speed/rpm is where the line is drawn?
Reading a couple of threads (the beginning of “Propshaft material?” "Nickels spacers explaine…") led me to wonder about what applies to a ski boat as apposed to a hot rod or race boat.
I have a 1967 Belmont flatbottom 19’ ski boat Dad built (see “My 1967 Belmont Flatbottom”). Everything is still the way he built it. Nothing has been changed or rebuilt, including the original factory stock crate 425 Olds he bought in early 1967, with a single carb. The Edelbrock M16 wet log exhaust is only plumbed with 2 7/8” thru transom ports. It has a screamin (literally) Hallibrand parallel v-drive with what I believe are 14% gears, connected with a two piece 1250 (?what I was told) driveline and what I believe is a stainless prop shaft running through a 10 degree strut to a 11 ½ x 16 ½ Kindsvater prop. Fixed cavitation plate. It will top out at 55-60, which I have done this year more times since I got it back on the water than Dad probably did the whole time he had it. Bottom line: not big horse power or speed; maybe a bit of torque compared to other stock motors.
1 – This is what made me post – my prop is 2 inches back from the strut – I get that this is a huge concern with a hot rod, but a ski boat? Dad would say, again, it has worked fine for 46 years…
If there is a difference in level of concern, what speed/rpm is where the line is drawn?
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