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cavitation problem
cavitation problem
took my viper out today for the first time after the new motor. 150 johnson. at 65 it starts to cavitate bad . any advice?
1975 viper in progress
Re: cavitation problem
i have a new johnson 150 with 5 inch jack plate everythings standard and original except a 12 gallon fuel cell located in the front and a 3 gallon oil pick up tank mounted in the stern of the boat.There is also a sound system. this makes me carry 2 batt. for comfort also mounted in the front running on a switch.
1975 viper in progress
Re: cavitation problem
its a turbo prop 14 1/4 25 pitch stainless steel, and my motor is at its highest setting on the jack plate.
1975 viper in progress
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- HSF Supporting Vendor
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Re: cavitation problem
You need a shorter midsection. You have a 25" and need a 20".
Samari on s&f
Chet Olson
75 viper 2.4 200, 130 shot of NOS
91 vegas loaned out
79 vking project 2.5 280
Chet Olson
75 viper 2.4 200, 130 shot of NOS
91 vegas loaned out
79 vking project 2.5 280
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- Site Admin
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Re: cavitation problem
That motor is way to low. Get the prop shaft even with the pad. I bet you really bring that boat to life then and get a lot more speed out of it. That looks like a 25 inch motor to me but I could be wrong. A 20 inch would be ideal. Can you raise your jackplate anymore to Get the motor up more? Also, is it just me or is your jackplate on upside down?
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[ Post made via Mobile Device ]
-Kevin
Project Vulture | Project Vector | Project Vamp | Project Vixen
The Vulture Wish List | Project CobraJet
1977 HydroStream Vulture - Worlds longest ongoing project.
1982 Hydrostream Vector
1982 Hydrostream Vamp
1973 Hydrostream Vixen
1976 CobraJet Jet Boat - Outboard conversion project
1976 Pontoon - aka The Family Truckster
Project Vulture | Project Vector | Project Vamp | Project Vixen
The Vulture Wish List | Project CobraJet
1977 HydroStream Vulture - Worlds longest ongoing project.
1982 Hydrostream Vector
1982 Hydrostream Vamp
1973 Hydrostream Vixen
1976 CobraJet Jet Boat - Outboard conversion project
1976 Pontoon - aka The Family Truckster
Re: cavitation problem
yes its a 25 , but its all i have for now. the jack plate i had a friend make for me . i can drill some more holes and move the motor up about three inches , if you think this would help. at 65 its got alot more , but the cavitation at that speed is scary! i was thinking maybe it had to go down? good thing there is a great site like this one to help first time hydrostream owners like myself get the help we need and make a boats perform to there fullest.
1975 viper in progress
Re: cavitation problem
Do you think moving the motor up a couple inches and adding a hydrofoil would help ?
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[ Post made via Mobile Device ]
1975 viper in progress
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