What height to mount a Johnson 9.5 on the transom?

[great_white_fisherman]

A little background first. Those who know about these little motors know there is a water bypass plate right above the anti cavitation plate. When I first got this motor I wasn't sure what this plate was for but I had a feeling it had to do with the water intake. My suspicions were proven true when I was running in a barrel and allowed the water level to slowly go down until the plate was exposed and the pisser ran dry. I shut it off immediately of course. So with this in mind...

From bracket to cav plate is 17" and my transom is 16". Everything I've read about proper mounting says the cav plate and keel should be as close to level as possible so that the cav plate will ride the surface of the water at high speed. That's all fine and good till I thought about that water plate. If the cav plate is on the surface, the water plate will be out of the water.

What should I do? Leave it an inch low? Or will the plate being exposed not matter when going at speed?

 

[Starcraft5834]

consider installing a kicker bracket which provides flexibility to lower the motor in the water to your desired location for the set up you have... if that moves the motor tiller out of reach some... buy a tiller extender..

 

[shrew]

The Anti-ventilation is typically parallel withe the keel. I'd assume the water intakes are BELOW the anti-ventilation plate.

 

[JimS123]

Everything I've read about proper mounting says the cav plate and keel should be as close to level as possible so that the cav plate will ride the surface of the water at high speed.

High speed and 9.5 are mutually exclusive.

AV plate position is important when optimizing high HP motors on hulls that are capable of relatively high speeds. For a little fishing motor like the 9.5 just hang her on the transom and forgetaboutit. Raising it will provide no measurable difference.

 

[racerone]

A short shaft motor mounts on a 15" transom.----The main water intake is the screen behind the prop.------No need to over think this !

 

[Sea Rider]

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