Transom Jack

[Chopperbill]

According to the RULE the cavitation plate should be one inch below or even with the keel. Mine appears to be not quite 3" below. I can move it up one inch and then run out of transom. See they make jacks but need to quit throwing money at this. Is that extra distance really going to be a problem on such a low horse power boat. I'm not a speed freak so the loss of a couple of mph er knots is not that important to me.

 

[Sea Rider]

Many post have been lost for ever and ever. I Love challenging themes as tthe one related nearly cast on stone, rule off thumb issue that states that AV plate must be even or slightly under boat's keel/bottom. Recently made a water trial test on a 4.00 Mt rib powered with a Tohatsu 18 HP. AV plate is even with keel as in picture.

Parameters to have into account : Flat calm waters at a 1.5 Km rowing course. Rib was fully inflated, engine well trimmed and rib perfectly ballanced. By which lower leg number, 1-2-3 would you state water flow at speed passed ? And why you assumed that ? As already know the answer, will not comment untill there's enough post for a nice open discussion.

Happy Boating

 

[Chopperbill]

Probably clear this up for us new guys. My boat at the lowest part of the keel angles up to the bottom of the transom aprox. 2 inches. I have been measuring from the AV plate to the bottom of the transom. If I use the measurement from the AV plate to the lowest point of the keel I get closer to the "rule". Lots of diagrams have the transom shown just as low as the keel. Which is correct?

 

[Chopperbill]

To clear more things up in my first post. Been working on my boat on crutches and with my hip brace could not bend down and never did see that the keel was lower than the bottom of the transom until yesterday. Told you I was a new guy. LOL

 

[Sea Rider]

My boat at the lowest part of the keel angles up to the bottom of the transom aprox. 2 inches.

You are reffering to the lowest part of the keel angling AV plate aprox 2 inches high right ? Transom has nothing to do was not invited to the party yet. Lowest part of keel or boat's bottom "must deal" with lower AV plate. Let's see if somebody chimes in for other answers as well.

Happy Boating

 

[Chopperbill]

Terrific! I was looking at it the wrong way. Dumb! That's what I get trying to work on it when I'm all crippled up. LOL. Boat looks like it's set up pretty good. RELIEF! Knew you would straighten me out. Thanks! Cant believe I'm a Seaman, more like a stooge. LOL

 

[Sea Rider]

Sorry for posting again, systems has gone nuts again and doesn't want to upload pic, second try.

I Love challenging themes as the one related nearly cast on stone, rule off thumb issue that states that AV plate must be even or slightly under boat's keel/bottom. Recently made a water trial test on a 4.00 Mt rib powered with a Tohatsu 18 HP. AV plate is even with keel as in picture.

Parameters to have into account : Flat calm waters at a 1.5 Km rowing course. Rib was fully inflated, engine well trimmed and rib perfectly ballanced. By which lower leg number, 1-2-3 would you state water flow at speed passed ? And why you assumed that ? As already know the answer, will not comment untill there's enough post for a nice open discussion.

Note: Uploaded pic is not being shown at lower post, does someone sees it ?

Happy Boating

 

[Chopperbill]

No Title

This is a photo you off the site you directed me to the other day. Got my interest.

 

[Sea Rider]

This particular case only applies if using a L (20") shaft Tohatsu on other than 15" sib/rib transom heights. Being yours a S transom, including S engine much friendly to sort it out, probably you have already achieved a perfect engine/transom height match that we don't know about. Will find out latter once on water and under trial and error as soon you are plainly recovered from surgery..

Happy Boating