I'm becoming a total water-head?

[Aqua Zombie]

Hi there world of hydros! I am brand new at this great sport and am starting off on the Minimax level. I am wondering if anybody knows about how far my prop should be in the water when the boat is compleat? I am building the motorboard now and my brain is turning to mush over how tall, or short the thing should be. The motor will be a greentop KG7 H. Any info would be apreciated. (this is my first post here as well, Woo Hooo!) Thanks.

[mdaspit]

Hi there world of hydros! I am brand new at this great sport and am starting off on the Minimax level. I am wondering if anybody knows about how far my prop should be in the water when the boat is compleat? I am building the motorboard now and my brain is turning to mush over how tall, or short the thing should be. The motor will be a greentop KG7 H. Any info would be apreciated. (this is my first post here as well, Woo Hooo!) Thanks.

A lot of really smart, really good guys on this thread to help you, in the meantime, go to the top of the page under the "search" function, search for "minimax". I know there have been a number of posts in the past, may be something there. lots of good information in that library. Probably good stuff about your KG7 also.

[Aqua Zombie]

I will do just that! Thank you for the direction.

[DeanFHobart]

Cavitation Plate

Make the bottom of the motor cavitation plate even with the bottom of the boat.

Good Luck.

[mdaspit]

Make the bottom of the motor cavitation plate even with the bottom of the boat.

Good Luck.

There you go Zombie- and from Dean Hobart no less. You can take that to the bank.

[ebss011]

souped up

u need to buy a 102mod and a hydro! get alittle bit of wheel time and go have fun!youll never sleep good again!ok makin another one!

[Aqua Zombie]

Thank you Dean. That lines up with every thing I have heard. I wonder though... Am I over engineering it to make it an inch or so lower, leaving me the option to shim it up for more adjustability?

[jeff55v]

Make the bottom of the motor cavitation plate even with the bottom of the boat.

Good Luck.

Question: Does a KG-7H have a Quicksilver lower unit?

[DeanFHobart]

Yes

Yes, the "H" means it came with a quicksilver lower unit.

[DeanFHobart]

That's OK

Thank you Dean. That lines up with every thing I have heard. I wonder though... Am I over engineering it to make it an inch or so lower, leaving me the option to shim it up for more adjustability?

That will work also. However, don't run out of 'clamp' .... the amount you can jack up the motor and still have the clamps on the motorboard.

Good Luck.

[hydroid]

Hey AZ, check out www.muskokaseaflea.ca, dedicated minimax/most fanatics, largely in Ontario, Canada.
I have a KG4H, goes like stink. Your boat will fly!

[DeanFHobart]

Lots Dragging

Remember, if you run the cavitation plate below the bottom of the boat, there is a lot of "stuff" dragging through the water.

Good Luck.

[B Walker]

Yes, your over-engineering it.

You would never run this with the cavitation plate below the bottom. Ever.

Back in the day, some people were known to run that with the center of the prop shaft level with the bottom. I dont recommend that.

So thats your high and low max dimensions.

Set it up with cav plate level with bottom to start. raise it up 1/4" at a time till the prop looses bite. Go down a quarter, your good.

Good luck with your project.

BW

[Aqua Zombie]

Thanks all again! It is starting to make a little sense up in my wheelhouse now! Though the gears do turn a bit slow up there. Ill get some pics up for you all as soon as I figure out how. And to you B Walker... that is what had my head spinning a bit, because I have heard of people running their prop halfway in the water before. I am new to all this and learning bit by bit every day. This project is just the start. I can feel it getting into my viens allready!

[Silas_53A]

all racing applications run the CENTER of the prop pretty much at or just below the bottom of the boat. Even though it may seem counter intuitive (didnt make any sense to me a couple years ago) running the prop half out of the water is faster.. by a lot. Thats why, in a lot of classes, there are restrictions to exactly how high you can run the motor. At a certain point it can become dangerous and/or cause damage to the motor, such as being hard to control and starving the motor of water causing overheating.