Lift Plates

[Richard]

To all who subscribe to this web page:
Today my winter project a 22 Apache with 200 EFI Merc, made it to the water for the first time. Despite forgetting to connect the fuel line. All went well.
I am writing for two reasons: first, to thank all those who have assisted me both with advice and parts from the various forums associated with Scream and Fly. I consider myself a Senior Citizen boater in that I am over the age of 50 but still love speed on the water. It never ceases to amaze me at the variety and craftsmenship of the rigs I see here. My hats off to all of you.
My second reason for writing is the boat is equipped with a CMC hydraulic lift plate. I am asking for advice as to how to make best use of it. The plate has the standard setback. The motor is mounted two holes up on the plate, and I am running a 24 pitch Trophy. While putting breakin time on the motor, I ran it up a bit on the trim to see how it would react. The plate is set just about as low as I can get it. Water pressure(with the t-fitting for the pressure line in the bypass hose ) is about 10 psi at about 5000 rpm.
What is the best way to proceed, and at what point does water pressure become a critical factor?

Thanks for the help!!!!!

[Liqui-Fly]

Good to hear you splashed her. At 5000 rpm's 10 psi is plenty and you should always maintain atleast that in your jackplate endevours. Run that plate up until the bow drops or you loose water pressure.

Rondak Romp June 20th to the 24th. Don't miss it!!

David

[goodsax]

Just curious. When you say "run the jack up until the bow drops", are you using any positive trim? Is the goal to adjust attitude without positive trim? My Checkmate enchanter has CMC 5.5" and it still isn't enough. Suggestions???? Thanks, Dave

[Liqui-Fly]

When starting out I would run my jackplate as low as possible so my trim would be effective. Once you have suffiecient bow lift and a good riding attitude you can start running your jackplate up to increase propshaft height. If your water pressure stays good (> 10psi) there will come a point where your prop loses leverage and your bow will drop and scrub off speed. Reset your plate 1/4 to 1/2 inch lower from the point your bow dropped and you should be pretty close to your sweet spot.

If you don't want more setback then mess with some props. You'll probably have to run your propshaft relatively deep so start with through hub props like a Raker, Tempest or Hydromotive 3 or 4 blade.

David

[DaveR]

I have an enchanter with 8" of set back and use a 26" chopper which gives a lot of lift, and I think the 8" is JUST barely enough set-back. Seems like we were talking about Enchanters a week or so ago weren't we? Do a search on the General board, there may be some info you can use there.