• Welcome to the Checkmate Community Forums forums.

    You are currently viewing our boards as a guest which gives you limited access to view most discussions, articles and access to our other FREE features.
    By joining our free community you will be able to:

    » Interact with over 10,000 Checkmate Fanatics from around the world!
    » Post topics and messages
    » Post and view photos
    » Communicate privately with other members
    » Access our extensive gallery of old Checkmate brochures located in our Media Gallery
    » Browse the various pictures in our Checkmate photo gallery

    Registration is fast, simple and absolutely free so please, join our community today!

    If you have any problems with the registration process or your account login, please contact support by clicking here or by using the"contact us" link at the bottom of the page.

pulsare 2100 set up questions

kct11

kct11

Well-known member
i did some searching the arcives, but did not find the info i was looking for, so here goes.

how does set back effect prop ht.? and what is best prop ht. for speed? i would imagine the prop type has some control of this, but just curious what everyone is doing. thanks, curt
 
There's some formula for how many inches back = how many inches up, but I don't go by it. Way too many variables for that formula to be worth a hoot.

No matter how far back you hang the motor, set the jack plate and engine mounting up so that you can get your best range of adjustment from the jack plate, and not have to remount the engine on the jack plate.

For instance, Checkmate's are not light weight tunnel hulls or narrow hull/wide-pad light boats like Allison, so you'll not need the propshaft to go above the pad except in extreme cases. I always rig my jack plate/engine mount heights on my Checkmates so that I can adjust the propshaft from 1" below the pad to 5" below the pad (for a 4" vertical adjust jack plate).

In an extreme case, like a 300X on a 2100 closed bow, and running a Sportmaster LU, I may hang everything so that I can adjust to 1" above to 3" below. That setup can reach 90 mph speeds, so higher mounting is possible. But for the most part, most Checkmates wont even run 85, so lower engine heights and torquemaster gear cases are best.
 
thanks, i am going to have to hook the motor to a lift and remount it, crap! when i bolted up my extra set back/jack plate , and bolted up the mid, i did not think i had to be worried monting those 2 items at the higher settings.......well i guess i should have. the highest i can get it at right now is 1 1/4 below the pad. i may never need it there, but i have a sportsmaster, and i want to be able to run it higher if needed. the angle of the transom takes away a lot of the lift with so much set back.

can anyone else help with there best set up?
 
Wildman is another person I know of that ran a 300X on a 2100 for extended periods and did some setup trial and error. I don't know where he ended up before he sold the boat though. SCT should have some input too. Since the highest you can jack it is 1 1/4 below the pad, maybe try it and see? But yeah, if I had a sportmaster and over 270 horse and a lot of setback, I'd want to get to even with the pad at least for trial runs.
 
:p i am emarassed i am in this position. the transom angle and set back takes a way a ton of the height that the 2 jack plates offer. after i bolted the mid on i should have temp. bolted the lower unit on and measured at that point. i have room for about 2 1/2 more inches in the holes in the jack plate and motor. it would have been easy enough to remount it when it was just the mid section i had to handle.

i am just mad at myself for not doing what had crossed my mind at that point.... i actually thought it would jack up too high.
 
Let's see a picture! Many jack plates give an 'automatic' rise to compensate for the transom angle. What brands are you using?
 
I have an 8" setback bracket and a 5 1/2" jackplate. I have my motor in the top holes on all. I can max out at about 1" below pad and drop to about 5"- 6" below pad. I realized my best speeds at 1 1/4"- 1 1/2" below pad and just over 1/2 trim(9/16 - 5/8).

Generally the more setback you have the higher you can jack. The water after it breaks past your transom will rise the the natural level so if you add setback you are moving your motor to deeper/higher water.
 
For an ultimate sweet spot. You'll want to jack as high as you can and still maintain water pressure/temp and your rpms and speed should be consistent. If you notice rpms going up and speed not increasing or decreasing. You know you're at a height that is not very efficient.
 
You must log in or register to reply here.
Back
Top