I was just at the Boat shop today about overheating and proper motor depth. The old man told me that for 1, a jack plate on my particular boat is not possible without overheating. The water intake comes out of the water instantly on WOT. It takes less than 1 minute for the alarm to go off. So, I have to remove the jackplate and bolt the motor straight to the transom. The keel is supposed to be even with but no more than 1 inch below the anti-ventilation plate. In other words, the entire prop is to be below the keel.
Question 1) How would you get the driveway or shop floor level for proper measurement? 2) Does the jackplate have to be level? I dont know if its possible to have a level jackplate, but it was mentioned to me. 3) The steering cylinder fir the motor hits the transom if I lower it anymore. Is there a solution for this if my motor has to come down? Only have about 1 to 2 inches left. I have to double check my measurements. I have been B**Tching about not getting on pad for years. 24 pitch 4 blade prop evinrude 200hp
4 blades prop need more water...you cavitation platte as to be level with the bottom of your boat or 1 inch not more. If too hight you want be able to trim and your engine will over spine because of that lack of water.
There are so many different views on how to do this properly. I'm still confused. You are saying that your prop to pad distance needs to be "this", but another tuber says that your keel to cavitation plate need to be within an inch or less in height, and yet another tuber says you want the line up where the water comes off the side of your hull to be even or same as where your water pickups are. Pulling my hair out...lol. I have an older Basscat 93 model with a Yamaha ProV 150 on it. And it has issues coming outta the hole. So I got to looking to see if my motor was in fact too deep and needed to adjust my manual jack plate. So now more than ever, I'm a little confused...lol
Most bass boats P2P start at 3-1/3" below the pad. Come up 1/4" every run till you see a drop in water pressure or gain rpms without a speed gain. Once you reach that point drop back to the previous setting and leave it. You have to go a little too far to know where the max is. Level boat at the pad, set motor so the cav plate is level and Measure distance between pad and center of prop shaft. Test boat fully loaded, full of fuel, and water in livewells and two adults. If you set it up to run heavy it will only get better when it is lighter. Set it up light and add weight it will run like crap.
@@clearwaterfishing I know where the measurement applies. The question is WHY is it 3.5" as opposed to 4.5" of 5.5"? Whats the science that makes that distance hydrodynamically the best? I see that 3.5 and other distances mentioned on various threads. I am hoping for some cool Hydrologist's explanation.
@@Ldltv Gotcha! So there are 2 things at play here. First is drag from the lower unit. More lower unit in the water the more drag. So obviously you want the least amount of drag, but you can’t have the lower unit out of the water. You still need enough for the engine to have water to cool but let’s ignore that for now. The real limit is around the air/water surface. The more your prop is out of the water the higher the rpm of your engine. In turn you also have less water for the blade to grab. So too high will blow out or cavitate the prop. So you want high enough to run your engine in the max rpm rating. Typically in practice that p2p distance is around 3.5”. Some as low as 2”.
When do you know you have to much hook in your Stern.Do I need a propped for more Stern lift in side cup? When you get off the hot foot it feels lIke I'm being held back no gliding in. Would I be messing up if I can find someone to sand the hook down. 2002 Stratos pro XL Mercury 225 low hours Tempest 25 pitch. All stock except solid motor mounts. 12 jack plate 8" jack 4" spacer plate timhafleysr@att.net Tim Hafleysr Thanks. 256 -283 -2891
I was just at the Boat shop today about overheating and proper motor depth. The old man told me that for 1, a jack plate on my particular boat is not possible without overheating. The water intake comes out of the water instantly on WOT. It takes less than 1 minute for the alarm to go off. So, I have to remove the jackplate and bolt the motor straight to the transom. The keel is supposed to be even with but no more than 1 inch below the anti-ventilation plate. In other words, the entire prop is to be below the keel.
I would ask Jack about that.?
Get trim tabs
Great video turns out we do it the same way I have a Yamaha with a Skeeter and I run mine at 2 1/2 but we have complete different set ups…..
Love the shop man!
Thanks! It probably needs some decorations rather than just a white wall.
Question
1) How would you get the driveway or shop floor level for proper measurement?
2) Does the jackplate have to be level? I dont know if its possible to have a level jackplate, but it was mentioned to me.
3) The steering cylinder fir the motor hits the transom if I lower it anymore. Is there a solution for this if my motor has to come down? Only have about 1 to 2 inches left.
I have to double check my measurements. I have been B**Tching about not getting on pad for years. 24 pitch 4 blade prop evinrude 200hp
Also depends on how far the set back is on motor ..you got 6inch 8 inch more set backs.. like I run pod bracket with jack plate
I got a 12in pod on mine and sticking a 5 1/2in jack plate on its going to be alot of stuffing around to get mine right
Ok so then did you raise your motor an inch or so? Working on this problem with a bass tracker.
how level is the floor?
Mine is pretty level but you only need the floor level for the 2-3 ft around the motor.
setback changes the equation?...
I have a 16 ft alaluminum boat with a 70 hp with a 4 in pad to prop but it keeps a cavitation problem any ideals
4 blade prop
4 blades prop need more water...you cavitation platte as to be level with the bottom of your boat or 1 inch not more. If too hight you want be able to trim and your engine will over spine because of that lack of water.
Hi can I send you some photos I have problem to get on plane 😃
Send them to my email in the description. Prop to pad isn’t normally the problem getting on pad.
Can't find email 😔
Will prop to pad adjustment affect the steering? Like make it hard to steer at high speeds?
Nope.
May I ask what is the gap between the prop and pad meant to be.
Depends on the boat. My Nitro should be 3 1/4 to 3 1/2. That’s typical of most bass boats.
@@clearwaterfishing thank you very much.
There are so many different views on how to do this properly. I'm still confused. You are saying that your prop to pad distance needs to be "this", but another tuber says that your keel to cavitation plate need to be within an inch or less in height, and yet another tuber says you want the line up where the water comes off the side of your hull to be even or same as where your water pickups are. Pulling my hair out...lol. I have an older Basscat 93 model with a Yamaha ProV 150 on it. And it has issues coming outta the hole. So I got to looking to see if my motor was in fact too deep and needed to adjust my manual jack plate. So now more than ever, I'm a little confused...lol
Most bass boats P2P start at 3-1/3" below the pad. Come up 1/4" every run till you see a drop in water pressure or gain rpms without a speed gain. Once you reach that point drop back to the previous setting and leave it. You have to go a little too far to know where the max is.
Level boat at the pad, set motor so the cav plate is level and Measure distance between pad and center of prop shaft.
Test boat fully loaded, full of fuel, and water in livewells and two adults. If you set it up to run heavy it will only get better when it is lighter. Set it up light and add weight it will run like crap.
You want to get on pad faster, increase the hp of the motor.....that 150 is working its rear end off .......just sayin
Start at 3 1/4” for Fury
2 7/8 for Trophy and Tempest
You think I need to come up some more with 66 mph and 5650 rpm?
@@clearwaterfishing5650 is definitely on the low end. Raising up some will get you higher ram's and likely a couple more mph.
What’s the pitch of the boat when it sits in the water. Put leval on it. Then go from there.!!!!!😮
You don't explain where you get that 3.5" measurement? What's the formula that derives that distance?
Center of the prop to the pad of the boat
@@clearwaterfishing I know where the measurement applies. The question is WHY is it 3.5" as opposed to 4.5" of 5.5"? Whats the science that makes that distance hydrodynamically the best? I see that 3.5 and other distances mentioned on various threads. I am hoping for some cool Hydrologist's explanation.
@@Ldltv Gotcha! So there are 2 things at play here. First is drag from the lower unit. More lower unit in the water the more drag. So obviously you want the least amount of drag, but you can’t have the lower unit out of the water. You still need enough for the engine to have water to cool but let’s ignore that for now. The real limit is around the air/water surface. The more your prop is out of the water the higher the rpm of your engine. In turn you also have less water for the blade to grab. So too high will blow out or cavitate the prop. So you want high enough to run your engine in the max rpm rating. Typically in practice that p2p distance is around 3.5”. Some as low as 2”.
@@clearwaterfishing the proper term is ventilation not cavitation. Now you worry me.
@@itselectric3906 I think the terms are interchangeable
Just put level on bottom of boat. Not over complicate things for us. Newbies . I have dirt floor. 🎉
So if i measure top of my transom to bottom of the keel to be 17 in can i use a long 20 inch shaft or do i need to use a short 15 in shaft?
Definitely short shaft
I am speed!
Take it easy McQueen.
Yea I wouldn't go by this method..put boat in water an just look at cavation plate at wot with boat trim out nice go from ther ..
When do you know you have to much hook in your Stern.Do I need a propped
for more Stern lift in side cup?
When you get off the hot foot it feels lIke I'm being held back no gliding in.
Would I be messing up if I
can find someone to sand the hook down.
2002 Stratos pro XL
Mercury 225 low hours
Tempest 25 pitch.
All stock except solid motor mounts.
12 jack plate
8" jack 4" spacer plate
timhafleysr@att.net
Tim Hafleysr
Thanks.
256 -283 -2891
That's a Nitro it can't go fast !! #BulletBoats
Worthless waste of time