10 tunnel hull cougar cub help

[racecar001]

wow burn the boat I just got um no thanks... didnt they used to race these things ? I cant imagine they all just flipped over ... maybe I am doing something right it seems fine at 25mph turns fine and is stable when turning... hence why I am asking for positive help on making it go faster. so if I jack the engine up a bit the cleaver should work better?

[Mark75H]

wow burn the boat I just got um no thanks... didnt they used to race these things ? I cant imagine they all just flipped over ... maybe I am doing something right it seems fine at 25mph turns fine and is stable when turning... hence why I am asking for positive help on making it go faster. so if I jack the engine up a bit the cleaver should work better?

Just because something was raced does not mean there were no restrictions, in fact most racing is highly restricted.

If you jack it up you are asking for trouble. 25 mph is THE speed, faster is trouble; the power you are already using is more than enough and the set up is right ... that's why you are still dry and not in the hospital.

They were raced, but with low power and NOT JACKED UP.

[AFTERU]

This hull does 24.3mph on gps with stock 9.9omc w/15" mid,tilt pin in 3rd hole in,the hull is designed for 20"mid,your xd is 20",I agree w/Fred you need to jack that motor,way up....because this is a true tunnel w/ no center pod and it gets no air under till about 40+mph,your water line is at the bottom of the tunnel not the bottom of the sponson....@ this time keep the load light 3gal. can max,small if no battery,no fat friends etc.....if you need more info I need a pict of your exact set up and your weight.....very fun boat,still have mine,watch the turns!!!!

[racecar001]

thank you AFRERU... if you dont mind what is your email I can sen you some pics.

[JohnsonM50]

ok well 50mph is not realistic.... my setup as is 25 merc 14p stock prop 5500rpms 25mph or so...I also have a ron hill cleaver 17p and it is slower with more rpms.... it should go faster then that right? the engine is mounted on the transom and the prop shaft is about 2" below the bottom of the boat, also I have tried a whale tail it helps on take off but hurts top speed by 3mph or so. any advise would help a

If your stock prop does 25 or so and a more pitch prop does more Rs and less speed then its probably not hooking up fully. Is the cleaver a race prop or a hi perf. sport type? You need to know if its a surface prop or not to know if its too deep or shallow. In alot of cases when your not dealing with overwhelming HP the lesser pitch will accelerate better and be faster. I think from experience with your average 25s that 35 mph maybe more is possible, try different setups, note results. I like to make 1 change at a time so you dont guess as much if something works, or not. Good luck.

[JohnsonM50]

If your stock prop does 25 or so and a more pitch prop does more Rs and less speed then its probably not hooking up fully. Is the cleaver a race prop or a hi perf. sport type? You need to know if its a surface prop or not to know if its too deep or shallow. In alot of cases when your not dealing with overwhelming HP the lesser pitch will accelerate better and be faster. I think from experience with your average 25s that 35 mph maybe more is possible, try different setups, note results. I like to make 1 change at a time so you dont guess as much if something works, or not. Good luck.

I was writing this when Rons post came up, I dont know about the boat but would take serious the advise given. Not much more fun than a fast boat that can deliver and still be able to handle adversity, Ive been lucky with my Airborn and Bezoats. Maybe put a put-put motor on it and get another.

[john miffco]

as stated the hull was designed for a 15
20-25 mph for a childrens learning class,,,,mini mouse/mini mini gt type class
most were run with 25s as a play boat 25-30

can make it run fast with the motor combinations i stated
but then it becomes a serious driving boat over 30
as others said they dont turn,,,,,,,,,,,,
and so short,,,,gotta keep the transom weight light and bow down

sounds like the motor is too deep
water needs to be following below the cavitation plate
if whaletail slows it down this means it is dragging water,,,,,,,,
it should not touch water while in plane at speed

as ron said dont raise it NO higher than the proper height
of water just below cavitation plate
need all prop in the water possible to stay safe
we have a 12' scat cat with 25 merc on it it does 32-36
all stock
so properly set up you should see them speeds

is there any racer in his area
to give him some help and guidance????????
best to be set up right and be safe
no matter what size or speed is ran
john

[JohnsonM50]

I used to run a 72 OMC 50 hp on a 15' aluminum boat [the boat is well built and HD]. Had a hard time tracking straight cause it would porpoise/propwalk/ twist in sort of a rythem that I would sorta even out a little by moving the wheel in sinc. Turns out a whale tail was the ticket, the boat went a little faster just for tracking straight and leaped onto plane too. Yours mustve been dragging.

[WillySteve]

I am looking to get some where around 50-55mph out of this boat... what would be the best power option ? it would need power trim and a 15" mid other then that light as possible.. 25hp is not cutting it

My 10' Cougar Cub has an '85 25hp Merc...runs 38mph on it's on and 59mph GPS on the bottle!! Solid mounts on engine, a 10" Bob's jackplate and a SS Power Tech prop mandatory!
It handles like a dream and a TON of fun!!!!!!!!

[champ20B]

I am looking to get some where around 50-55mph out of this boat... what would be the best power option ? it would need power trim and a 15" mid other then that light as possible.. 25hp is not cutting it

I have seen these before, though rarely. They look like a miniature version of an off-shore cat hull race boat (the kind millionares drive). The fact is though, these boats were not really made to be run in high water at all. The tunnel is more about getting a bit of speed from a mild powered outboard of the higher duty portable class (15-25 hp). Most of all, as a racer it was likely a novice type competitor. This would be more of a safe, family fun category of racing that could be a good introduction for practice of rules and sportsmanship. Like anything, it could be rigged and souped up to run fast, but a good idea would be to fix it up real nice and correct with the right intended motor. You see, what you have is a potential collectors item that you could sell later on and find a good deal on ,lets say, a nice classic "C" runabout (center fin) with a good mark 30H merc or YAMATO 102 or 302.