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View Full Version : having problems with my 1991 Mirage Jaguar Ski Racer please any help is appreciated



delcak705
03-21-2011, 07:09 AM
after 60mph the boat starts to bounce and wont stop until im at WOT and trimmed out a lot. is there a problem with the bottom of my boat are is this how it will ride.

laglass69
04-08-2011, 02:11 PM
Mine does the same thing...these types of hulls will usually do that until you get enough speed and trim to pack air under the hull then it will usually settle down and really fly. But engine height, set-back and the style of your prop have alot to do with it. What setup are you running?

delcak705
04-10-2011, 08:33 PM
im running a 2.5 efi 280 with 15" mid turning a 14.5 x32 HOSS Triton and a 14.5x32 cleaver set back 10" and prop shaft is even with the bottom of the hull. at about 105-108 mph the bow falls down like it would fall of the pad.. cant figure it out... thanks for the reply...

laglass69
04-12-2011, 10:25 AM
Your describing two different problems. As far the bouncing at 60mph, These boats need tail lift so the cleaver usually runs the best. I find they dont like alot of set-back either. Im running a 280 with 20'' mid with 6'' set-back turning 14.5x28 and 14.5x30 cleavers, prop-shaft is 1'' above the pad. Mine will start bouncing around 60mph and usually settle down in the mid 80s but it never falls off like you're describing. Take a straight edge and check the last 5 feet of the bottom of the hull, shouldnt have more than about an 1/8'' high/low...if its good I would play with your set-back and engine height. Now for falling off around 105 mph, Could be the prop blowing out because of too much pitch or the lower unit blowing out also...What lower are you running? and what kinda rpms are you turning at 105-108mph? Does it happen with both style props?

laglass69
04-12-2011, 10:29 AM
Also you might wanna repost this under the props,setup and rigging category...You will get alot more responses than under custom rigging and metal fabrication.

delcak705
04-17-2011, 08:52 PM
im turning about 8200 rpm and doing about 105 and it seems like it falls off the pad and then the bow falls, its kinda scary. but im about a half to 1 inch above the bottom of the middle sponson, i also noticed that the middle sponson is about 1 inch lower then the side sponson. its a Mod Vp bottom i have on my boat. the boat is actually faster with the Hoss Triton. it does the same thing at 112mph...

laglass69
04-18-2011, 04:26 PM
Sounds to me like either the prop or lower unit is blowing out or you have a hook in the bottom of your boat....Certain props can run higher than others before blowing out (catching air). Same thing with lower units. What lower are you running? sportmaster? CLE?

delcak705
04-18-2011, 09:28 PM
im running a sportsmaster lower unit with a Hoss Triton 14.5x32 and a 14.25x32 cleaver by DAH props theres no Hook in the pad the bottom is straight and all new, solid as a rock and new transom. motors turning 8200rpm and still pulling when it falls.

BeefKid
04-18-2011, 10:09 PM
IMO your too low(propshaft wise) 10" plate is fine if not need more buddy runs a 12" on his and it runs 115 with a 260 especially with the sporty i would go UP and find you an et or chopper...

delcak705
04-19-2011, 06:42 AM
i have both a chopper and an ET Drag both 14.5x31 and im turning it 8700 rpm and they both fall at about 105mph and i was about 1 inch higher so droped 1`inch and picked up to 109 so going up is not the answer, but thanks anyway!!

delcak705
04-26-2011, 06:40 PM
just wanted to say thanks for all your help but i have solved my problem, it was a Torque Tammer that don the trick, now im shutting it down at 120 and its still pulling, im not used of that fast on the water. but ill get used of it. thanks guys.....

strongback
05-13-2013, 07:01 PM
Hey guys, its been a while since this was started but wanted to see if the torque tamer was added or taken off. Thanks!

toyomirage02
05-14-2013, 12:24 AM
im positive it was added, and for him not needing to go up was also not right they like to be high untill they blow out,

strongback
05-14-2013, 07:01 AM
im positive it was added, and for him not needing to go up was also not right they like to be high untill they blow out,

Hey man, Thanks Toyomirage. Any chance you could give me a clue on what to expect with a mirage ski racer? Im picking one up this weekend that has 2.5 225hp. Just wondering whats the trick with that hull...I am coming from a Hydrostream HST. Thanks again for the reply. My email is strongbackmfg@gmail.com