I have a 1996 Sea Doo XP and I am considering changing sponsons to a more aggressive type. I want to rip turns.. What do you think? Tommy Tommy,
Handling is with out a doubt one of the top priorities in personal watercraft Seadoo performance. With the speeds and cornering abilities of today's runabout jet ski's, improved handling will give you a greater advantage over your competitors. since every Sea Doo rider has his own ideas about what handles best, experimenting with different Sea Doo sponson positions is your best bet for harder, more aggressive cornering. Tech Talk
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I own a 95 Kawasaki 750 ZXI Jet ski. What can you suggest to cure porpoising in choppy watter? The ski is stock and ridden on the area lakes in KS. We rarley ride 2 up. RJ RJ,
To cure the problem on your ZXI is to replace ride plate. A couple that worked good on ZXI were Shredmaster ride plates and Aggresser plates. Also a top loading intake grate and Aggresser Sponsons will help cure the problem. Tech Talk I own a 1994 Sea-Doo GTX on which it has a Factory Pipe ECWI exhaust system, Flame arresters, Solas 14/19 Impeller, and a DCT sports thrust cone. The boat runs great and I am happy with the results of the modifications I have made so far, but I have heard the sea doo manifold can crack with aftermarket air filters. I am wondering if this is a concern with the 650 motor in my boat. I had to remove the stock carburetor support bracket to install the aftermarket filters, Could this cause a problem? Art Art,
There has been a problem with the '94 Sea Doo manifolds cracking, especially when the support bracket is removed as required when installing Ocean Pro Vortex flame arresters. There is a cure for this problem. You can make a bracket arm that fits in old mounting holes in head and bent it up to meet up to one of bolts on top of filter. You can find a 1/8 x 1/2 x 12 aluminum bracket at your home depot. You will have to bend it, drill holes and bend it to fit but its a pretty easy fix. Hi Guys, I own a 1992 Sea Doo SP, which I love, To give it some boost I have made several modifications. My Sea Doo has a Skat-Trak 15/20 impeller, Aftermarket head with 31cc domes, Westcoast pipe and waterbox, one mikuni 46mm carb, aftermarket flame arresters, an MSD rev limiter (7500 RPM), stock timing, stock cylinders, a top loader intake grate, and a modified rotory valve. I pre-mix 40:1 and use NGK spark plug BR8EV and92 octane gas. These mods were great at sea level, but now I run at 4,000 feet. The low end is extremely sluggish and I dont rev more than 5900 RPM full throttle. I tried to adjust the idle and low screws with a little success. Are my mods in sync with each other? What should be my idle RPM. Oscar Oscar,
Your SP is suffering from a rich condition and loss of head compression. I would recommend changing the head compression domes to bump up compression aprox 40lbs and re-jetting the carbs for the altitude. Tech Talk I got a simple highly effective tip for any watercraft enthusiast. You know how sometimes hose clamps seem to build up surface rust and corrosion on them. WD-40, silicones, oil and other light sprays just wont do the job. OK heres my seceret, I use a little motorcycle chain lube on all my clamps. The chain lube stays on the clamps band /screw and keeps them from getting exposed to salt water and other nasty stuff. It also helps the screw turn more freely, on or off. Thats it, simple and effective. Thanks and hope you like my suggestion. Steve, Steve,
Thats a great suggestion and we like when tricks are sent our way! Tech Talk, I have a 93 Kawasaki 650 SX stand up that I have been using for pulling a wakeboarder. I know, i know, not to smart, but it works great! All except for the slight hull crack I noticed by the rear outlet exhaust hole. What should I do? Take it the shop and have them charge me $$$$ or can I fix it well enough on my own? Thanks for your help! BMan Bman
if you are not concerned too much with cosmetics, I would remove the fitting and repair the area myself. duroglass and bondo are two companies that make two-part repair mixes for fiberglass. Follow their instructions and work in a well ventilated area. If you want it to look "factory-new" you better head to the body shop. Tech talk I have a pair of 97 Yamaha GP760s that my wife refers to as :the twins" I would like to know how how I can eliminate porpoising of these boats. What effect would replacing the stock steering nozzel with an extended one have? Eric Eric,
Extended steering nozzles would indeed help reduce the tendency for a craft to "porpoise"... as would an extended ride plate. however, I believe the GPs have adjustable trim positioning on the left handlebar that should be able to set to a more comfortable ride. Trim "down" for take off, especially with havier loads, such as kids and/ coolers on back. and "trim "up" once underway for speed and less drag on the PWC. If " porpoising" present, go one "click" down at a time until smooth riding. Tech Talk I have been searching for a way to increase the horsepower on my 1996 Sea Doo XP and 95 SPI. Can you make some suggestions? I have seen some bolt on applications in this Tech section in the past. Please help, starving for more power. Jack Hi Jack,
If the Seadoos you speak of are "stock", a power increase should be easy.. Free-Flow flame arresters, ect. are the quickest performance mods you can make. Its also important to remember the performance of the jet pump, especially as personal watercraft get a little older. The impeller clearance is VERY important to the performance as well as the condition of the seadoo impeller itself. Only after proper inspection and service can you be assured the Sea Doo jet pump is up to spec. Tech Talk I'm wondering if you can help me with a problem i'm having with my 97 seadoo SPX. Even after my Sea-Doo has run for a while, If i try to take off from and idle speed and "floor it" it will hesitate before it actually takes off. Sometimes if I dont let off a little bit it will cut out. I was wondering if the carbs were running lean? I was also thinking of installing a primer kit to help it start. If I do this, How do I adjust the carbs> Also, can I lower the pop off pressure to 15psi, and do I do that by cutting one coil from spring at a time? kyle Kyle, It sounds like the pop off pressure in carburetor is to high or carb is dirty and you may be running to lean. Lower th pop-off pressure to 20psi by cutting one spring coil at a time. Installing a primer kit is a good idea and not only will help with starting, it will give better performance when butterfly's are removed. I would recommend richen the carb by turning the richen screw 1/4 turns out (counter clockwise). You might as well add some aftermarket air filters if you are to go this rout.
Tech Talk I recently moved from Blyth, California to Lake Tahoe, Nevada and I am enjoying the really cool ride spots in my new area. My friend and I both have Yamaha GP800's, but his is a lot faster than mine. Both our boats are totally stock. My friend says mine is a California model, something about emissions or something, what gives? Jerry Jerry, Haven't seen any difference in a California model in regards to performance. But, If your friend bought his Jet ski in Tahoe his might have came with a high altitude impeller which would have better performance.
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