1995 seadoo sp's run for 5 minutes

[Hopingforthebest]

Just picked up 2 1995 seadoo sp jetskis that run good for 5 minutes. They start up every time but don't run for long. Jet skiis are new to me. was thinking of going through the fuel system of course but wondering if i should even bother with rebuilding the carbs or just replacing them. Thanks for the input

 

[dannyual767]

Re: 1995 seadoo sp's run for 5 minutes

I think that it's mandatory to rebuild carbs with genuine Mikuni parts after purchasing used skis. Unless you personally know the seller, you simply don't know the history of the ski and in particular, the carbs. Since the carbs carry the lifeblood oil and gas to the engine, you absolutely want to be sure that there are no problems there. Many a jet ski engine has been trashed due to bad carbs.

Can you give us more details on your 5 mins skis, please?

 

[timmyboy76]

Re: 1995 seadoo sp's run for 5 minutes

with the skis running, and then falling on their face, you'll NEED to remove the carb/s on each. Whats happening is, the filter inside each carb, is plugged up with crap, from the fuel lines deteriorating. Get 10-15ft of fuel line and replace on each ski. Also, you'll want new Mikuni diaphrams. No need for an entire rebuild kit, just the black circle disk/diaphram. More than likely, their not plyable anymore.

Replace that along with the fuel lines and clean out the fuel selector switch..(on,off,reserve switch), and you'll be good to go. You'll see all the crap in the filters and the blue/green slime at ends of fuel lines.

 

[Hopingforthebest]

Re: 1995 seadoo sp's run for 5 minutes

Thank you guys for the reply. Only info i got on them was that they cut off after 5 minutes. I'll get on the job once i get the carb kits in. Someone mentioned i should opt for the OEM carb rebuild kit. Is that necessary? I also read 1/4" fuel line is what is calls for. Im shopping online right now for a spool of it. Thanks again.

 

[timmyboy76]

Re: 1995 seadoo sp's run for 5 minutes

no need for shopping online. Go to local auto store and get 1/4in fuel line..$1.00ft. Also, get MIKUNI diaphram only, no need for rebuild kit, unless you like wasting money. While ur at the auto store, rent a compression tester, and see what your cylinders are banging at...150psi is new, nothing less then 110-120psi.

http://www.ebay.com/itm/Mikuni-Diap..._Watercraft_Parts&hash=item3cce2f9f58&vxp=mtr

 

[Hopingforthebest]

Re: 1995 seadoo sp's run for 5 minutes

You mean to tell me i don't need to worry about the needles and floats (blah blah) stuff that i never get right? That would be nice. I do have a compression tester i just bought. I'll check it out and post the findings tonight. WOT really matter when doing a compression test on a jet ski? I've done mostly 60's chevy's so its a little different but i can manage. Thanks 76 for the input on the diaphram. That would save me some money. It would be nice to take them out before summer was over. looks like i can now.
Hey one more question. Are stainless steel hose clamps absolutely necessary? im guessing not. Im in arizona and everything is hot as hell here. No salt

 

[timmyboy76]

Re: 1995 seadoo sp's run for 5 minutes

re-use the clamps that are in there or zipties..ya, doing compression, hold throttle wide open. Most members/seadooers run into trouble with the needle/seat assy. Installingthe "springs" that come with kit, but not realizing the springs are gram weighted. Big no no...you'll never get the "pop-off" right...Use original spring, install new diaphram/s, and install new fuel lines and be done.

 

[Hopingforthebest]

Re: 1995 seadoo sp's run for 5 minutes

Checked both skis for compression. First one was at 125 in both cylinders and the second one was at about 120-121 in both. The second jet ski started beeping while i was doing the compression test. Not sure what that means im sure i'll read about it. Also pulled off the fuel selector valve and saw it hadn't been clean off since it was dusted at the seadoo factory at the initial install. Plugs were also factory originals and in really bad condition. Im wondering how it ever ran. The tip on the spark plugs weren't gapped right and were bent in weird shapes. Also had original gray fuel lines. Im kind of concerned to reuse them cause there was so much play just turning where they were connected. Thinking of just replacing them with clamps.

 

[timmyboy76]

Re: 1995 seadoo sp's run for 5 minutes

yup, replace the grey fuel lines. The ones labeled...on / res, from the fuel baffle..(located on tank). Them lines go to the fuel selector switch. Then from switch to inline filter. From filter to carb. No need to replace the "vent" and return lines, since theres no pressure of fuel, layn dormant...The clamps, if you want to, but zipties work just fine. The fuel pump is on the mag (front) carb, so all fuel "delivery" is on "suction" side...no pressure. Compression a little low, but workable...

 

[Hopingforthebest]

Re: 1995 seadoo sp's run for 5 minutes

yeah tb76 that makes sense about the pressure lines. I priced some 1/4 fuel line at the autoparts store and they wanted almost 2 bucks a foot. Im not a cheapskate when it comes to parts but some of these prices at checker/oreilys is ridiculous. They switched out all their old stuff for chinese parts and want to charge more. I ordered a 25ft spool off ebay for 21bucks free shipping no tax. That should be enough to cover both if i only change the necessary ones. Both diaphrams are in the mail. And Im picking up the spark plugs tomorrow after work. NGK BR8ES seems to be the stock choice. Also going with some clamps, i know its not necessary but i'd like to make sure when it comes to the pressure lines. I thinking about how a little gas and heat over time might wear the ties away. And i don't want to find that it happends in the middle of the lake summer after next. Guess i could look for metal zip ties but then there goes trying to save money.

 

[Hopingforthebest]

Re: 1995 seadoo sp's run for 5 minutes

I ended up ordering stainless hose clamps from the same company i ordered the fuel line from. Not a bad price at .39 cents a piece. They threw them in and didn't charge tax or shipping. Company was called ocapindustries.



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