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  1. #51
    PWCToday Newbie
    Join Date
    Jul 2016
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    Florida
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    11

    Re: It's not a Jetski, but it goes just the same!

    Update: Well you can take the parts manual for the Mercury Sport Jet and throw it out the window. All the parts are similar in location and type but the sizes are all wrong including the drive shaft I bought. Ended up measuring the bearings and seals and got on google and started searching and found everything I needed. The parts are all metric. Some Yamaha seals worked. I used Timken part numbers on a few others. Everything has been sanded, cleaned up and painted and now going back together. Luckily bearings and seals came out fairly easily without special tools. I am trying a epoxy paint with a hardner on the wear ring. It smoothed out the minor grooves and it will be interesting to see if its as hard coming off as it is on the garage floor. I have added a external flushing port so I can pop a hose in the back of the boat without opening the hood. i also swithed from studs to bolts to hold the stator bowl to the main assemble. It should make a future disassembly much easier. The last thing to do is take a stab at cleaning the fuel tank. I am thinking of trying a vacumn with a small hose. Anything so I don't have to pull the tank. Lots of hours involved but if I ever do it again it will go much faster.
    @kpino22 I saved all the part #'s if you decided to do your current pump. If you switch pumps let me know as the old one is a parts gold mine.impeller.jpgEngine Bay.jpgpump.jpgride plate.jpgWear ring.jpgpump cut out.jpg
    Last edited by capndans; 08-15-2017 at 10:43 PM.

  2. #52
    resident guru slag's Avatar
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    Jul 2002
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    Lawrence, Kansas
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    43
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    1,010
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    1

    Re: It's not a Jetski, but it goes just the same!

    Get a cheap electric fuel pump from your favorite auto store and use that. I had to do this on my boat and it worked great. Plus, the pump can be used for a variety of things without danger of combusing any fumes.

  3. #53
    PWCToday Newbie
    Join Date
    Jul 2016
    Location
    Florida
    Posts
    11

    Re: It's not a Jetski, but it goes just the same!

    On the above recommendation I have eliminated the primer bulb and installed a fuel pump and am finally ready to give it a try. Irma's passage through Florida took away two months of being able to mess with the project. I have removed all the old stripping as after 25 years they were finally starting to delaminate.
    I am now working to come up with a more modern look. I also added a Yamaha quick disconnect flush kit mounting it right on the back of the boat making flushing quick and easy.Deck.jpgside view.jpgJetstar 2.jpg

  4. #54
    PWCToday Guru Ol' Reliable 550's Avatar
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    Apr 2011
    Location
    Lockport, IL
    Age
    27
    Posts
    359

    Re: It's not a Jetski, but it goes just the same!

    I'm seriously considering picking one of these up in a few weeks. Is there a way to tell the difference between the 60 and 90 hp motors? The graphics on the boat are pink and teal/green. Makes me think its a 90, but the guy said it was a 60... How do these boats handle on the water?
    1993 701 SuperJet - PATRIOT SKI
    1994 Yamaha Waveblaster 2nd Owner
    1986 Kawasaki JS550 - Yamasaki 650 Conversion
    1987 Kawasaki 300sx - Group K Mod
    1990 Kawi 550sx
    - "Ol' Reliable." Caught on fire, sunk, whereabouts UNKNOWN.
    JetLark Mini Boat - Build Thread


  5. #55
    PWCToday Newbie
    Join Date
    Jul 2016
    Location
    Florida
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    11

    Re: It's not a Jetski, but it goes just the same!

    The easiest way to tell is the Merc is a three cylinder motor where the other is two. If its older than a 1991 its probably not a 90 HP.
    The boat handles remarkably well with one or two people in it.
    My top speed solo is 44 MPH.
    If it is a 90 HP a few words of caution. Get underneath with a flash light and look at the shaft, impeller, and bowl. None of these parts are available. The merc sport jet pump parts are close but different in size. Bearings, seals and the like can be found by sizing them up. They are metric. There is a single drain hole underneath by the pump intake for bowl fluid. My breather comes out by the back of the pump as a hose. Remove the screw and check quantity and color. If its brownish or none your shaft seals are gone which might mean the bearings are not in the best of shape.
    Like anything else this old your on your own other than forums like this for trouble shooting on the pump side. The motor itself is straight forward with parts readily available on the likes of Ebay.
    The 90 is a gas hog. it has a 10 gallon tank which at wide open throttle nets 45 to 50 minutes of run time. Stay below 3000 RPM and you can get two hours out of it.

  6. #56
    PWCToday Guru Ol' Reliable 550's Avatar
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    Apr 2011
    Location
    Lockport, IL
    Age
    27
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    359

    Re: It's not a Jetski, but it goes just the same!

    Quote Originally Posted by capndans View Post
    The easiest way to tell is the Merc is a three cylinder motor where the other is two. If its older than a 1991 its probably not a 90 HP.
    The boat handles remarkably well with one or two people in it.
    My top speed solo is 44 MPH.
    If it is a 90 HP a few words of caution. Get underneath with a flash light and look at the shaft, impeller, and bowl. None of these parts are available. The merc sport jet pump parts are close but different in size. Bearings, seals and the like can be found by sizing them up. They are metric. There is a single drain hole underneath by the pump intake for bowl fluid. My breather comes out by the back of the pump as a hose. Remove the screw and check quantity and color. If its brownish or none your shaft seals are gone which might mean the bearings are not in the best of shape.
    Like anything else this old your on your own other than forums like this for trouble shooting on the pump side. The motor itself is straight forward with parts readily available on the likes of Ebay.
    The 90 is a gas hog. it has a 10 gallon tank which at wide open throttle nets 45 to 50 minutes of run time. Stay below 3000 RPM and you can get two hours out of it.
    Awesome thanks for the response. The guy said it needed a new steering cable boot? I'm assuming that is where the cable goes out to the pump. Do you know if those are hard to come by?
    1993 701 SuperJet - PATRIOT SKI
    1994 Yamaha Waveblaster 2nd Owner
    1986 Kawasaki JS550 - Yamasaki 650 Conversion
    1987 Kawasaki 300sx - Group K Mod
    1990 Kawi 550sx
    - "Ol' Reliable." Caught on fire, sunk, whereabouts UNKNOWN.
    JetLark Mini Boat - Build Thread


  7. #57
    PWCToday Newbie
    Join Date
    Jul 2016
    Location
    Florida
    Posts
    11

    Re: It's not a Jetski, but it goes just the same!

    If its the Suzuki set up then this place has most of the parts:
    http://www.deckjetwatercraft.com/ult...cs/default.asp
    If its the 90 HP a Mercruiser shift cable boot or similar works perfect with a couple of hose clamps.
    The above company shows a shift boot part # 20-0515-077 that will probably work as the steering outlet is similar between the two.
    And you are correct. The steering boot keeps water from entering the hull where the cable exits the boat.
    Last edited by capndans; 02-08-2018 at 05:27 PM.

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