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  1. #1

    Gap between engine and coupler shroud

    Hey all, first post! I've spent the winter/spring tinkering with my girlfriend's old jetski and thanks to this forum's advice (triple output fuel pump mod among things) she's coming along well. My question concerns the attached photo - there's about 1/4" gap between the engine and the coupler shroud which exposes the bearing, and i have a strong feeling the shroud ought to butt against the engine. Can someone confirm this, and tell me how this gets adjusted? Is it a simple case of loosening the shroud clamps and moving it over, or do i have bigger problems?

    Thanks,
    Chris
    Click image for larger version. 

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  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Welcome to the hulk

    Your photo is very dark and hard to see.

    There is normally a gap between the plastic shroud for the drive coupler and the engine. The cover snaps into a groove on the bearing carrier, so it normally positions itself properly.

    The actual through-hull bearing (which the coupler cover snaps on to) should not have any play on the driveshaft. If the bearing carrier can be wiggled around by hand, then it is likely the internal bushings need to be replaced, along with the shaft seals.

    What is important is that the engine be properly aligned with the jet pump, and the drive shaft ends have the small rubber bumpers in place.

    Has the engine been removed from the hull? Has the jet pump been removed?

  3. #3
    Quote Originally Posted by K447 View Post
    Welcome to the hulk

    Your photo is very dark and hard to see.

    There is normally a gap between the plastic shroud for the drive coupler and the engine. The cover snaps into a groove on the bearing carrier, so it normally positions itself properly.

    The actual through-hull bearing (which the coupler cover snaps on to) should not have any play on the driveshaft. If the bearing carrier can be wiggled around by hand, then it is likely the internal bushings need to be replaced, along with the shaft seals.

    What is important is that the engine be properly aligned with the jet pump, and the drive shaft ends have the small rubber bumpers in place.

    Has the engine been removed from the hull? Has the jet pump been removed?
    I attached a clearer picture. Neither engine nor jet pump has ever been removed. Everything feels solid, just dirty. Rodents infested it while it was kept outside uncovered for almost a decade. They didn;t eat any wires or foam, just left enough nesting material and nuts to fill a few pillows...
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  4. #4
    BlueFishCrisis's Avatar
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    Welcome to the Hulk!

    That gap looks normal. The shroud is there to prevent grease from slinging everywhere and to keep loose wires and or hoses from touching the spinning coupler. It does not protect / seal any bearings.

    Do yourself a favor and replace the needle style grease fitting on your through hull bearing carrier with a standard grease zerk and make sure it is pumped full of grease. This is important for lubrication and water intrusion prevention. It is visible in your photo on the right side just above the hose exiting the water rail....
    Last edited by K447; 05-13-2013 at 08:49 AM.

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by clb393 View Post
    ... Neither engine nor jet pump has ever been removed.

    Everything feels solid, just dirty. Rodents infested it while it was kept outside uncovered for almost a decade. They didn't eat any wires or foam, just left enough nesting material and nuts to fill a few pillows...
    Hmmm, rodents living inside the hull

    Have you also checked every water hose for signs of chewing?

    Creatures can crawl up the exhaust into the waterbox. Might be worthwhile to remove the large exhaust hoses and check for signs of creature debris in the exhaust.

    Jet pump removal. Now should be a good time to remove the jet pump and inspect the jet pump bearings, check the drive shaft and through hull carrier, and grease the driveline splines, etc. Install a Zerk grease fitting in place of the OEM needle grease fitting.

    See my signature links for other common maintenance items.

  6. #6
    Quote Originally Posted by K447 View Post
    Quote Originally Posted by clb393 View Post
    ... Neither engine nor jet pump has ever been removed.

    Everything feels solid, just dirty. Rodents infested it while it was kept outside uncovered for almost a decade. They didn't eat any wires or foam, just left enough nesting material and nuts to fill a few pillows...
    Hmmm, rodents living inside the hull

    Have you also checked every water hose for signs of chewing?

    Creatures can crawl up the exhaust into the waterbox. Might be worthwhile to remove the large exhaust hoses and check for signs of creature debris in the exhaust.

    Jet pump removal. Now should be a good time to remove the jet pump and inspect the jet pump bearings, check the drive shaft and through hull carrier, and grease the driveline splines, etc. Install a Zerk grease fitting in place of the OEM needle grease fitting.

    See my signature links for other common maintenance items.
    Thanks guys, great advice!

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