[Question] 1997 scarab jet boat
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1997 scarab jet boat

  1. #1
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    Default 1997 scarab jet boat

    I purchased a 1997 Scarab jet boat without a engine it had a Volvo Penta 4.3L and Volvo Penta pump I purchased the pto plate the damper and the hub cannot find the Bell housing out of stock no date when it will be back it has been 3 months still not in stock. Some forums say that I can convert to a INDMAR BELLHOUSING 3 point with a 1310 spicer and pto adapter the pump is 5" dia with rubber band around for 3 point spline is 1-3/8 10 tooth. Does anybody out there have the Bellhousing for the volvo pump 3858066 spent a lot on the other parts plus the converting would move the motor back. Any thoughts would be helpful

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  3. #2
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    The Volvo-penta jet was designed and built by Legend- The rights and everything else were bought by American Turbine- You might try contacting them to see what they have- that is a long shot though. As for changing it to the double U-joint style drive, it will move your engine forward a bit....Check and see if you have room- and no, I don't have actual measurements.

  4. #3
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    Quote Originally Posted by SCARAB JET BOAT View Post
    I purchased a 1997 Scarab jet boat without a engine it had a Volvo Penta 4.3L and Volvo Penta pump I purchased the pto plate the damper and the hub cannot find the Bell housing out of stock no date when it will be back it has been 3 months still not in stock. Some forums say that I can convert to a INDMAR BELLHOUSING 3 point with a 1310 spicer and pto adapter the pump is 5" dia with rubber band around for 3 point spline is 1-3/8 10 tooth. Does anybody out there have the Bellhousing for the volvo pump 3858066 spent a lot on the other parts plus the converting would move the motor back. Any thoughts would be helpful
    I may have one but I will have to confirm after looking through the parts I had. I doubt Volvo has any since they sent us the molds (cast iron matched molds) for the bell housing when they ended production. We were negotiating to buy the drive back (patterns etc.) when they told us they scrapped everything. Since there would be no follow on production by us (Team Scarab) we scrapped the bell housing molds. The Scarab Sprint was a complete package for which Team Scarab built molds for a sprint racing 16' boat and jet-drive and then Wellcraft, who was a licencee of Team Scarab, built your 19' version. About 300 were built before Volvo decided it was too small a market. The first 20 jet units were built at Legend Jet-drive (now part of American Turbine) so many of the components interchange. I will post next week.

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  6. #4
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    Default Volvo Jet in Wellcraft Scarab Jet

    I have looked through all my inventory and checked with local shops I may have given the bell housing to and no luck - sorry. Since you apparently already have the Lovejoy (rubber) coupling and spline adapter I am assuming you also have the crankshaft to Lovejoy coupling adapter (the system was designed for a automatic transmission starter ring plate). With these parts you would not need to convert to a Spicer u-joint and the extra length. One solution is to do a 4 point mount and carefully align the engine to the pump shaft. Most 4 point mount rear bell housings were for Spicer style drive lines and will be too close to the flywheel to clear the Lovejoy coupling, however there were 4 point rear mounts for Borg Warner transmissions which were approximately 3.5" inside dimension from the engine's rear bolt surface. Glenwood, Harman Marine and others built these with adjustable mounts for jet boat stringers but even the Merc style could easily be adapted. It's been almost 20 years but if memory serves me correctly the package at Wellcraft was designed to accept a 350 V-8 which was to be the next step. Critical issue is clearance to the fuel tank. If you choose to go V-8 (assuming there is clearance in your boat a production 350 @ 340-380 HP with Legend "B" impeller should give you close to 60 mph. I was present for all the V-6 225 HP tests which with the equivalent weight of 4 160# passengers and 10 gal. fuel was 50 mph. We never tested the Wellcraft 19 but the Team Scarab 17' (which was lighter and shorter) ran 62 with 340 HP.

    It would be possible to build a 3 point adapter for any Borg Warner rear mount to the front bearing cap mount surface, but it would require accurate measurements and a machine shop.
    I will be available for questions: [email protected]. Good luck!

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