Dominator 12-S?
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Dominator 12-S?

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    Junior Member sleeksport's Avatar
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    Default Dominator 12-S?

    New to the site and just bought an 81 sleekcraft sportster with a stock rebuilt 460 and as far as I can tell a dominator 12-S jet drive. I'm new to jet boats and don't know too much about jet drives yet. The suction housing says it's a dominator 12-S and I can only assume it's a dominator jet. Some input would be greatly appreciated. I've only had it out for about an hour and it was dropping oil pressure at wot so I just putted around mostly...when I did have it opened up it was only able to hit 48mph on gps. Seems a bit slow for what it is...plan on going through the pump this winter..any advice on what's good to do to these dominators since I will have it apart?

    Sent from my XT1254 using Tapatalk

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    Senior Member jetboatperformance's Avatar
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    You are correct your boat is equipt with an early Dominator (mar bud) , Very good jet , Vewry similar to Modern Dominators ,Berkeley and other mixed flow jets like Legend and Aggressor, your speed of 48 is not too far off what would be expected of a Larger Cay cruiser , obviously time to get some attention paid to the oil pressure issue , might think about freshening the jet while the boat is down for the engine work Tom

  4. #3
    Junior Member sleeksport's Avatar
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    Quote Originally Posted by jetboatperformance View Post
    You are correct your boat is equipt with an early Dominator (mar bud) , Very good jet , Vewry similar to Modern Dominators ,Berkeley and other mixed flow jets like Legend and Aggressor, your speed of 48 is not too far off what would be expected of a Larger Cay cruiser , obviously time to get some attention paid to the oil pressure issue , might think about freshening the jet while the boat is down for the engine work Tom
    Thanks for the reply. With the exception of a droop or a diverter is there anything I can do to help with performance when I tear into the pump? Also do you know if the "A" stamping after the serial number on the suction housing is for the impeller?

    Sent from my XT1254 using Tapatalk

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    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by sleeksport View Post
    Thanks for the reply. With the exception of a droop or a diverter is there anything I can do to help with performance when I tear into the pump? Also do you know if the "A" stamping after the serial number on the suction housing is for the impeller?

    Sent from my XT1254 using Tapatalk
    Freshening the pump including inspecting and replacing worn or damaged parts is basic stuff and will help performance a diverter is a must, a droop may or may not be in order on that hull , the "A" designates the impeller cut the jet was originally produced with (and likley has)

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    Just Me snoc653's Avatar
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    Dropping oil pressure with rpm increase could be a spun bearing. Be real careful with that engine until you get it looked at and the oil pressure issue fixed. If it is just starting you might get by with just new bearings. If it gets too bad, it will get into the crank or cam depending on which bearing is bad.
    So many projects, so little time

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    Junior Member sleeksport's Avatar
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    Quote Originally Posted by snoc653 View Post
    Dropping oil pressure with rpm increase could be a spun bearing. Be real careful with that engine until you get it looked at and the oil pressure issue fixed. If it is just starting you might get by with just new bearings. If it gets too bad, it will get into the crank or cam depending on which bearing is bad.
    Thanks for the advice. Found a loose wire going to oil pressure sensor and oil pressure is about 60psi wide open now.

    Sent from my XT1254 using Tapatalk

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