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Need some assistance

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Old 07-10-2019, 10:38 AM
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Curryfamily2019
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Hello all,first post here. My son and I just purchased a 48 catamaran style hull with a Mitsubishi t140 motor that is missing the hatch. The seller can not remember the manufacture of the hull and Im seeking info In search of a replacement. After fixing a bunch of random stuff like water lines, throttle and steering, carb cleaning, and a locked up clutch, we got to take it out on the lake behind our house.
It stalled of course since there is no cowl to keep water spray from being sucked into the carb. Also it seem like it has cavitation, pin it wide open and it revs pretty high, slowly gets on plan and the seems like the prop finally loads up the motor and it takes off like a rocket....pretty fast and fun just trying to get a more consistent action out of the prop. Anyone help us newbs?

Last edited by Curryfamily2019; 07-10-2019 at 10:56 AM. Reason: Typo
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Old 07-10-2019, 10:45 AM
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We can’t help identify the hull/hatch without pics of the boat. Ditto the cavitation, need to see how high the prop is above the bottom of the sponsons. Also need to know the prop: brand/type/sharpened?

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Old 07-10-2019, 10:52 AM
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Curryfamily2019
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The forum will not allow me to post pictures. Says Im not allowed to post url until I get 10 post. Sorry about that.
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Old 07-11-2019, 04:20 PM
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I believe I have figured out the manufacture of the boat, Looks identical t the aero marine avenger. Ive lower the prop angle and sharpened the prop which seems to have made a huge difference.
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Old 07-12-2019, 08:09 AM
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Sorry about the pic block - it can be a nuisance. Private message me the images or email (my username @gmail.com) and I will post them up for you
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Old 07-12-2019, 10:40 AM
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Curryfamily2019
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Thank you! Sending email now.
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Old 07-13-2019, 02:34 AM
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Old 07-13-2019, 02:49 AM
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As I mentioned to Brandon - this hull is actually unique as it is a trimaran hull. Gives the hull some very strange handling characteristics. I ran one for a time. Was fun but difficult. Believe Aeromarine either did a limited run or a few as a prototype.
I found it would run a bit like a vee hull until turning hard when the side "cat" hulls would grab and cause it to either spin out or turn radically different - depending on water conditions. I sold mine at least 15 years ago.

The prop on their looks like a 270 prather or Octura x470 (the number can usually be read on the hub after you remove the prop nut). I would say she is a decent prop and if you are seeing top end speed (which for most is the important part) then you may just try accelerating a little more gradually. A prop that mites more during acceleration then you may well be sacrificing top end speed.

Let us know what prop numbers you have and we should be able to steer you in the right direction.
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Old 07-13-2019, 03:39 AM
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Looks like you were spot on with the prop, it is a x470. Top speed seems okay, boat seems a tad under powered but if I do accelerate a lil slower the boat planes out nicely.
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