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Cat up on plane with one motor?

Old 01-11-2019, 10:48 AM
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bnz
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Default Cat up on plane with one motor?

Have a Sea Cat 223 and I have seen a number of statements about cats getting up on plane with only one motor. I've had a motor go out on me on a couple of occasions and have yet to be able to get up on plane with only one motor. My cruising speed on one motor is only 7-8 mph. Am I missing out on something? Doing something wrong?
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Old 01-11-2019, 10:51 AM
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Did you trim the other engine up and out of the water? Makes a huge difference
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Old 01-11-2019, 10:52 AM
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Yep, other engine totally out of the water... 8 mph
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Old 01-11-2019, 10:53 AM
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Mine will get on plane with one, but it takes some time and I have to trim other motor out of the water. Sea state has something to do with it to
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Old 01-11-2019, 10:54 AM
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Horsepower, prop, weight, and tons of other variables could be affecting planing.
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Old 01-11-2019, 11:15 AM
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Mine planes pretty easy on one - Prowler 246 with 150 HPDIs.
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Old 01-11-2019, 11:21 AM
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This might seem like a silly question but I've never been on a cat. Are you constantly counter-steering the boat when running on one engine? I would think it would want to go in circles.
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Old 01-11-2019, 11:25 AM
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load?
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Old 01-11-2019, 11:39 AM
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Mine does pretty easily. Im sure its not healthy for the running engine though. 33 footer with 350 yamis
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Old 01-11-2019, 11:39 AM
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Also what size twins on your boat? If twin 150s sure. Twin 90s maybe not. The smaller cats often had small twins on them. Which is totally fine when both engines are running. Planing on one small engine may not be possible in that setup.
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Old 01-11-2019, 11:43 AM
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Mine is a 23’ cat with twin zuk 140s. Boat weighs about 4500 lbs I believe.
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Old 01-11-2019, 11:46 AM
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My Worldcat 255 will plane on one motor with the other motor up. My previous cat with a hydrofoil would not.
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Old 01-11-2019, 11:51 AM
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Running a boat (V or cat) on 50% power using the same prop is very hard on the one good engine you still have. Changing props offshore is a challenge too. Big part of the advantages of triple and quad powered boats.
Keep this in mind when trying it.. If you can't back off and maintain plane once your up, settle down and take the slow ride.
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Old 01-11-2019, 11:51 AM
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Originally Posted by krocks View Post
This might seem like a silly question but I've never been on a cat. Are you constantly counter-steering the boat when running on one engine? I would think it would want to go in circles.
I thought the same thing, but no, it was pretty straight.
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Old 01-11-2019, 11:55 AM
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Is the hull totally dry? No water in the foam? Any hull compartment not draining?

Different boat but we had a grady that had a plug in the bilge that kept water forward of the rear bilge pump. The water did not reach the forward bilge pump. Found out when the boat was pulled to replace some thru hulls. Could hear water sloshing when backing up on the trailer but the thru hull plug was out. Pulled that inner plug and water ran out for 40 minutes. Left that inner plug out. The boat ran better and got on plane much easier after that.
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Old 01-11-2019, 11:57 AM
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My little corsair foiler will when light with DF-115's 14/22 pitch props. I have since re powered with 140's and have yet to try it. I am running the same props so I am sure it will.
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Old 01-11-2019, 12:06 PM
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Do you hate your motors? Why would you want to abuse them so?
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Old 01-11-2019, 12:49 PM
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Originally Posted by alloyboy View Post
Do you hate your motors? Why would you want to abuse them so?
yep, what he said!
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Old 01-11-2019, 01:58 PM
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Here's a cat up on a plane with only one motor:



Sorry - I couldn't help myself! OK, back to the thread: carry on everyone.
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Old 01-11-2019, 02:06 PM
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Go back to your other thread first and figure out that problem. You have an issue either with the engine, props, or mounting.
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