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Old 03 August 2018, 06:22   #61
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Country: UK - England
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New photos & info

Transom length is 570mm measured really carefully from bottom of the cutout to the bottom of the V.

Shaft length see earlier post by Charliee is apparently 635mm. It does look as though it is an XL.

The bottom of the cav plate is mounted pretty well exactly in line with the bottom of the V.

I am going to hopefully take her out later today and take photos from within the boat at test and at speed.
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Old 03 August 2018, 06:34   #62
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Standard shaft lengths are 15, 20 and 25. Sometimes referred to as standard long and extra long. At a 22 inch transom you could go either way I guess. My transom is 23 and I went long shaft as on a bracket you can alter the angle so the cav plate can sit higher. I would still talk to the rib manufacturer but my guess is you have an extra long shaft on and should have long imho
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Old 03 August 2018, 06:36   #63
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outboard looks too low as said previously, i wouldn't use it again until you speak to the dealer.

remember you need to measure vertical, not on the angle of transom though.

as your old engine was a long shaft and i assume you were happy with it that is what you should have on it again imo.
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Old 03 August 2018, 06:42   #64
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If it was me I would not use it until matters have been discussed with the supplier, IMHO you've been supplied with the wrong engine end of, as others have said you should start at 1 inch above the the line of the hull and maybe go higher. As it is the engine already looks too high, furthermore you already have issues with raising the engine and need to adapt the A frame.
Looking at the close up photo of the engine bracket it looks like the paint has chipped from the lowest hole (on the left side) indicating that the rigger may have tried this location first and for what ever reason decided not to use it.
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Old 03 August 2018, 07:45   #65
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Quote:
Originally Posted by brucehawsker View Post
Transom length is 570mm measured really carefully from bottom of the cutout to the bottom of the V.

Shaft length see earlier post by Charliee is apparently 635mm. It does look as though it is an XL.

The bottom of the cav plate is mounted pretty well exactly in line with the bottom of the V.

I am going to hopefully take her out later today and take photos from within the boat at test and at speed.
Can you also measure the distance from the top of your transom up to the horizontal parts of the mounting bracket to see, theoretically, how much lower the engine could be dropped. My thought being, if it's any more than 4" (100mm) then a "L" shaft engine is what you need. ie Would loosing 4" off the top and 1" off the bottom put you in a better place?

"Ditto" the comments regards using it. I wouldn't.
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Old 03 August 2018, 08:45   #66
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Originally Posted by brucehawsker View Post
Transom length is 570mm measured really carefully from bottom of the cutout to the bottom of the V.

Shaft length see earlier post by Charliee is apparently 635mm. It does look as though it is an XL.

The bottom of the cav plate is mounted pretty well exactly in line with the bottom of the V.
Bruce, that's exactly as it should be and you're not going to get it better by changing shaft length.

These folks telling you to get a shorter shaft can't do their arithmetic.

Also, they don't seem to understand that keeping the props in the water as much as possible will give you best overall performance.

Watch this video and note that, with the exception of when the boat actually leaves the water completely because of its speed, the drive is low enough to to keep propelling the boat, even when the hull is out of the water. The requirement is that the section of the hull rear of the bow is the running surface and if possible the hull should run and land on that.



If you go the route of lifting the engine too far, which a shorter shaft will force you to do, when your hull leaves the water you will also loose forward drive and the hull will be dead stick until it lands and the prop has time to regrip the water. During this time you will be at the mercy of the hull angle and the type of wave it lands on - it is effectively out of your control during that time. This will give you a seriously uncomfortable ride in the Solent chop. On the same tack, a propeller which can run partially surfaced without loosing grip will also help considerably in keeping the drive on giving you best performance and best ride.

Since your boat is a rib, much of its safety relies on the bow being high giving you advanced handling in following seas and steep seas. Keeping your engine low, provided it's within an acceptable range, which your is, will give you the maximum leverage at the transom to lift the bow by applying throttle so enhancing your ability to keep making progress when others are struggling.

Stick with it and learn your new engine is my advice.

It's unfortunate that the clearance with your A-frame is a nuisance but that can be resolved. And if you resolve that, you still have the ability to lift the engine one more hole should you feel it's necessary.

Go and use it and enjoy your new power.
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Old 03 August 2018, 08:50   #67
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What a lot of nonsense.....

Wrong engine end of discussion
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Old 03 August 2018, 08:56   #68
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What a lot of nonsense.....

Wrong engine end of discussion
Whatever...
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Old 03 August 2018, 09:13   #69
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Old engine was a long shaft and looks to be sitting maybe 1" above the transom so even a long shaft wasn't needing the saddle sitting on the transom to get the performance he had previously/prop deep enough. So absolutely worst case is put a long shaft Suzuki on the transom and it will be lower than what he has ever had and it gives the ability to go up if need be....no more splashing and no more hitting A frame.

You could make the current engine work but it is obvious the engine needs to go up, going down may get rid of splashing but is hiding it, not fixing it. The only way to make that engine work properly on that rib is to get a new transom put on and drill new holes in correct place (higher up)....and modify the A frame since engine will be higher than a heroin addict.
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Old 03 August 2018, 09:13   #70
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The issue is the new engine appears to be mounted too high already, this has been done to get the cavitation plate more or less level with the hull. The engine is mounted so high on the transom because the leg of the engine is too long. In order to get a sensible position on the transom it means that the engine can't be trimmed up.
Everything points to the wrong engine.
The longer its left the less likely you are to get a resolution.
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