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Old 19 May 2012, 16:29   #11
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Yeah see what you mean peter I assume that is for adjustment purposes having it raised to allow for movement if necessary. Think a cutout is the way forward here then get my stainless man on the case for a nice plate shaped to the transom.
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Old 19 May 2012, 16:35   #12
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Cheers Edd appreciate your opinion. Do you think cutting a step into the transom is a good option?

Think I will get down there tomorrow and measure how much it needs to drop before i get the powertools out. I will go with lining the cavitation plate 1 inch above the keel.
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Old 19 May 2012, 16:42   #13
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Chopping the Transom is going to be the only option to get the engine in the right place but you risk wash coming over the back when you are at rest or coming off the plane.
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Old 19 May 2012, 17:21   #14
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Tris,

Be cautious of cutting your transom, you'll need to do a neat job and seal it well to prevent water penetration, into the tansom itself but far more importantly, as mentioned by ribraff, you'll then be at risk of swamping the boat when slowing down or with following seas. My first rib was a 5m humber that someone had modified to suit a short shaft engine, the rib was fine and a great laugh with one or two people, but when I put 3 people with dive kit on board as soon as we came off the plane the rib would flood with water almost to the top of the tubes which was dangerous. Even on a choppy day you couldn't sit comfortably and fish because waves would top over the lowered section of the transom.

My current viking tornado is similar. In reverse with the engine trimmed down the water will almost instantly flood over the transom, there is low freeboard where the design of the transom dips to accomodate the engine shaft length, however its better than the humber and actually useful for washing down the deck after fishing or scalloping :-)
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Old 19 May 2012, 17:25   #15
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Personally I'd get a longer shaft engine. You can't have too much freeboard. Chopping the transom is a copout.
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Old 19 May 2012, 18:03   #16
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Liverpool Powerboats have a pair of xl Mariner 90s that they may be converting to long shaft.

Getting the xl mid section off them would solve your problem without chopping the transom.
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Old 20 May 2012, 02:05   #17
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I did wonder if a section was available to adjust the shaft length. Thanks DM that's awesome if they have one I'll chase it up
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Old 20 May 2012, 02:53   #18
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Thanks for all the feedback guys. I am keen to keep as much transom as possible so chopping it will be a last resort. Would hate to chop it and regret it due to swamping etc.

Sent Liverpool Powerboats an E-mail and watching a Mid section on E-Bay in the US that may fit. Going to measure mine today and take a few measurements.

Be great to fit another leg and its sorted. Is all thats required is to fit the new section and a longer drive shaft?
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Old 20 May 2012, 06:41   #19
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Longer leg is way to go. But, in a situation where that would be hard/expensive to do,wonder would a transom jack be a possible as an none invasive solution? Like this : CMC Manual Power Lift Transom Jack 65012, and not that hard to sell afterwards if not a workable solution.

Guess these are normally used for lifting the engine so don't know how much You can actually lower it. On the other hand if the engine is further back you can keep it higher anyway.
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Old 20 May 2012, 07:38   #20
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Transom measured its 23 inches from the top to the bottom of the keel plate
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