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Old 01 January 2016, 09:12   #21
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If it helps you, I'll measure the height between the planing pad and underneath of the outboard saddle on mine tomorrow. That way you can compare your outboard height with mine (sounds like I'll show you mine if you show me yours ).
Just remembered what I promised. The distance from the bottom of the transom to the underside of the outboard saddle is 700mm, would be interesting to see if yours is similar Stephen?
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Old 01 January 2016, 11:31   #22
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Mine is an XL shaft - yours probably isn't?

Thanks for the replies, all interesting stuff. Chris, I'll email you in a bit, but the only time I would NOT get slip over 50% trim would be at speed in a straight line. Anything over 30% is and always has been pretty hopeless. I will take some measurements later and see what it looks like.

With the amount I have eaten over Christmas I think a second 150 is probably the best solution at the moment, should bring her arse down a bit though if enacted without proper consent of the financial controller it might lead to me getting a kick up mine
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Old 01 January 2016, 11:49   #23
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Some photos

First one is looking along the planing pad with the engine fully trimmed in at 0%

Second one is looking along the line of the keel in front of the planing pad, with the engine at 0%

Third one is looking along the planing pad with the engine at 25% which is where the steering is lightest - in this position the plate is more or less an extension of the planing pad on the hull.

Fourth one is looking along the line of the keel in front of the pad with engine at 25%.

Fifth one is side on view with the engine at 25%
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Old 01 January 2016, 11:51   #24
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And finally a general shot of the transom. From the top of the transom (which the saddle sits tight against) to the 'corner' where it goes onto the planing pad just below the brass bung is about 66cm.

All this suggests that the engine is plenty low enough if the ventilation plate is supposed to be 2" above the pad? I guess it is a combination of weight distribution and the minor prop damage.
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Old 01 January 2016, 13:20   #25
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Mine is an XL! Your outboard is sitting 2" lower than mine if your measurement is 660mm. I'll take some photo's tomorrow in comparison to yours.

The only difference between our Hulls is where Mike shuttered the mould to make yours shorter. So unless the hull profile is different at 5.8m as apposed the 6.2m length for mine they should be identical.
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Old 01 January 2016, 19:23   #26
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....Third one is looking along the planing pad with the engine at 25% which is where the steering is lightest - in this position the plate is more or less an extension of the planing pad on the hull....
Well that's altogether different, I'm not going back to check but didn't you give us the impression the plate was about 2" above the hull bottom?
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Old 02 January 2016, 04:50   #27
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Well that's altogether different, I'm not going back to check but didn't you give us the impression the plate was about 2" above the hull bottom?
I hadn't sat down and measured it properly at specific trim settings before. When the engine is down on shore it is usually right down (to let all water drain out the exhaust when flushing) and when you look at it quickly at 0% trim, the passing impression is that if you draw a line forward from the plate it would end a couple of inches above the height of the planing pad. It depends on what you are lining up with what, and at what trim setting, as unlike many boats there is no single straight keel line that you can align the plate with. The Vipermax keel is curved, and the planing pad tapers up towards the stern, so it's all somewhat subjective!

Anyway, I think I've established that the engine isn't too high (and probably also why the top speed seems a bit low, as if anything the engine is too low producing more drag than it should, but I'm not worried about that).
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Old 02 January 2016, 09:51   #28
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Here's a few photo's I've just taken.
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Old 02 January 2016, 09:58   #29
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The wood plank is hard up against and level with the planing pad. As you can see, my outboard is about an inch above the wood. I more accurately measured the distance from the underside of the outboard saddle to the bottom of the transom. This came in at 690mm.

I hope this helps you to compare your measurements with mine Stephen.
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Old 02 January 2016, 10:48   #30
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I set my cav plate 1inch above and was breaking out badly and top speed wasnt great. i then lowered the engine to assist in the handling and grip and went to a stainless vengeance and it converted it. Loads of grip and faster tops speed by 3 knots. I know its a different boat but lowering to 1 inch below and correct prop really worked..
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