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Old 27 August 2008, 06:22   #11
Member
 
Country: France
Town: Cannes
Boat name: midkat 550
Make: apoge
Length: 5m +
Engine: 2x50 Tohatsu
Join Date: Jan 2008
Posts: 126
The pin has nothing to do with your problem, as you said that it occurs even with high trim.

Your engine was probably removed from the transom by the repair man, end re-fitted in another vertical position, too low.

This kind of problem is very frequent, as all the engine installation manual insist to install the motor with the anti-cavitation (ventilation) plate set 2cm below the hull bottom.

This is good to get a very efficient trim action, but very bad for speed and water spray because the water bangs into the leg above the plate and is sprayed vertically - and possibly enters into the motor hood.

Solution : ask to have your engine raised in order to get this plate 2 to 3cm above the hull bottom line
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Old 02 September 2008, 10:17   #12
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Country: UK - Scotland
Town: Fort william
Boat name: Scallywag
Make: Marlin
Length: 6m +
Engine: Outboard 150hp
Join Date: Aug 2008
Posts: 6
Thanks everyone for all the suggestions.

I have taken off the paddle wheel and am going to launch on thurs to see if thats cured the problem. If it hasn't I will take it out and lower the engine on its bracket.

The engineer is admamant he didn't lower the engine but we will see!


I will keep you posted and again thanks for the help.....
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Old 08 September 2008, 18:46   #13
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Country: UK - Scotland
Town: Fort william
Boat name: Scallywag
Make: Marlin
Length: 6m +
Engine: Outboard 150hp
Join Date: Aug 2008
Posts: 6
We removed the speedo log paddle wheel from just under the transom on the boat and hey presto the problem has gone away. This had been loose previously and this is obviously why. We have a plotter for speed anyway.

No water spray and boat going great. 37 knots at one point with boat full of fuel with five adults on board.

Thanks for everyones help...

Off to Skye for the weekend!
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