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Old 29 July 2013, 09:18   #31
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Chris, Robbie Diesel and Uncle al, seconded.
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Old 29 July 2013, 10:05   #32
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If it was the case that 'stopping quickly from speed' ie either killing the engine completely or coming rapidly back to neutral from WOT (both of which are perfectly feasible and forseeable situations) was sufficient to drive water up the leg into the pots then I would imagine the manufaturers would have put some kind of reed valve in there to prevent damage.

Besides, even if the engine simply stalled with one or more exhaust ports open (without turning backwards), creating the possibility for water to enter the cylinders, I would be surprised if it would re-start at all. Even then the water would simply be ejected back out of the exhaust port from whence it came when the engine was re-started.

Looking at the photos in the OP there is evidence of corrosion in at least 4 cylinders.
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Old 29 July 2013, 10:05   #33
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Quote:
Originally Posted by Solent Ranger View Post

So be warned, stopping to quickly in a straight line can be hazardous to your engine's health and your pocket. I was taught this very early on in my boating career and told that just what happened here can happen!
I was never taught or told about this while doing my P2 course apart from checking that no one is right behind you before doing it.

If this is the case then how can an expensive outboard engine be deemed fit for purpose.
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Old 29 July 2013, 10:20   #34
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I was never taught or told about this while doing my P2 course apart from checking that no one is right behind you before doing it.

If this is the case then how can an expensive outboard engine be deemed fit for purpose.
Could be construed as misuse I suppose
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Old 29 July 2013, 11:29   #35
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Agree with the sceptics - its definitely half a story and the motor was under load.
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Old 29 July 2013, 15:46   #36
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mark241, you could well be right that there is more to this than we all 'assume' I therefore think there is too much opinion based on half the facts. Do we know if the engine was correctly mounted height wise? Do we know if the boat was incorrectly loaded? for example too low at the stern? I do know this has happened to a well known outboard brand before, due to an inappropriate sized engine being mounted to an inappropriate sized boat.
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Old 29 July 2013, 16:43   #37
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Quote:
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I was never taught or told about this while doing my P2 course apart from checking that no one is right behind you before doing it.

If this is the case then how can an expensive outboard engine be deemed fit for purpose.
I'm with you Kerny, I've towed skiers for years and had to stop suddenly from a decent set of revs, and never had that happen. Or have I been lucky, and this chap has been very unlucky?!
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