Motorboat replacement engines project and a bit of a refit.

I reckon you're absolutely correct! People replace leisure boat engines all the time, usually with similar power units, and nobody bats an eyelid. As for telling the insurer, my insurer never even asked what engine was in the boat.

And that's your risk. My insurer (Y Yacht insurance) did ask what engine is in my boat, and with my previous boat/policy I read their small print that said that any replacement engine should be professionally fitted.
 
And that's your risk. My insurer (Y Yacht insurance) did ask what engine is in my boat, and with my previous boat/policy I read their small print that said that any replacement engine should be professionally fitted.

That sounds rather fussy; there's no such clause in my insurance policy.
 
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Remember, the 'chief engineer' that approves a design before it is built not only is an engineer, but effectively underwrites the safety (and conformance to applicable standards) of the design before it is built, tested and used in regulated circumstances. A friend who had chief engineer responsibility had professional and personal liability with his employer to the extent that, if there had been a problem and he had been proven negligent, he was off for prison time.

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An interesting suggestion - so does anyone actually know of someone who has actually ever been off to prison for professional negligence ?
 
An interesting suggestion - so does anyone actually know of someone who has actually ever been off to prison for professional negligence ?

Depends on the effects of the negligence. If someone is injured or killed as a result, lengthy prison sentences have been handed out.

There were some notable ones in the motor/haulage industry a few year back, where even the transport manager was jailed.
 
An interesting suggestion - so does anyone actually know of someone who has actually ever been off to prison for professional negligence ?

Negligently performing a duty, resulting in a spell in the Motor Cycle Training Centre, yes. I'm not sure about run of the mill humans though.
 
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And that's your risk. My insurer (Y Yacht insurance) did ask what engine is in my boat, and with my previous boat/policy I read their small print that said that any replacement engine should be professionally fitted.

I'm with Y Yacht, yes they do ask about the engine, my policy just says "Mercedes" no other details, HP, capacity etc.

I cannot see any mention of replacement engines being professionally fitted, or, in fact, any mention of engine changes at all.
 
An interesting suggestion - so does anyone actually know of someone who has actually ever been off to prison for professional negligence ?
Convicted, can't find the sentence. In this case the window above the boiler outlet was fixed shut by the engineer, but the hotel later had new windows fitted. The Boiler was found to have been tampered with, the combustion adjustment screw was badly damaged by being turned with pliers, and consequently the emissions of CO were tens of thousands of time higher than usual. Still the engineer got prosecuted.
Cornwall engineer guilty of hotel death safety breach
 
Progress slower than I would like. Various excuses!

The pic here shows one of the replacement engines with a gearbox mounted. It's just mocked up to allow me to start working on the mounting brackets.

20210124-161841-mfnr.jpg


I'm still scourcing parts and gathering thoughts.
 
Progress slower than I would like. Various excuses!

The pic here shows one of the replacement engines with a gearbox mounted. It's just mocked up to allow me to start working on the mounting brackets.

20210124-161841-mfnr.jpg


I'm still scourcing parts and gathering thoughts.
Just a thought: that gearbox oil cooler can be fitted in place of the pipe across behind the block, rather than to it.
 
Changing engines for larger ones can have implications in some countries. Moody offered many boats with 35hp as standard or 50hp as optional extra. One UK flagged/owned boat in the process of being sold here (Portugal) to a local who was reflagging, had a larger engine upgrade sometime during it's life. The authorities spotted the engine didn't match the build certificate and demanded calculations to prove it was within design parameters. The boat was pre-RCD and it was a change as they saw it to design spec. Don't know the eventual outcome or how the problem was solved.

Although the OP has nothing to worry about in UK, don't take it for granted elsewhere.
 
Great to hear it's moving along Ben, for a moment I had thought the compliance Police had taken you off to the Tower!
Please keep posting the progress, If you need any help, just shout.
 
You will probably find that the centre of gravity of that arrangement is round about the engine back foot. A problem if on flexible mounts.
I had a four cylinder Ford Sabre with PRM box, on flexible feet, and the whole thing rotated about the after mount. I also had a raft extending a frame forward for hydraulics, I wish I had extended it aft to have a mount level with the coupling, (or even six mounts) to dampen the vibration.
I should have realised at the start, when the engine arrived, gearbox attached, I could rock it back and forth on the rear foot.
 
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