Martini not very well - rattling Opti

[martini]

On my way to Sark on saturday, saw someone I knew, went alongside him and gave the motors a handful of reverse to stop. (twin Optimax 225)

The moment I did this, the starboard motor started to rattle really loudly. Wondering what I had done I stopped the motor, took off the cowl and had a look around for anything unusual.

All looked ok so I restarted the motor and had a look to see if I could find where the noise was coming from. Couldnt tell much except it seemed to be internal.

Nothing much I could do so refitted the cowl and carried on. Sometimes, under load, the noise would almost dissappear but after a further 40 miles or so before I got home it didnt get any better or worse.

I figure if it was a big end bearing that had spun etc., it would've completely destroyed itself by the time I got home so maybe the lower crankshaft bearing? Any other ideas anyone?

[Polwart]

Martin,

I seem to remember some people had problems with bolts failing (was it alternator? or compressor?) on optis - not sure if that would give you the sort of rattle?

A search should find it - I think Bruce Hawskter (sp?) had the problem - but others then said they had too although memory is vague?

[Nos4r2]

Originally Posted by martini

On my way to Sark on saturday, saw someone I knew, went alongside him and gave the motors a handful of reverse to stop. (twin Optimax 225)

The moment I did this, the starboard motor started to rattle really loudly. Wondering what I had done I stopped the motor, took off the cowl and had a look around for anything unusual.

All looked ok so I restarted the motor and had a look to see if I could find where the noise was coming from. Couldnt tell much except it seemed to be internal.

Nothing much I could do so refitted the cowl and carried on. Sometimes, under load, the noise would almost dissappear but after a further 40 miles or so before I got home it didnt get any better or worse.

I figure if it was a big end bearing that had spun etc., it would've completely destroyed itself by the time I got home so maybe the lower crankshaft bearing? Any other ideas anyone?

Aren't they still under warranty?

[codprawn]

Doubt it's the powerhead - more likely prop/gearbox related.

Could even be mountings or brackets. How much did the engines kick up on reverse? How much throttle did you give?

[tim griffin]

I had the compressor bearings go also alternator bracket bolt and belt tensioner spring

If compressor take cowl off stick a screwdriver on the unit and stick your ear on it you will know if it is wearing .


Could be gearbox if only happened after whacking it in reverse .

How old engines ?

If in doubt get the mech to look it over as only guessing and going from my own experiences.
Tim

[Channel Ribs]

I hope it is nothing too serious.

Mel said she thought she saw a big RIB to the south might have been you? We were on the way back from St PP.

[Erin]

You must have been a bit off course if Martini was in Sark

[Channel Ribs]

Originally Posted by Erin

You must have been a bit off course if Martini was in Sark

We came back a fair bit to the south of the straight line course, plus Martini II does have quite a distinct profile. (Mind you, with my eye sight it could have been the Commodore Clipper for all I know!)

[Erin]

Originally Posted by malthouse

(Mind you, with my eye sight it could have been the Commodore Clipper for all I know!)

Yep, easily mistaken After a day in Guern, you can be forgiven for hallucinating. Both are desirable vessels mind you. One quite cool and fast, but the other has a bar on board.

[Channel Ribs]

Originally Posted by Erin

... the other has a bar on board.

I think that qualifies as giving him ideas!

Seriously though, I hope the engine is ok and that it was just a lose bracket.