Help with outboard choice for yacht, please.

alahol2 said:
For many years we ran a Yam 9.9 longshaft with remote throttle and gears, which could be connected to the steering, on a 32ft cat. I can genuinely say that I never once wished for more power. They are brilliant engines.
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And, I believe the Yam 9.9hp can be upgraded to 15hp by way of a different carb. Unfortunately, the prop size/clearances remain the same so may be unable to use the extra power
for displacement boats.
 
Yes. The 2 strokes often with reed change and/or carb change . Four strokes carb/jet change.
I wonder if anyone has managed to change the gear ratio on an outboard.

.
 
Snowgoose-1 said:
Yes. The 2 strokes often with reed change and/or carb change . Four strokes carb/jet change.
I wonder if anyone has managed to change the gear ratio on an outboard.

.
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Of course you could ... gears are a part of leg ... but I would assume then that cost is a prohibitive factor then.

The Evinrude Twin I bought 2nd hand in UK .... I had to shorten the leg for use on the boat here .... Service guy asked if I wanted to change gear-ratio on it ... but when we looked at the cost of even a 2nd hand leg - it came out near same as what I paid for the O/Bd !!
 
Thank you all for taking the time to make suggestions.
Two attempts to install the engine the first choosing not to bolt through the transom, big mistake!
Refitted with bolts then all good!! Engine easily lifted off transom with 2 people and put in cockpit.
We motor sailed across the Thames Estuary yesterday and the new Tohatsu was just superb running all the time at between 1/3 and 1/2 throttle. Used about 17 litres of fuel.
Stopping and going astern both very good, especially when leaving Ramsgate yesterday from a tight berth and then stopping upon arrival at Brightlingsea.
By the way special mention to Daniel and his team at Cambridge Outboards for great pre sales service.
Also to Andy our engineer.
 
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Sounds excellent maiden sea voyage.

It will broaden your range.

Btw I think we all forgot to mention that powerful outboards are superb ( when bolted on) at getting a boat off the mud - turn it at 90 deg and give it some welly and you can often literally spin the boat round to point towards the deep water and then feed it the onions and away you go again.
 
fredrussell said:
The Yamaha 9.9 high thrust is a thing of legend. The prop is just shy of 12 inches wide! Designed for displacement hulls so loads of oomph down low. Recommended.
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Hi - what ideas would you have for fitting the Yamaha 9.9 to the transom of an Halmatic 30, instead of fitting an outboard lifting plate?

The transom has an angle of approximately 45* and length to sea level of 4.5 feet.

Many thanks.
 
fredrussell said:
The Yamaha 9.9 high thrust is a thing of legend. The prop is just shy of 12 inches wide! Designed for displacement hulls so loads of oomph down low. Recommended.
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This.

My PDQ 32/34 (8500 pounds) and the PDQ 36 (10,000 pounds) are powered by twin Yamaha 9.9s in wells located just aft of midships. Because that location does not ventilate, they can power into pretty strong conditions and waves with little loss in speed. More importantly, the reverse thrust is nearly double other 9.9 outboards. I've had both, a huge difference in braking. The Yamahas will really stop the boat. But they do need to be in the water, obviously.
 
thinwater said:
... More importantly, the reverse thrust is nearly double other 9.9 outboards. I've had both, a huge difference in braking. The Yamahas will really stop the boat. But they do need to be in the water, obviously.
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Yes, if memory serves when reverse is selected the exhaust output at prop is reversed and exited forwards so the prop is biting into ‘clean’ water. It’s a very clever system.
 
J
thinwater said:
This.

My PDQ 32/34 (8500 pounds) and the PDQ 36 (10,000 pounds) are powered by twin Yamaha 9.9s in wells located just aft of midships. Because that location does not ventilate, they can power into pretty strong conditions and waves with little loss in speed. More importantly, the reverse thrust is nearly double other 9.9 outboards. I've had both, a huge difference in braking. The Yamahas will really stop the boat. But they do need to be in the water, obviously.
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Just for clarification chaps, are we talking about the Yamaha 9.9 two stroke or Yamaha 9.9 4 stroke.
Thanks
 
StUrrock said:
Thank you all for taking the time to make suggestions.
Two attempts to install the engine the first choosing not to bolt through the transom, big mistake!
Refitted with bolts then all good!! Engine easily lifted off transom with 2 people and put in cockpit.
We motor sailed across the Thames Estuary yesterday and the new Tohatsu was just superb running all the time at between 1/3 and 1/2 throttle. Used about 17 litres of fuel.
Stopping and going astern both very good, especially when leaving Ramsgate yesterday from a tight berth and then stopping upon arrival at Brightlingsea.
By the way special mention to Daniel and his team at Cambridge Outboards for great pre sales service.
Also to Andy our engineer.
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Yes Cambridge Outboards are a very helpful lot.
The only dealer that wanted to sell a long shaft outboard.
The others didn't bother to reply so if a warranty issue came up then I don't think that they would be much help.
 
Snowgoose-1 said:
J

Just for clarification chaps, are we talking about the Yamaha 9.9 two stroke or Yamaha 9.9 4 stroke.
Thanks
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Yamaha 9.9 4-stroke high thrust

These used to be (maybe still are) the standard motors on cruising cats in the 32-36' range. My PDQ came with an old pair, and I replaced them with a new pair after some years. Powerful. I measured ~ 275 pounds static thrust in reverse (two engines) and about 550 pounds in forward. Think about how much force that is (132 pounds); a 9.9 that can easily pull you right off the dock in reverse.
 
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