I am keen on carrying an auxiliary outboard on our Cav 30.
Not real keen on a permanent OB bracket mounted to the stern though.

One consideration is fabricating something that temporarily hangs in place if required.
The engine can hang up on the rail.

Looking forward to ideas and thoughts.

Regards
Ian

Glory. Saw this earlier but thought a bit tough to answer.

On second thoughts having owned and sailed a Cav30 for only a couple of years on SydHarbour thought it would be best to answer in good faith.

So you have a 4tonne displacement yacht.

What do you want your aux oboard to do? Punch you across Port Phillip bay back to the mooring in 30+kts and associated swell if the diesel conks out? Or just motor quietly around a protected harbour?

The outboard that comes to mind - which I have also had on a Columbia 22 - is the Yamaha 9.9 long shaft high thrust as per here

www.yamaha-motor.com.au/products/marine/outboard/high-thrust-four-stroke/t9.9

A superb outboard but it would not operate successfully if it "hangs off something fabricated". It needs to be secured to a very stout and load rated to the specific weight and thrust oboard bracket bolted onto the transom so loading through the solid hull structure- assuming the transom can take the weight and thrust including loadings in the seaways you want it to operate in. Have delivered a 1.6t 7.5m yacht with 5hp long shaft outboard from the harbour to Botany Bay out the heads in even a low swell and it was a right pain. Thankfully the breeze came in off Bondi.

Can't see this outboard stored hanging up on the rail either sorry - in a seaway the rail would fatigue and crack and fracture and the whole lot fall overboard.

But I am probably missing something in your intentions so maybe more information would be useful. What is the stern arrangement of your Cav30?

For the foreseeable we will be sailing in protected waters, Gippsland Lakes.
It occurred to me on the weekend if there was an issue, getting in and out of the marina would be very difficult.
There are quite a few boats down that way, either sail or motor with small auxiliaries.
Not sure there was anything to be missed...Simple question regardless.

Select to expand quote

Seriously said..
For the foreseeable we will be sailing in protected waters, Gippsland Lakes.
It occurred to me on the weekend if there was an issue, getting in and out of the marina would be very difficult.
There are quite a few boats down that way, either sail or motor with small auxiliaries.
Not sure there was anything to be missed...Simple question regardless.

Learn to sail onto the dock.
Pretty easy really.
Standard RYA test for a day skipper ct.
You have a great boat to do it in.

Select to expand quote

lydia said..

Seriously said..
For the foreseeable we will be sailing in protected waters, Gippsland Lakes.
It occurred to me on the weekend if there was an issue, getting in and out of the marina would be very difficult.
There are quite a few boats down that way, either sail or motor with small auxiliaries.
Not sure there was anything to be missed...Simple question regardless.

Learn to sail onto the dock.
Pretty easy really.
Standard RYA test for a day skipper ct.
You have a great boat to do it in.

Can do and have done....Strictly no sailing into our home marina. Regardless, far too tight to consider as most marinas are.
Not after advice on what to do if, seeking advice on how.

Have a look at the large electric outboards that cabin cruisers use on the bow for fishing. These lift well clear of the water when not in use.

I intend to eventually fit the 36'ers boarding platform with provision to take the 9.8 RIB motor in case anything happens to the diesel (as occurred when the starter motor died and I had to tow the boat to the marina with the RIB) so I can get where you're coming from.

Just a guess, but having had a 28fter with an inboard diesel and then an outboard, and having towed a 36'er with a Tohatsu 9.8 2 stroke, for getting a Cav 30 into marinas on a typical day a Tohatsu 3.5 screaming its guts out could do it, slowly. It's also very light and simple, probably easy to make a mount for, and would make a good dinghy motor. If you go much bigger then the hassle and loads increase enormously.

Adams 10s often use Tohie 3.5s, if I recall correctly, for getting into marinas at MHYC. Obviously there is litte reserve power for errors, but you know what already.

Select to expand quote

Chris 249 said..
I intend to eventually fit the 36'ers boarding platform with provision to take the 9.8 RIB motor in case anything happens to the diesel (as occurred when the starter motor died and I had to tow the boat to the marina with the RIB) so I can get where you're coming from.

Just a guess, but having had a 28fter with an inboard diesel and then an outboard, and having towed a 36'er with a Tohatsu 9.8 2 stroke, for getting a Cav 30 into marinas on a typical day a Tohatsu 3.5 screaming its guts out could do it, slowly. It's also very light and simple, probably easy to make a mount for, and would make a good dinghy motor. If you go much bigger then the hassle and loads increase enormously.

Adams 10s often use Tohie 3.5s, if I recall correctly, for getting into marinas at MHYC. Obviously there is litte reserve power for errors, but you know what already.

Thanks Chris....Spot on advice. We have a 4 hp merc for the dinghy.
That's exactly my thinking. Just in case....

Select to expand quote

Chris 249 said..
I intend to eventually fit the 36'ers boarding platform with provision to take the 9.8 RIB motor in case anything happens to the diesel (as occurred when the starter motor died and I had to tow the boat to the marina with the RIB) so I can get where you're coming from.

Just a guess, but having had a 28fter with an inboard diesel and then an outboard, and having towed a 36'er with a Tohatsu 9.8 2 stroke, for getting a Cav 30 into marinas on a typical day a Tohatsu 3.5 screaming its guts out could do it, slowly. It's also very light and simple, probably easy to make a mount for, and would make a good dinghy motor. If you go much bigger then the hassle and loads increase enormously.

Adams 10s often use Tohie 3.5s, if I recall correctly, for getting into marinas at MHYC. Obviously there is litte reserve power for errors, but you know what already.

I used to have a Tohatsu 2.5 modified to a 3.5. I added a Korts nozzle and this transformed the amount of thrust available.