What power auxiliary outboard for 6.5m?

[jwalker]

Originally Posted by rbw156

....I assume that you fixed the aux to a pivoted drop plate and that while the aux was in the up position that you also had the o/b tilted up. Is this the case?

Nope. They were completey independent except when the tiebar was connected, and even then they could be tilted at will. The comment about the tilt pin indicated that the aux was not allowed to be supported on its pin whilst using the rib normally. Its mounting saddle is simply not made to take the load of the tilted motor bouncing about when the rib is riding rough water.

The support was pivoted by drilling the aux saddle low down and a pivot pin was slid through the the saddle and the support bracket. The support was made from rectangular stainless tube and it had the form of an A-frame with the top chopped off. A pin was slid through holes at the top of the frame to act as the support pin onto which the aux catch clipped in the normal way.

If you're still confused, I'll do you a wee drawing.

[rbw156]

Originally Posted by jwalker

Nope. They were completey independent except when the tiebar was connected, and even then they could be tilted at will. The comment about the tilt pin indicated that the aux was not allowed to be supported on its pin whilst using the rib normally. Its mounting saddle is simply not made to take the load of the tilted motor bouncing about when the rib is riding rough water.

The support was pivoted by drilling the aux saddle low down and a pivot pin was slid through the the saddle and the support bracket. The support was made from rectangular stainless tube and it had the form of an A-frame with the top chopped off. A pin was slid through holes at the top of the frame to act as the support pin onto which the aux catch clipped in the normal way.

If you're still confused, I'll do you a wee drawing.

No that is fine. Thanks for the advice. Rich

[IanE]

I managed to obtain the air-cooled Zong Shen 6HP Diesel Outboard, and mounted it / rigged up for electric start etc.

However..... its ugly, heavy , and after a summer on the mooring rusty/corroded.

So I think its got to be petrol after all!! ( I can hear I told you so's !!),

From reading this, and various other threads, I believe the following would sum up the advice available.

As big as you can afford/carry .... 15/18hp for 6.3m?

2- Stroke (for simplicity ?)....

Manual Start - its for emergencies

Short Shaft ( I've got a transom bracket which will suit this!)

Any comments or suggestions welcome

P.S. anyone want a cheap 62.5Kg chinese deep water mooring??

Ian

[codprawn]

Originally Posted by IanE

I managed to obtain the air-cooled Zong Shen 6HP Diesel Outboard, and mounted it / rigged up for electric start etc.

However..... its ugly, heavy , and after a summer on the mooring rusty/corroded.

So I think its got to be petrol after all!! ( I can hear I told you so's !!),

From reading this, and various other threads, I believe the following would sum up the advice available.

As big as you can afford/carry .... 15/18hp for 6.3m?

2- Stroke (for simplicity ?)....

Manual Start - its for emergencies

Short Shaft ( I've got a transom bracket which will suit this!)

Any comments or suggestions welcome

P.S. anyone want a cheap 62.5Kg chinese deep water mooring??

Ian

Would have thought 15/18 a bit big for a 6.3m RIB???

A 9.8 would be smaller and lighter and cheaper!!!

Tohatsu look the best bet of the 2 strokes.

[jwalker]

Originally Posted by codprawn

Would have thought 15/18 a bit big for a 6.3m RIB???

Nope. A 30hp was fine on my 6.5.

[xpertski]

wow, seems large for an aux, as your not able to push the boat onto the plane with an aux, surely theres little diff in say using a 20hp and a30hp (speculating as i dont honestly know) we have also been considering an aux, a yam 8hp 2 stroke for 6.3m humber, and thought that would have been ample! is it true that engine mounts for aux tend to wear, possibly come loose due to lots of movement at sea, is a way around this to keep engine in boat then put on transom if needed?

[IanE]

I can't access transom - inboard engine boxed so I got one of these