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Old 09 June 2011, 18:58   #21
spartacus's Avatar
Country: UK - Scotland
Town: Aberdeenshire
Boat name: Sula
Make: Ribcraft 4.8m
Length: 4m +
Engine: Tohatsu 60hp + aux
MMSI: 235087213
Join Date: Jun 2007
Posts: 3,388
Update to this thread. Got an old but mint Mariner 4hp 2-stroke. Started checking it over tonight, cleaned the carb, inline fuel filter, etc. Still to fire it up, but everything looks in good condition.

My only concern, is that I could have probably got away with a standard shaft. The engine is temporarily on the left hand side, although it could sit on the opposite side. Just need to check it doesn't touch the steering arm. I turned the main engine hard lock in both directions and it doesn't make contact.

In the raised position, I suspect it may just clip the water. I haven't tested it yet, it's just an observation. I had the same problem with my last RIB (Zodiac Pro and Tohatsu 3.5hp auxilliary.)

Tried a couple of locations on the boat. Looked at storing it behind the passenger jockey seat (two inline jockey seats), which was my original intention. The skeg would need to sit on the deck, on top of a stainless steel tread-plate. In addition, I suspect the back-rests may not be sufficiently rigid to support a 20kg auxilliary engine. Then I have the added hassle of making a outboard bracket.

The other option is to mount it inside the boat. It would mean removing the crossbar under the clamps and the angle adjustment pin as one of the transom strengthening legs sits slap bang under the engine. This isn't an issue if the engine is facing out (as in the picture.)

It will still need a ratchet strap on it, or it will shake like a box of tools!

Why is everything so much bleed'n hassle?
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