Chris 249 said..
To throw something else into the mix, both inboard flush-deckers and Cruising Tens won the Adams Ten nats in the early years, but the standard Cruising Tens with inboards don't seem to go anywhere near that well as far as I have seen; in fact a couple of them have been remarkably slow. Perhaps the Adams Ten can handle the weight of either the inboard or the cabin, but not both?
Why not contact Graham Radford from the Adams office (who is still easy to find, I think) who had an inboard in Waggers II when he did the Hobart, and then pulled it out? Perhaps you could also find Paul Kelly, the original builder, who had the inboard C10 Zig Zag? They may give you some interesting info. Alternatively Phil from Deck Hardware knows Tens and is easy to track down.
Personally I replaced my 28'ers diesel with a Tohatsu 9.8 outboard and in a boat similar in weight and drag to the Adams, I never ran out of grunt. I haven't heard the FT10 guys really complain about the Tohatsu 9.8 they use, and some of them do a lot of offshore work. With the ultra long shaft, cavitation is very rare, probably because you have the power and prop to get the boat moving fast enough that the stern wave is providing further immersion for the prop. I've come in from offshore in swell and very heavy chop with as much ease under the outboard as under the diesel.
Hi Chris,
i owned my Adams 10 for about 11 years. It was in full cat2 trim which I raced very successfully on Moreton Bay and did 9 Brisbane to Gladstone races. Yes the cruising version is slower than the flush decker with and outboard, but we are not comparing apples for apples. The flush decker is no more than an open day sailer (early sports boat) and the cruising version is a boat fitted so you can do some small cruising which is obviously heavier. The weight of the diesel is only 1 person plus the drag of the leg which would slow the boat more than the weight of the diesel. The cruising Adams 10 is still competitive in any fleet considering it age.
As for using an outboard, I can tell you from experience 9.8hp may be fine in calm water eg. Sydney Harbour or Pitwater or a nice long rolling swell, but in Moreton Bay with 25 knots and a 1.5m chop it is totally useless. Just ask the blokes with their sports boats. It all depends on what he wants to do with the boat. The bloke that now owns my old 10 has just done a full refurbish and it looks a total picture and still goes well.