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Old 19 March 2009, 10:12   #11
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twin 30's

I worked a 5.4 searider with twin 30's, and they were elec start, but manual tilt, wasn't a bother, and the boat was excellent with them on. much better than a single 50 on another one,

C.
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Old 19 March 2009, 11:51   #12
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You can not spin in a circle with that relic 85 on the back
There is a small round chap in Sarfhampton who should be able to show you how to spin a small rib with 85 hp on the back.

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Speaking of slow Pete!! Didn't you have a Diesel Pac 22!!
Yep and it did 30 knots which is more than we ever got out of a BWM with twin 40s.

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Have you still got that Crazy Tohatsu with the 150 on the back?


Pete
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Old 19 March 2009, 14:41   #13
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Have you seen this 5.4SR with twin 40s'?
http://www.nationala1marine.co.uk/pr...ider/index.htm
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Old 19 March 2009, 16:40   #14
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Difference being..

I think Rogue Wave was talking about putting the twin 40hps on a 4.7m rather than a 5.4m, we know twin 40's loose about 20% power for twin set up so on a 5.4 you would be running at 64hp on a boat that can take 90, or as some people do 150hp.. whereas 64hp on a boat designed to take 70.. only a small drop in HP.

So would be a good project to see I think.. plus if one engine breaks you can still get back..
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Old 19 March 2009, 18:41   #15
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How about this
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Old 20 March 2009, 05:22   #16
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So would be a good project to see I think.. plus if one engine breaks you can still get back..
So would be a terrible project to see I think...

Afterall a 40 hp mariner weighs about 80 kgs. So two of them would be the equivalent weight of JSPs 115 Yam v4. On the back of a 4.7m Avon

Might be worth launching the boat and have two fat blokes sit on the back as a trial before going ahead and purchasing. Give them a paddle each to represent the top speed you would get with twin 40s too

Heavy steering, lots of easy start on a cold morning to get them going, expensive to run and a top speed of 20 knots hmm or fit a nice 3 cylinder Yam or Tohatsu and have a really good sporty little rib. Now if we just knew of a Tohatsu 90 that could be fettled for a few quid this could be an easy project to complete. Someone might even throw in a white console for the project

Pete
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