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Old 25 July 2016, 09:18   #1
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Engine size and max transom weight

Hi all. As per my other post, I ordered a Honwave T40 with a Suzuki 20hp. Dealer called today to say there is a 4 week wait for the 20hp. He has offered a 25hp at just 50 quid more. Normally I'd be very happy with the jump in power... however, the 25hp weighs in at 66kg dry weight and the Honwave transom is rated at 70kg/30hp.

Would the heavier engine be putting too much hassle stress on the transom, or am I being over cautious as the weight and power are both inside manufacturers specs?!
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Old 25 July 2016, 09:21   #2
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It doesn't exceed the stated Weight or HP of the boat, what's the problem ?
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Old 25 July 2016, 09:22   #3
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It doesn't exceed the stated Weight or HP of the boat, what's the problem ?
Probably me just being a pussy as the engine weight is close to the max weight
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Old 25 July 2016, 09:25   #4
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Are you buying an Aux as you will need to factor that in?

Also, are you leaving this built as that is a heavy engine to take on and off all the time if that bothers you?
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Old 25 July 2016, 09:29   #5
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Are you buying an Aux as you will need to factor that in?

Also, are you leaving this built as that is a heavy engine to take on and off all the time if that bothers you?
I have a Yam Malta as an Aux, but would probably keep that on deck. Keeping it built and on the trailer at all times
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Old 25 July 2016, 09:32   #6
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25% more power for 50.
If it was me it would be ordered already, no fannying about at all !!!
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Old 25 July 2016, 09:39   #7
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Ash that's an amazing offer as that 25hp is a 3cyl (as opposed to the 20hp 2cyl) with 50% greater engine capacity (which should be 500 more) so loads of grunt and smoother. However you do have to consider the extra weight and something else to think of... the 20hp is proving very popular** now in smallcraft circles due to its 44kg and may be an easier seller when you swap, upgrade or whatever.

Another thought... if there was any possibility you wanted to move to a smaller SIB or an air floor you carried in the car then the 20 would still be ideal... but the 25 would need swapping.

I don't have an instant idea what I'd do in your position.

** Hence your dealer's wait for one... when I had mine serviced last week they commented the same.
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Old 25 July 2016, 10:32   #8
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Engine size and max transom weight

Quote:
Originally Posted by ashwatkins View Post
Would the heavier engine be putting too much hassle stress on the transom, or am I being over cautious as the weight and power are both inside manufacturers specs?!

At 62kg the short shaft manual start DF25 is well within the transom weight and Honwaves have the meatiest transoms of any sibs.
As your trailering, and accept it's a two man lift if you ever need to remove the engine I'd go with the 25 at that price. The Honwave and 25 will be a great combination and being 3 cylinder it will be much smoother than the 20.....l've had a 20 for three years, been great so far and my only criticism is they do vibrate slightly more than you would expect.
The 25 short shaft might be slightly harder to sell in the future as it's getting at the top end of the portable engine weight.
Jeff of this parish has one and am sure he'll be along to sing its praises.
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Old 25 July 2016, 10:41   #9
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I would ask price for 30, probably same weight. May as well go the whole hog if cheap enough option.
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Old 25 July 2016, 10:48   #10
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I would ask price for 30, probably same weight. May as well go the whole hog if cheap enough option.

Good thinking, but as far as I'm aware the 30 is only available, in the UK at least, with electric start, ptt and weighs in at 72kg. Also much more expensive.
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