Engine size and max transom weight

[ashwatkins]

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?!

[steco1958]

It doesn't exceed the stated Weight or HP of the boat, what's the problem ?

[ashwatkins]

Originally Posted by steco1958

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

[Xk59D]

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?

[ashwatkins]

Originally Posted by Xk59D

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

[69cmw]

25% more power for £50.
If it was me it would be ordered already, no fannying about at all !!!

[Fenlander]

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.

[chipko]

Originally Posted by ashwatkins

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.

[Xk59D]

I would ask price for 30, probably same weight. May as well go the whole hog if cheap enough option.

[chipko]

Originally Posted by Xk59D

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.

[kevinsc]

Hi all
I am in the almost the same situation with the outboard. I have 3.8m hydro force and use a 5hp outboard and when in the forth of forth the waves will over take you because the engine is not man enough for the job looking at getting a 25hp but do I get a 2stroke or a 4stroke, there a few 2strokes around at good prices or should I spend a bit get a 4stroke not sure what's better it's my 1st sub
Cheers

[jeffstevens763@g]

I have the 25 great engine rip his arm off mate 3 cylinder engine loads of power very economical if it stopping on the boat no probs lifting go for it you know you should

Cheers

[Xk59D]

Originally Posted by chipko

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.

ah well, makes it an easy choice then

[kevinsc]

Originally Posted by jeffstevens763@g

I have the 25 great engine rip his arm off mate 3 cylinder engine loads of power very economical if it stopping on the boat no probs lifting go for it you know you should

Cheers

Is it a 2stroke jeff

[jeffstevens763@g]

Originally Posted by kevinsc

Is it a 2stroke jeff

mines a 4 stroke Kevin but the 2 stroke are good two if you can get hold of one they did use to suffer from corrosion a bit in the old days but have no probs now but mechanically sound engines

[kevinsc]

I think Jeff I will go with a 4stroke as the are a bit quieter and less hassle as you don't have to mix the fuel

[jeffstevens763@g]

Yep a lot less hassle mine sounds fantastic when she revs up quick and responsive good on fuel getting 22 knots flat calm seen 24 knots but wind/tide helped Mercury 365 the old 380 with shorter cones one up 50l of fuel and kit quite a lot to be honest.
Hope you get the good deal cheers

[kevinsc]

Keeping my eye on eBay gumtree to see what comes up. Roughly how long to you get with a 50ltr fuel tank

[jeffstevens763@g]

It's hard to say as I plod around a lot I like to get close in and explore all the nooks and crannies but 25 lts lasted me all week if you look at fenlanders thread on his 20 will give a good idea.

Cheers

[kevinsc]

I have only a 25ltr tank but should give me a good day out at loch lomond