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Old 04 May 2016, 03:30   #11
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Country: UK - England
Town: Cambridge
Boat name: SIBylle
Make: Honda Honwave
Length: 3m +
Engine: Honda BF20
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I've not really had time or people to experiment yet, but max load so far has been 2 adults at roughly 75kg each, 3 kids at roughly 25-30kg each, 10 litres fuel, large picnic, etc. Briefly peaked at 18 knots but we didn't actually cruise at WOT so no idea what actual top speed would have been with that load.

The Honwave T38 + 20HP Honda planed with ease, to be honest I didn't really notice much difference over being out with half that load, so I would expect it to plane with 4-5 adults... But I have not tried so I could be wrong.
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Old 04 February 2017, 07:02   #12
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Country: UK - Scotland
Town: Bishopton, Renfrewshire
Make: Excel SD365
Length: 4m +
Engine: 20hp Mariner
Join Date: Jan 2017
Posts: 41
Just bought my first set up: Excel 365 and a Mercury 20 4 stroke.

Few questions:
I'm wondering if the engine is too big (50kg). Very heavy to lift on and off and I get the feeling from posts on here that a 10 would do the job.
I'm trailing the whole thing but a bit worried the weight of the engine bobbing about in the back might damage the transom.

Just wondering what you guys thought?

Nick
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Old 04 February 2017, 07:05   #13
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Country: UK - Scotland
Town: Bishopton, Renfrewshire
Make: Excel SD365
Length: 4m +
Engine: 20hp Mariner
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Posts: 41
Just bought my first set up: Excel 365 and a Mercury 20 4 stroke.

Few questions:
I'm wondering if the engine is too big (50kg). Very heavy to lift on and off and I get the feeling from posts on here that a 10 would do the job.
I'm trailing the whole thing but a bit worried the weight of the engine bobbing about in the back might damage the transom.

Just wondering what you guys thought?

Nick
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Old 04 February 2017, 12:08   #14
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Country: UK - England
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Boat name: Nimrod II
Make: Aerotec 380
Length: 3m +
Engine: Suzuki DF20 EFI
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A 20hp on a 365 or thereabouts of most makes is a suitable combination (I'm assuming your 365 is rated to a 20?) and on the water the engine will be supported on the transom fine. Different folks have different ideas about trailing SIBs with 50kg engines though. I'm not keen unless the transom and outboard skeg are both well supported.

A 10hp doing the job? What use I wonder? With a 10 it may be just acceptable with 1/2 folks but 15min or 20 is far far better to give you leeway for greater loads and difficult sea conditions. There is nothing worse than a SIB that will not... or only just... plane.
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Old 04 February 2017, 12:22   #15
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Country: UK - Scotland
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Thanks Fenlander.

The boat's rated to 20 so that's all fine.

As to support... Transom savers seem to be all the rage in the USA but non existent over here (which given our roads compared to theirs is a bit crazy!).

Worth shelling out the thick end of 100 on one?

N
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Old 04 February 2017, 12:40   #16
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Country: UK - England
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Have a look on search for threads like this...

trailering SIB with heavy engine

I have only trailed grp smallcraft with 20hp+ and always made sure the trailer would allow the outboard to be down in the running position as far as possible with a strap to prevent bouncing.
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Old 04 February 2017, 14:03   #17
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Country: UK - England
Make: XS500
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Getting your SIB planing

Good advice from Fenlander as always.
Difficult question to answer as all depends what you want from your sib. In terms of boat size your 20hp Merc. is perfect, as max hp and within transom weight for boat. Will plane easily 3 up and pull teenager on toys/kneeboard 1 or 2 up. If none of that interests you then a 10hp with 1 or 2 up will also be fine and get you on the plane. Me, I would always put the max. hp the boat is rated for, as long as I could manhandle the motor on/off the transom.
As for trailering that's a different story. All depends on distance. Need to ensure transom is well supported on trailer and motor wedged/supported/strapped to trailer if travelling any distance.
Aside from trailering issues, and your ok with manhandling a 50kg outboard, I would say you have the perfect motor for your 3.65m sib. Enjoy.

PS Please don't take this the wrong way but, if you are trailering, why have a sib?
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Old 04 February 2017, 14:09   #18
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Country: UK - England
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Boat name: Spy-sea-one
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Ive just trail my sib with wide bunks and a keel bunk or pad I set my engine at shallow draft with a block of HDPE plastic between the leg and bracket to take the load instead of the mechanism I would have it fully lowered down if there were enough clearance I've towed like this for years and for miles never had any problem but the engine always has a ratchet strap around it to prevent any movement.
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Old 04 February 2017, 14:31   #19
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Quote:
Originally Posted by jeffstevens763@g View Post
Ive just trail my sib with wide bunks and a keel bunk or pad I set my engine at shallow draft with a block of HDPE plastic between the leg and bracket to take the load instead of the mechanism I would have it fully lowered down if there were enough clearance I've towed like this for years and for miles never had any problem but the engine always has a ratchet strap around it to prevent any movement.


This is how I towed a Bombard Aerotec and a Zodiac Classic, both with 25HP Yam 2 strokes on and never had any issues at all.
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Old 04 February 2017, 21:20   #20
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Country: UK - Scotland
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Make: DSB Zephyr
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Hi
I have a DSB Zephyr 4mtr with a yamaha 40hp twin two stroke, it goes out with two my partner Dawn my self and anyone else that fancys (up to two ) a spot of fish or just for the jolly planning and speed is there but just potting along and having a nice day is good
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