Reply
 
Thread Tools Search this Thread
 
Old 17 July 2014, 03:42   #1
Member
 
Country: UK - England
Town: Horley
Make: Yamaha 3.1 STI
Length: 3m +
Engine: 9.8 Tohatsu 2 stroke
Join Date: Sep 2013
Posts: 246
Engine upgrade

Hi all, was on Hoilday a few years ago and was looking at the people having a great time out at sea with(as I know now sibs), and while the wife was not looking I jumped on the web and got a Honwave airdeck and a Honda 2.4hp delivered to my Hoilday house, my wife is not a fan of boating so after receiving a ear bashing about my expesive Hoilday present I have since been pottering around in my little boat, and on the whole happy with the weight v fun trade off, anyway to the question
The Honda 2.4hp as I'm sure you will know is air cooled and has its own little petrol tank, so pretty fool proof, do you think i would get much more speed if I upgraded to a 5hp engine or would the hastle of the extra weight etc not be worth it
Regards
Mick
__________________

__________________
Mickhitchuk is offline   Reply With Quote
Old 17 July 2014, 05:40   #2
Member
 
Landlockedpirate's Avatar
 
Country: UK - England
Town: St Helens
Boat name: Wine Down
Make: Maxum
Length: 8m +
Engine: Inboard
Join Date: Apr 2012
Posts: 934
A jump to a 5hp will make a massive difference to the performance of your sib, mainly because it will plane with just you on board.

I would guess your current max speed at WOT is around 4-5mph, with a 5hp the boat will get on the plane and reach the heady speeds of 10 or 11mph, trust me that will feel fast after your 2.3.

If you are going for a new 4 stroke engine I would go for the maximum your dinghy can take, 6hp. The cost difference is neglible and the extra power may even allow you to plane with 2 on board. The other reason to go for the 6 is that it will be the same weight as the 5hp anyway, so might as well have the extra grunt (Suzuki is just 25kg)

But if you are looking for a used engine, try and find a clean 2 stroke, they are not cheap but are well worth it. With a 2 stroke you would might be better sticking to a 5hp (If weight is really important) since all the 6hp I can think of are twin cylinder and although smoother weigh a lot more (5hp Yamaha=19kg, 6hp Yamaha = 27kg).
__________________

__________________
Landlockedpirate is offline   Reply With Quote
Old 17 July 2014, 06:46   #3
Member
 
Country: UK - England
Town: Horley
Make: Yamaha 3.1 STI
Length: 3m +
Engine: 9.8 Tohatsu 2 stroke
Join Date: Sep 2013
Posts: 246
Thanks for the great advice, looks like its time for an upgrade then, I'll have a look at the 2v4 stroke options, at this rate of upgrade I'll be on a 75hp dream machine by the time I'm 70
__________________
Mickhitchuk is offline   Reply With Quote
Old 17 July 2014, 10:27   #4
Member
 
Country: Other
Town: Lisbon
Make: Suzumar
Length: 3m +
Join Date: May 2014
Posts: 142
Take a good look to see if there are any 2 stroke restrictions where you usually take your boat. I had to go for a 4 stroke since 2 strokes are not allowed in dams in my country.

BTW, what Honwave do you have and how many hp can it take?
__________________
Amukinado is offline   Reply With Quote
Old 17 July 2014, 10:47   #5
Member
 
Country: UK - England
Town: Horley
Make: Yamaha 3.1 STI
Length: 3m +
Engine: 9.8 Tohatsu 2 stroke
Join Date: Sep 2013
Posts: 246
Hi, thanks for the advise, I have the 2.4 honwave air deck with a 5hp limit, it's not my ideal set up, it was just a quick Hoilday purchase, I was going to upgrade the motor a big for the rest of this year then see about a new toy next year
__________________
Mickhitchuk is offline   Reply With Quote
Old 17 July 2014, 11:36   #6
Member
 
Landlockedpirate's Avatar
 
Country: UK - England
Town: St Helens
Boat name: Wine Down
Make: Maxum
Length: 8m +
Engine: Inboard
Join Date: Apr 2012
Posts: 934
No restrictions in the UK, all waterways that allow engines allow 2 strokes.

If you are going to upgrade the sib next year anyway, you might as well upgrade the whole lot. Stick the Honwave and engine on Ebay and boats and outboards, if you price it right it will sell within a week. Then buy a whole new or new to you package, simples. It doesnt need to cost as much as you think, and upgrading in a single shot is always cheaper than upgrading bit by bit.
__________________
Landlockedpirate is offline   Reply With Quote
Old 17 July 2014, 15:57   #7
Member
 
Locozodiac's Avatar
 
Country: Other
Town: Lima-Peru
Boat name: Nautile
Make: Sea Rider Boats
Length: 4m +
Engine: Tohatsu 18 /30 HP
Join Date: Sep 2007
Posts: 1,706
A 2.4 Mt sib is a pool toy in size, don't know your current weight, but will have my doubts if a 5 HP will plane that size sib with you along, too much hull drag to overcome fast.

Most likely will achieve just fast displacement non planing speeds. Sell that combo right away and buy a larger 3.20 and up sib with an engine you feel comfy in carrying.

Happy Boating
__________________
Locozodiac is offline   Reply With Quote
Old 17 July 2014, 16:03   #8
Member
 
Country: UK - England
Make: Quicksilver
Length: 3m +
Engine: Suzuki 4hp
Join Date: Jun 2014
Posts: 22
For what it's worth- I'm only a novice but I can say that my 4hp four stroke (Suzuki) planes well solo. In fact it flies along especially if I lean well forward. With wife/picnic/spare fuel added it still just about planes in flat water. Rough water and a headwind makes it slow, wet and unpleasant.

I know it's not that far, but we went from Baiter Park, over to Studland, then around Brownsea recently and seem to have used only about 3 litres or less of fuel.

As far as I can tell, small boat engines are a bit like the bike engines I knew in the 70's- Two stokes = Noisy, Smokey, revvey and thirsty but fun. Four strokes are quieter, more refined, heavier but more frugal.
__________________
Transporterman99 is offline   Reply With Quote
Old 17 July 2014, 16:13   #9
Member
 
Locozodiac's Avatar
 
Country: Other
Town: Lima-Peru
Boat name: Nautile
Make: Sea Rider Boats
Length: 4m +
Engine: Tohatsu 18 /30 HP
Join Date: Sep 2007
Posts: 1,706
Yep but accorrding to your avatar you have a 3 + Mt sib which is more easier to plane as has less hull drag as opposed to a shorter 2.40 Mt.

Happy Boating
__________________
Locozodiac is offline   Reply With Quote
Old 17 July 2014, 16:26   #10
Member
 
Landlockedpirate's Avatar
 
Country: UK - England
Town: St Helens
Boat name: Wine Down
Make: Maxum
Length: 8m +
Engine: Inboard
Join Date: Apr 2012
Posts: 934
I know that a Honwave 2.4 will plane with a 4hp 2 stroke and a 'chunky' helm on board It was easier with a tiller extension and I mainly sat on the seat, rather than the tubes.
__________________

__________________
Landlockedpirate is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 00:36.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.