Reply
 
Thread Tools Search this Thread
 
Old 03 October 2009, 06:24   #1
Member
 
Country: UK - England
Town: Brigg
Make: Honda
Length: under 3m
Engine: Outboard, petrol, 2
Join Date: Sep 2009
Posts: 8
mercury 4hp 4 stroke??

Hi all, this is my first post as I am new ti SIBing, my 2M Honwave lacks a bit of go with two people in it whilst using my 2hp Honda motor, I was thinking of saving for a new 4hp Mercury/Mariner/Tohatsu. I see in the Mercury brochure that the 5/6hp motors have the same weight and same displacement engine, does anyone have much experience with these outboards (maybe the 4hp will be enough, but can you ever have enough?) and does anyone know what it would involve to up the power of the 4hp to 5 or 6 hp if the engines
are indeed the same. Cheers in advance. Mark.
__________________

__________________
markwade is offline   Reply With Quote
Old 03 October 2009, 06:36   #2
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
Welcome to Ribnet

If you want it to really shift, get the biggest rated HP engine it's rated for-in 2 stroke. A 6hp 2 stroke will cost you less 2nd hand than a new 4hp 4 stroke too.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 03 October 2009, 09:23   #3
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
....and it won't weigh any more.
__________________
Downhilldai is offline   Reply With Quote
Old 04 October 2009, 03:32   #4
Member
 
Country: UK - England
Town: Looe
Make: Delta
Length: 4m +
Engine: Mercury
Join Date: Apr 2004
Posts: 1,335
But dont forget if your wanting to buy a new engine you cant buy a 2 stroke unless your a commercial user
__________________
Turbodiesel is offline   Reply With Quote
Old 05 October 2009, 19:24   #5
Member
 
Country: UK - England
Town: Brigg
Make: Honda
Length: under 3m
Engine: Outboard, petrol, 2
Join Date: Sep 2009
Posts: 8
thanks for the replys, at the mo I'm really not sure what to do, I'll get me thinking cap on during winter and hopefully come up with a P of A. Think the Honda 2hp will possibly fetch maybe 180 on ebay so that could be ploughed into the cost of a 2nd hand 2stroke motor.
__________________
markwade is offline   Reply With Quote
Old 05 October 2009, 19:31   #6
Member
 
chewy's Avatar
 
Country: UK - England
Town: Up Norf
Make: Avon SR4,Tremlett 23
Length: 4m +
Engine: Yam 55, Volvo 200
Join Date: Apr 2007
Posts: 5,217
Whats the max hp it'll take?
__________________
chewy is offline   Reply With Quote
Old 06 October 2009, 07:07   #7
Member
 
Country: UK - England
Town: Brigg
Make: Honda
Length: under 3m
Engine: Outboard, petrol, 2
Join Date: Sep 2009
Posts: 8
the data plate states a 4hp so thats what I'm going for but going back to the original post it does seem that the Merc/Mariner/Tohatsu 4/5/6hp motors could possibly share the same engine and was wondering how easy it it to release a bit more hp from the 4hp.
__________________
markwade is offline   Reply With Quote
Old 06 October 2009, 08:59   #8
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
Merc/Mar/Tohatsu 4 strokes 4,5 & 6 are same block, that is 123 CC, carb restricted, a matter of changing jets for the upper model.

Happy Sibbing
__________________
Locozodiac is offline   Reply With Quote
Old 06 October 2009, 11:49   #9
Member
 
Country: UK - England
Town: Brigg
Make: Honda
Length: under 3m
Engine: Outboard, petrol, 2
Join Date: Sep 2009
Posts: 8
thanks for that Loco I was suspecting something along those lines, I like the idea of running a two stroke but following testing my 2hp 4 stroke honda in a water butt there was nothing to see on the surface of the water, next came my father in laws old evinrude 4hp 2stroke twin, there was quite a bit of oily scum on the surface when we had finished!! in the evinrudes defence I think it was a bit oiled up and would have cleared up with a bit of a run but the difference was still suprising. Still love the sound of the evinrude though.
__________________
markwade is offline   Reply With Quote
Old 06 October 2009, 13:05   #10
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
I didn't realise you were planning to use it in your bath.
__________________

__________________
Downhilldai 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 08:43.


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