Reply
 
Thread Tools Search this Thread
 
Old 20 June 2022, 06:59   #1
Member
 
Country: UK - Wales
Town: Swansea
Boat name: Black mag
Make: Boat world
Length: 3m +
Engine: 5hp 4 stroke
Join Date: Jun 2022
Posts: 16
5hp to a 15hp

Hi guys new to this and was hoping someone could help 😃. Just got a 3.3m sib with a 5hp 4 stroke mercury On the back. I was hoping to get a 15hp for it as itís the biggest recommended engine for the boat and was hoping someone could point me in the right direction to the lightest one available or something which would perform just as well. Used for fishing but need the power to get around the coast in the tides etc. thanks very much 🤌🏽
__________________

__________________
Jenks87 is offline   Reply With Quote
Old 20 June 2022, 07:19   #2
Member
 
A1an's Avatar
 
Country: UK - Scotland
Town: Fort William
Make: Humber Destroyer
Length: 5m +
Engine: Yamaha F80
Join Date: Mar 2012
Posts: 2,649
RIBase
Personally I’d opt for a two stroke if you are going to 15hp, a 15hp 4 stroke is a lump of a thing.
__________________

__________________
There is a place on this planet for all of Gods creatures.........right next to my tatties and gravy.
A1an is offline   Reply With Quote
Old 20 June 2022, 07:24   #3
Member
 
chipko's Avatar
 
Country: UK - England
Town: Up North and right a bit
Make: XS500/Merc340/Bic245
Length: 5m +
Engine: Mar 60/20/3.5/Hon2.3
Join Date: Sep 2013
Posts: 764
Hi,
If going new or nearly new the current crop of 15 hp four strokes from the big six manufacturers tip the scales at;

Tohatsu 43kg
Suzuki 44kg
Honda 46kg
Mercury/Mariner 47kg
Yamaha 51kg


If looking at pre 2006 two strokes then Merc/Mariner/Yamaha around 36 to 38kg
__________________
chipko is offline   Reply With Quote
Old 20 June 2022, 09:33   #4
Member
 
Country: UK - Wales
Town: Swansea
Boat name: Black mag
Make: Boat world
Length: 3m +
Engine: 5hp 4 stroke
Join Date: Jun 2022
Posts: 16
Quote:
Originally Posted by A1an View Post
Personally Iíd opt for a two stroke if you are going to 15hp, a 15hp 4 stroke is a lump of a thing.
Yes thatís what I was hoping to do, lightest I found was a 2 stroke Yamaha at 37kg which I was hoping would be manageable enough for me to launch with boat on my own. Donít want to get an engine adding to much weight and end up struggling alone 🙈
__________________
Jenks87 is offline   Reply With Quote
Old 20 June 2022, 09:35   #5
Member
 
Country: UK - Wales
Town: Swansea
Boat name: Black mag
Make: Boat world
Length: 3m +
Engine: 5hp 4 stroke
Join Date: Jun 2022
Posts: 16
Quote:
Originally Posted by chipko View Post
Hi,
If going new or nearly new the current crop of 15 hp four strokes from the big six manufacturers tip the scales at;

Tohatsu 43kg
Suzuki 44kg
Honda 46kg
Mercury/Mariner 47kg
Yamaha 51kg


If looking at pre 2006 two strokes then Merc/Mariner/Yamaha around 36 to 38kg
Yea defo guna look at a 2 stroke to reduce the weight, hard to find second hand so may have to opt for a newer one 🤔
__________________
Jenks87 is offline   Reply With Quote
Old 20 June 2022, 09:45   #6
Member
 
Country: UK - Wales
Town: Swansea
Boat name: Black mag
Make: Boat world
Length: 3m +
Engine: 5hp 4 stroke
Join Date: Jun 2022
Posts: 16
Also, are new 2 strokes only sold as commercial now meaning I would have to find a second hand one? New to this so all info much appreciated ����
__________________
Jenks87 is offline   Reply With Quote
Old 20 June 2022, 20:34   #7
Member
 
A1an's Avatar
 
Country: UK - Scotland
Town: Fort William
Make: Humber Destroyer
Length: 5m +
Engine: Yamaha F80
Join Date: Mar 2012
Posts: 2,649
RIBase
You’ll struggle to find a dealer that will sell you a two stroke, they can still be found on the various forums/free ads but you’ll pay through the nose for them. There was a nice Yamaha 9.9 for sale recently and I think these can be modified to 15hp pretty easily. I’ve not personally done one so wouldn’t like to comment further.
__________________
There is a place on this planet for all of Gods creatures.........right next to my tatties and gravy.
A1an is offline   Reply With Quote
Old 20 June 2022, 21:32   #8
Member
 
Country: UK - Wales
Town: Swansea
Boat name: Black mag
Make: Boat world
Length: 3m +
Engine: 5hp 4 stroke
Join Date: Jun 2022
Posts: 16
Quote:
Originally Posted by A1an View Post
Youíll struggle to find a dealer that will sell you a two stroke, they can still be found on the various forums/free ads but youíll pay through the nose for them. There was a nice Yamaha 9.9 for sale recently and I think these can be modified to 15hp pretty easily. Iíve not personally done one so wouldnít like to comment further.
Yes looking more into it now that might be the better option as seam to be a lot more of those engines about, will keep on the hunt and hope something pops up. Thanks for the info 👌🏼
__________________
Jenks87 is offline   Reply With Quote
Old 27 June 2022, 21:57   #9
Member
 
Country: UK - Wales
Town: Swansea
Boat name: Black mag
Make: Boat world
Length: 3m +
Engine: 5hp 4 stroke
Join Date: Jun 2022
Posts: 16
1996 mariner 9.9hp 2 strokw

Ok so just purchased an immaculate 1996 mariner 9.9hp 2 stroke, should be plenty of power for two of us and fishing gear but is this one of engines you can upgrade the carb on into a 15hp just incase want to get that little bit more? Engine coming in next couple of days 🤪 should notice a big difference from the 5hp 4 stroke. Cheers guys
__________________
Jenks87 is offline   Reply With Quote
Old 28 June 2022, 14:13   #10
Member
 
Country: UK - England
Town: East Anglia
Boat name: Nimrod II
Make: Aerotec 380
Length: 3m +
Engine: Tohatsu 9.8 2-stroke
Join Date: Nov 2007
Posts: 7,466
Carb much larger bore so if you can find a decent used one... or perhaps a bargain Chinese new one... you will be well on the way to the upgrade. At the moment I forget if anything else re timing etc needs changing. I might even have known it in a past life and forgotten. If someone finds I've posted re this in the past please link it and show just how leaky my memory has become!

For now here are the two carbs in comparison when I owned both size motors at the same time.
Attached Thumbnails
Click image for larger version

Name:	Mercury 10 carb.jpg
Views:	5
Size:	93.3 KB
ID:	140994   Click image for larger version

Name:	Mercury 15 carb throat.jpg
Views:	5
Size:	82.8 KB
ID:	140995  
__________________
Fenlander is offline   Reply With Quote
Old 28 June 2022, 14:17   #11
Member
 
Country: UK - Wales
Town: Swansea
Boat name: Black mag
Make: Boat world
Length: 3m +
Engine: 5hp 4 stroke
Join Date: Jun 2022
Posts: 16
Quote:
Originally Posted by Fenlander View Post
Carb much larger bore so if you can find a decent used one... or perhaps a bargain Chinese new one... you will be well on the way to the upgrade. At the moment I forget if anything else re timing etc needs changing. I might even have known it in a past life and forgotten. If someone finds I've posted re this in the past please link it and show just how leaky my memory has become!
no worries, havnt got engine in water yet so hopefully wont need to upgrade but if do will have a good search. cheers for the info and will defo look it up if needed
__________________

__________________
Jenks87 is offline   Reply With Quote
Reply

« Fribs folding ribs | Top | - »
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




All times are GMT. The time now is 12:03.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.