Reply
 
Thread Tools Search this Thread
 
Old 20 April 2019, 06:22   #1
Member
 
Country: UK - England
Town: Ipswich
Boat name: Click and Collect
Make: Valiant and Narwhal
Length: 4m +
Engine: Outboard
Join Date: Sep 2016
Posts: 1,107
Possible Engine Upgrade

Now I have bought the trailer for my local use of the Honwave T38IE I am thinking of an engine upgrade to a Mariner 20 hp 4 stroke. I currently have a mercury 15 HP 2 stroke and a Tohatsu 10 hp 2 Stroke for local trips and was wondering what the benefite of the 20 4 stroke might bring. Remember this would be for trailering so not concerned about the weight of getting it on and off

I had my first blast out today with the 15 hp Mercury 2 Stroke with 2 people and the T38IE got on the plane very quickly and I got 17 Knots with the tide and 14 knots against the tide. I could cruise very nicely at about 12 Knots. I used 8.5 ltrs of petrol for a 18 mile trip.


I was wondering how others feel these figures would improve if I did buy the 20 hp 4 stroke


Thanks
__________________
Bigplumbs is offline   Reply With Quote
Old 20 April 2019, 10:02   #2
Member
 
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Excel 435
Length: 4m +
Engine: Suzuki Outboard/25/4
Join Date: Oct 2011
Posts: 7,441
RIBase
By my reckoning you'll get about 20% better fuel consumption and wot I find you get 2-3 knots more at top end per 5 hp now before anyone jumps in there's lots of factors that affect the figures but I've done a lot with my 25 and it seams that's about the norm of course you can play with props to get better performance to suit you boating
__________________
jeffstevens763@g is offline   Reply With Quote
Old 20 April 2019, 10:48   #3
Member
 
Country: UK - England
Town: Ipswich
Boat name: Click and Collect
Make: Valiant and Narwhal
Length: 4m +
Engine: Outboard
Join Date: Sep 2016
Posts: 1,107
Here is a short video with the 15hp 2 stroke with my mate at the helm. I am in the Drone... No idea if he was WOT though

https://youtu.be/M2gNEBAyQRA
__________________
Bigplumbs is offline   Reply With Quote
Old 20 April 2019, 10:58   #4
RIBnet Supporter
 
willk's Avatar
 
Country: Ireland
Length: 4m +
Join Date: Feb 2008
Posts: 14,664
20hp sounds good and simple with the new trailer.

When you add the final "attachment" of a hard hull, your foray into the world of lightweight boating will be complete!

__________________
I'm sorry, but there IS no Mars Bar.
willk is offline   Reply With Quote
Old 20 April 2019, 11:45   #5
Member
 
Country: UK - England
Town: Ipswich
Boat name: Click and Collect
Make: Valiant and Narwhal
Length: 4m +
Engine: Outboard
Join Date: Sep 2016
Posts: 1,107
Got 6 with hard hulls this is a different machine sort of a moped
__________________
Bigplumbs is offline   Reply With Quote
Old 20 April 2019, 19:48   #6
Member
 
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Excel 435
Length: 4m +
Engine: Suzuki Outboard/25/4
Join Date: Oct 2011
Posts: 7,441
RIBase
The bottom line IMO is stick with what you have you have a good turn of speed with and against current and crusing two up, you have other boats that fill the gaps this set up is a bit like gurnard's guppy it suits the quick no hassle get on the water set up and should be used in that way
__________________
jeffstevens763@g is offline   Reply With Quote
Reply

Tags
sib

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 07:02.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.