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Old 20 April 2019, 01:22   #1
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Country: UK - England
Town: Ipswich
Boat name: Click and Collect
Make: Valiant and Narwhal
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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
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Old 20 April 2019, 05:02   #2
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Country: UK - England
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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
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Old 20 April 2019, 05:48   #3
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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
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Old 20 April 2019, 05:58   #4
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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!

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Old 20 April 2019, 06:45   #5
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Country: UK - England
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Boat name: Click and Collect
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Length: 4m +
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Got 6 with hard hulls this is a different machine sort of a moped
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Old 20 April 2019, 14:48   #6
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Country: UK - England
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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
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