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Old 29 May 2010, 12:34   #1
Country: UK - England
Town: Lowestoft
Boat name: Charlie Golf II
Make: Ribcraft
Length: 4m +
Engine: Outboard Petrol
MMSI: 235075503
Join Date: Sep 2009
Posts: 6
Send a message via MSN to tango charlie 8
50hp and maybe 60hp


i have a 2003 50hp Mariner 2 stroke and its all good, been offered a excellent 2003 60hp mariner and thats all good... would i notice the differnece between them if i replace the 50 with the 60 ??




tango charlie 8 is offline   Reply With Quote
Old 31 May 2010, 06:10   #2
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,650
Not knowing how much ">4m" your boat is, you will notice a difference, just how big a difference will, as usual, depend on a dozen different things.

For what it;s worth, that's a 20% increase in power. I went form a 25 to a 30 on my old SR4 - a similar jump - and although it wasn't spectacularly different, stuff like hole shot was a bit livelier, and I got another 4 knots on my top speed. Made naff all difference at normal cruise.

As you have double the HP there, and assuming your boat is 4-4.5m, you'll get a bigger "step change" than I did.

One thing to check - I assume your transom is rated for at least 60?

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Old 31 May 2010, 06:48   #3
Country: UK - England
Make: Avon Searider
Length: 4m +
Engine: Yamaha 50
Join Date: Jan 2004
Posts: 5,666
A Ribcraft 4.8 (assuming that is what you have) goes well with a Mariner 60. I used to have one with a 60-stroke, and I used to have access to one with a 60 4-stroke. Both went at about the same speed (34 knots if I recall). Since they are both Mariners swapping will be nice and easy - just unplug everything, take one off, put the new one on and plug it all back in again. If it's not going to cost you too much I would give it a go.
Tim M is offline   Reply With Quote

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