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Old 11-07-2011, 03:40 PM   #1
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2 x Mercruiser 5.7 Petrol

Hi, I have two of these 5.7 Mercruisers in my Sea Ray which I would like to replace for lower powered engines as we never use the power. One of the engines is less than a year old (was in it when I bought the boat before you ask)

As I am relatively new does anybody have any suggestions on the most cost effective way of achieving this?

The boat is currently moored in Hampshire.

Many thanks,

Kevin
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Old 11-07-2011, 03:47 PM   #2
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Location: hayling island
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Boat make: extreme 24
Engines: mercruiser 6.2

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dont change them, just use the power you need. smaller engines will work harder and poss use the same amount of fuel,plus the cost of changing everything over,and its better the devil you know .
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Old 12-07-2011, 08:42 AM   #3
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Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's

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Plus it may devalue the resale value of the boat!
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Old 12-07-2011, 09:37 AM   #4
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Country: UK
Location: Southampton
Occupation: Commercial stuff
Interests: boats & beer
Boat name: Just For Kicks
Boat make: Wellcraft 220xl (antique version)
Engines: Mercruiser 5.7
Cruising area: Solent

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let me know if you want to sell one please
John
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Old 12-07-2011, 12:33 PM   #5
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Country: UK
Location: Warwickshire
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Boat name: Lord of the Rings
Boat make: Ring 21C
Engines: Mariner 2.5 200 V6
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Why not LPG it?

http://d2marine.com/services/lpg-conversions/

http://autogasmarine.com/

50% reducton in fuel costs (assuming LPG is available in your area?)

We run a 4.8 V8 for less than a 2.0 diesel!

Jim
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Old 12-07-2011, 03:58 PM   #6
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In a boat? Or a car?
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Old 12-07-2011, 04:30 PM   #7
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Thanks all, lots to think about now... LPG sounds interesting
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Old 20-09-2011, 11:40 AM   #8
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Quote:
Originally Posted by Kevh View Post
Hi, I have two of these 5.7 Mercruisers in my Sea Ray which I would like to replace for lower powered engines as we never use the power. One of the engines is less than a year old (was in it when I bought the boat before you ask)

As I am relatively new does anybody have any suggestions on the most cost effective way of achieving this?

The boat is currently moored in Hampshire.

Many thanks,

Kevin
Did you sell these or are they still available
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