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Old 21 August 2011, 18:11   #1
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10hp-15hp is it possible?

Hi, I have a zodiac cadet 310s with a mariner 10hp on the back and it is bledy quick. Can get on the plane with 3 adults too. It's rated for a 15, and this got me thinking, I love the engine I have now, is there anyway of tuning it to make 15hp(surely a lighter version than a stock 15??)
The engine is a mariner 10hp late model 2stroke 100:1 ratio.
Believed to be a 2004 ish engine.
Grateful of any help, cheers
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Old 23 August 2011, 13:56   #2
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Intrested in this aswell,wonder if a 10hp Mercury can bw upped to a 15hp?
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Old 23 August 2011, 14:08   #3
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Short answer is Yes!!!

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Old 24 August 2011, 17:48   #4
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Short answer is Yes!!!

Peter @ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007
Cheers peter ,would it cost an arm and a leg to do? and would the prop size have to be changed?
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Old 24 August 2011, 17:50   #5
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No & No not usually but you can play with the Prop too if needed

Not sure on exact requirements for that model but it can be done

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Old 25 August 2011, 02:54   #6
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yes

Quote:
Originally Posted by arvey85 View Post
Hi, I have a zodiac cadet 310s with a mariner 10hp on the back and it is bledy quick. Can get on the plane with 3 adults too. It's rated for a 15, and this got me thinking, I love the engine I have now, is there anyway of tuning it to make 15hp(surely a lighter version than a stock 15??)
The engine is a mariner 10hp late model 2stroke 100:1 ratio.
Believed to be a 2004 ish engine.
Grateful of any help, cheers
yes and if you get access to a parts list from Mariner that as I know was built by Yamaha and compare parts like crankshaft, carburator, reed valves inbetwin 10hp and 15hp if only carburator and reefvalves difer this is what you have toreplece to make it .
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Old 25 August 2011, 03:10   #7
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yes and if you get access to a parts list from Mariner that as I know was built by Yamaha and compare parts like crankshaft, carburator, reed valves inbetwin 10hp and 15hp if only carburator and reefvalves difer this is what you have toreplece to make it .
This is the Merc build motor in Belgium it was not made by Yamaha in Japan.

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Old 25 August 2011, 08:06   #8
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This is the Merc build motor in Belgium it was not made by Yamaha in Japan.

Peter @ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007
Yes you may be wright and the Jaguar you've been driving is made in the Filipines not in the USA by Ford or you drive a Bentley that is made I can be sure not by Wolsksvagen.
Get real
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Old 25 August 2011, 08:40   #9
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Quote:
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yes and if you get access to a parts list from Mariner that as I know was built by Yamaha .....
Quote:
Originally Posted by papapaul View Post
Yes you may be wright and the Jaguar you've been driving is made in the Filipines not in the USA by Ford or you drive a Bentley that is made I can be sure not by Wolsksvagen.
Get real
2004 Mariner 10hp motors are Mercury, not Yamaha.
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Old 25 August 2011, 09:29   #10
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Quote:
Originally Posted by Downhilldai

2004 Mariner 10hp motors are Mercury, not Yamaha.
That's what I tried pointing out...get ur tin hat ready!

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