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Old 27 October 2015, 09:20   #1
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Question about 10 hp Mariner O/B

I have read numerous times of 10 - 15 hp power upgrades. I am now wondering whether it can be done to mine, and if any of you good people in the know, can tell me what is required to do said upgrade...!

My outboard is a 2004, 10hp 2/ Mariner. The thermostat version.

I have tried google, but it has not given me any answers whatsoever.
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Old 27 October 2015, 10:04   #2
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I've had the 10 & 15 at the same time to compare... new carb required for sure as the throat is far bigger on the 15... not a restrictor you can remove either... the whole body is cast in one.

I can't quite remember but you might need to check on a parts diagram for them both to see if the reeds that are directly behind the carb might be smaller on the 10.
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Old 27 October 2015, 13:34   #3
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legend has it that its just a carb swap !.

Get the serial number off the ID plate and ring your local mariner dealer, they should be able to confirm and price parts for you.
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Old 27 October 2015, 13:54   #4
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There are some pics of my two here... Mercury 10hp upgrade to 15hp.

You can see it's a fair reduction in throat area.

I've just looked at the parts diagrams on Boats.net for a 10 & 15 (just one example as you'd have to do it with your own serial number) and the reed block is the same for 10 & 15hp.
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Old 27 October 2015, 15:15   #5
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Thank you for the info guys..!

I see what you mean about the throat clearance.

Worrying thing is, I followed your advice, and looked on boats.net, and my serial number is not found..!
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Old 27 October 2015, 15:27   #6
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If you didn't mind posting it (or PM me) and I'll try to look the parts up for you.
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Old 27 October 2015, 15:32   #7
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I dont mind mate, it would be very kind if you could, thank you.

The details are -

S.N 0P290173
10M
2004
Made in Belgium
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Old 27 October 2015, 16:39   #8
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Is this yours? Serial no. range looks correct??

10 MAGNUM 0P017000 THRU 0P325499 Mariner Outboard Parts
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Old 27 October 2015, 17:22   #9
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I presume so bud, but not sure. I got that aswell, but if you type in the serial number, it is not recognised. Also, is the 10M a 'Marathon' or a 'Magnum' version?
The only thing that I could think of, that site is for the USA, and on the top of my engine, it says something along the lines of, 'not for use or sale in usa'.....!?!?

I think the best thing to do, is to go and see the local 'Mariner dealer', and then I could get a rough idea of price aswell, and gauge whether it is financially viable to upgrade, or cheaper to just buy a bigger engine....

Many thanks for your time and effort mate, it is appreciated, I will update and let you know, if and when I get answers.

Dave
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Old 28 October 2015, 03:21   #10
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Try this one then...

Mariner Outboard Motor Parts by Engine Model

Whichever of Magnum/Marathon you choose it has your serial number range with "Bel" in brackets rather than USA... I reckon they are correct part listings.

Input your serial no. in the box and this website seems to find yours...

http://www.marineengine.com/parts/mariner-outboard/

I think you will find there is a marking on the carb that will ID it.
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