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Old 06 January 2012, 13:23   #1
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Outboard Service

I want to service my mercury 9.9 hp 2 stroke but I am new to this and want to be able to do this myself.
Any one with any advice with where to start? OB Haynes manual or something.

Thanks.
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Old 06 January 2012, 15:43   #2
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Originally Posted by lockieboi View Post
Any one with any advice with where to start?
Good to see someone wanting to get their hands dirty!

You'll need to determine the exact age of your outboard and model so you can get the right service manual. I find a hard-copy manual easier to follow, than PDF downloads or CDs, as invariably you need to check diagrams and will end up printing the damn thing anyway!

This list is not exhaustive - but on most 2-strokes engines you'll need to perform period servicing on the following parts:

Replace impeller (waterpump gaskets, etc, if required)
Check and replace spark plugs
Renew starter rope (if manual pull)
Check electrics, connections
Check bolts, torque, etc.
Drain carbs, clean and adjust (if required)
Lube throttle and gear linkage (and grease nipples)
Drain and refill fuel filter, check fuel connections, primer bulb, etc
Clean or renew thermostat
Grease splined drive-shaft, propeller shaft
Check propeller, thrust bearing, renew split pin
Drain and renew gear oil

There's plenty folk on here with leisure and commercial experience to point you in the right direction if you get stuck. Good luck.
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Old 06 January 2012, 17:22   #3
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go for it .
i dont know much about outboards, but was given a 2hp mariner that needed a impella, has no water was pumping out. i just went for it a started to strip it down from gearbox and upwards, i took photos has i went along, got to the water pump and fitted new impella, stuck it all back together and hay presto no water was pumping out still "why" has i was putting it all back together the little pin that sticks out the drive shaft that fits into the groove of the impella to turn it "fell out" cut a long story short got it all up and running, and peace of mind knowing it was all done, not only that, has it was my outboard now, i spent abit more time cleaning it right up removing all that had built up over the years. outboard was in storage for 17 years.
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Old 06 January 2012, 18:51   #4
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Thanks for the replies.
Any ideas where I can get a manual from?
Also I only have the serial no and no model no or age.
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Old 06 January 2012, 19:01   #5
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What's the serial number ?

Peter ~ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007
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Old 07 January 2012, 04:04   #6
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as with anything else, if youre not sure about something then go on youtube and look for a video on how to do it - youll be amazed what you can learn on there! and yes thats where i learned how to do an impellor.
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Old 07 January 2012, 05:34   #7
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Quote:
Originally Posted by Boats&Outboards
What's the serial number ?

Peter ~ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007
It's 09750953.

Thanks
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Old 07 January 2012, 05:38   #8
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That makes it Belgium built, 1993. See pic 1

Pic 2 shows one of many service CD's available on eBay. Not suggesting this seller over anybody else but It's the first I found

Peter ~ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007
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