What Year? Merc "40" 4 hp SN 7113598

pperfitt

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Jul 24, 2008
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SN 7113598 Made In Canada

I checked the links in TheWoodCrafter's sticky "What year is my mercury out board?", but I did not find anything definitive.

I bought the motor in the spring for my canoe and just got around to using it this week. I discovered that fuel runs out the mouth of the carb if I open the fuel shut-off valve. I dismounted the carb and opened the bowl. It was rusty inside and the needle valve (a pin with a rubber point) was sticking. The float is intact and moves freely. I cleaned out most of the rust in the bowl with sandpaper, cleaned it thouroughly & re-assembled.

Motor runs well, but still leaks fuel, so I guess I need a new needle pin? carb kit? I don't know much about carbs, so please advise.

Thanks Phil,
Ottawa Canada
 

Laddies

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Sep 10, 2004
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Re: What Year? Merc "40" 4 hp SN 7113598

It was the 125th Gnat built in Canada in 1978
 
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