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Old 27-06-2015, 12:26   #1
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Mariner 3.3 leaking fuel

Hi,

I have acquired an old Mariner 3.3hp which has been sitting in storage for a few years. As soon as I open the fuel tap I get fuel pouring out of the carburettor.

Other than checking if the float is stuck, anything obvious to look for?

Thanks!
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Old 28-06-2015, 07:05   #2
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Re: Mariner 3.3 leaking fuel

Probably the needle in the carb is corroded. Buy a second hand carb on eBay. Gareth of Jalfrezi


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Old 28-06-2015, 10:32   #3
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Re: Mariner 3.3 leaking fuel

Or the gaskets are worn and need replacing.

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Old 28-06-2015, 15:11   #4
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Re: Mariner 3.3 leaking fuel

Usually float related, or a hose leaking or poorly connected. Also check the needle valve. May as well take the carb apart so you will know how to do it next time. I've had mine apart numerous times...
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Old 29-06-2015, 14:18   #5
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Re: Mariner 3.3 leaking fuel

Thanks all. This was the float bowl:



Float was stuck solid. Cleaned it all out and that has fixed it.
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Old 29-06-2015, 16:56   #6
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Re: Mariner 3.3 leaking fuel

Good on you terah. Bit of advice. Get a set or two of spare gaskets. They are becoming harder to find as the engines are no longer in production.
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Old 29-06-2015, 17:14   #7
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Re: Mariner 3.3 leaking fuel

They are becoming harder to find as the engines are no longer in production.

Aren't they? I recently saw an advert offering new 3.3 Mercurys in the Caribbean - same motor/carb just a different cowling and badge
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Old 29-06-2015, 22:26   #8
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Re: Mariner 3.3 leaking fuel

Should have been more specific. They are no longer sold in the USA, havent been for maybe ten years.
Unfortunately I, like many other Yanks on CF, assume all posters live in the USA.
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