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Old 29 June 2006, 04:35   #1
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Mariner 75 2Stroke fuel leak

Wonder if anyone has seen this problem before.
I've noticed fuel accumulating and running down the leg. It seems to be coming out from the right side (viewed from prop) of the engine cowling where it meets the leg. Only a slow dribble but can't see what's causing it. Looks like there might be an open ended rubber hose that goes to that area but without stripping carbs etc out the way can't see where the hose comes from. Possibly float chamber overflow pipe? I don't know.

Late 90's 3 carb engine.

Any helpful advice appreciated.
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Old 29 June 2006, 05:46   #2
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Sounds like you might have a slightly loose drain screw on the bottom of the carb. This is normally conected to the pipe that pokes out the bottom of the cowling. Take the lid off and check the screw is tight.
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Old 29 June 2006, 06:55   #3
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Check all the piping that can be pressurized when you prime the fuel system with the bulb, some of them are prone to cracking and splitting, we had exactly the same especially when starting the fuel poured out.
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Old 29 June 2006, 10:01   #4
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Same problem but with totally different engine. Caused by sticking float bowls.
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Old 30 June 2006, 10:51   #5
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The only way you will know for sure is to take the bottom cowls off and have a look. Not really a good thing having fuel leaking under your hood!!!
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Old 30 June 2006, 13:16   #6
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Reminds me. My leak caught fire after a blowback. Rather exciting. Good job the fire extinguisher was near at hand.
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Old 01 July 2006, 06:57   #7
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Thanks for your replies.
Spanners out then!
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Old 09 September 2006, 15:46   #8
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Sorted

Taken a while I know but finally got around to taking cowls off to check out this problem. Turned out to be a small rubber pipe split away from the bottom of the inlet manifold. Quick repair and all is now well.

Thanks for your suggestions.
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