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  • 1 Post By mdbee
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Old 06-24-2012
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What is wrong with my outboard?

So I went to start my 9.9 JP Merc today and when I was priming the outboard, I noticed gas dripping into the water. I opened it up and found a small hose that seemed to be disconnected, but I could not find a place where the connection would be. Any idea at all what could be wrong? The engine worked perfectly the day before.

Last edited by Mjfossler; 06-24-2012 at 06:13 PM. Reason: Grammar
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Old 06-24-2012
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Re: What is wrong with my outboard?

Quote:
Originally Posted by Mjfossler View Post
So I went to start my 9.9 JP Merc today and when I was priming the outboard, I noticed gas dripping into the water. I opened it up and found a small hose that seemed to be disconnected, but I could not find a place where the connection would be. Any idea at all what could be wrong? The engine worked perfectly the day before.
Had a 7.5, but I'll try to help. Did you try squeezing the primer with the cover off and locate the leak? Fuel lines should go somewhere, so I suspect the line is disconnected from the inside of the line fitting. Can you see a nipple near the end of the line? Also, some motors will have the filter in-line, and it may have become disconnected. Shouldn't happen, so that goes for a lot of things.
Good luck with it.
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Old 06-24-2012
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Re: What is wrong with my outboard?

Another thought. That may be a vent line or an overflow line. It may suppose to be left open. Your carb float may be sticking and fuel is simply overflowing. Try tapping on the carb float bowl gently.
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Old 06-24-2012
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Re: What is wrong with my outboard?

Almost positive that goes to the fuel pump. Look again, I bet there is a black plastic nipple missing a hose. They usually use a spring clamp to hold the hose on and this is insufficiant. I hate to say it but the main problem you have is it's a Mercury.
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Re: What is wrong with my outboard?

It was running the day before. Assuming that no one jacked with it, hoses rarely disconnect themselves, even if it didn't have a clip on it.
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Old 06-24-2012
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Re: What is wrong with my outboard?

A detail I forgot to mention- the hose in question is cut at an angle. Capt. A , I looked and looked but could not find any nipple in the area.
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Old 06-24-2012
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Quote:
Originally Posted by Mjfossler:888458
So I went to start my 9.9 JP Merc today and when I was priming the outboard, I noticed gas dripping into the water. I opened it up and found a small hose that seemed to be disconnected, but I could not find a place where the connection would be. Any idea at all what could be wrong? The engine worked perfectly the day before.
Hmmm, The hose came off?
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Re: What is wrong with my outboard?

Rarely is there a hose to no where. When you pump the ball does fuel come out of it? Follow it, where does it go? It may have vibrated off, stranger things Have happened. You can deduce what's going on here.
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Last edited by Capt.aaron; 06-24-2012 at 09:37 PM.
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Old 06-24-2012
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Re: What is wrong with my outboard?

That merc doesn't have an overflow line. Rare as it may occur, yours fell off its nipple somewhere. Get a hose clamp at the auto parts store, find where it goes, and secure it with the better clamp. Should be a fitting right inside the cowling, opposite the fuel hook-up. May be hidden deep, but its there. Other end goes to a square plate which is a diaphram pump.
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Old 06-25-2012
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Re: What is wrong with my outboard?

Thanks everyone, I will have another look.
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