1990 Merc 2stroke 5 HP Fuel Issue

Outisland

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Recently bought a 90 2 Stroke 5 HP with less than 10 hours on it. First time it started, it idled fine, ran fine and was put away for a drive up to South Carolina. On the trip apparantly the external fuel housing for a remote tank snapped off. For the time being, I placed a fitted screw in the tubing to completely shut off any chance of leaking. I replaced the plug, as well as the fuel filter. Sprayed carb cleaner into it, took the carb apart and cleaned it up. Once all of this was done, I have now run into the meat of my issue. Whenever I crank the engine on the internal tank, it will idle for around 5 seconds and then sputter out each time without fail, especially when I try and give it gas. It definately sounds like a gas issue. Is there any advice that you guys could give me? It would be greatly appreciated.
 

Wingedwheel

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Re: 1999 Merc 2stroke 5 HP Fuel Issue

Re: 1999 Merc 2stroke 5 HP Fuel Issue

Sure sound like a venting problem. I've not dealt with that particular engine, but is there a switch or petcock to change over from internal to external tanks? Can you list a ser#?
 

Outisland

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Re: 1990 Merc 2stroke 5 HP Fuel Issue

There is a switch to select from internal and remote tanks. The remote tank is in the straight down position while the remote tank option is pointed to the right. I don't have a manual for this, bought the Selco manual but it isn't much help. The serial number is A887585 I believe. Thank you.
 

Outisland

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Re: 1990 Merc 2stroke 5 HP Fuel Issue

Checked the serial for the first time (I rightfully so feel like a complete idiot right now) and discovered that it was really a 1990. Thank you "Friend of the Family."
 

Wingedwheel

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Re: 1990 Merc 2stroke 5 HP Fuel Issue

If the fitting was broken off perhaps you got a piece of the wreckage in the fuel switch. I'd check that first and work my way toward the carb. You may have a stopped up fuel filter.
 

Outisland

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Re: 1990 Merc 2stroke 5 HP Fuel Issue

I cleaned the carb out once more after inspecting the fuel lines. Put it back on and now the engine will start and rev extremely high for about two minutes before dying. I will continue my fuel line inspection.
 
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