2005 Mercury 90HP 2-Stroke Oil Injection Issue

[4000198]

First time poster so hopefully I posted this topic in the right spot.

I replaced the fuel line and primer bulb that runs from my outboard to the fuel tank and when I removed the hose, the line was filled with gas that was already mixed with oil. Is this normal? I know there is a check valve where the oil line ties into the gas line and I am wondering if that is not functioning properly since the gas behind the valve is mixed with oil. After discovering the issue, I siphoned all the gas out of my tank and checked for oil, but did not see any oil in the tank or mixed with the gas in the tank. Overall the motor runs good, but is hard to start when cold. When I replaced the fuel line, the last time I took the boat out was a week prior, so it had been sitting for some time.

Please let me know if this is normal or if I have an issue with the oil injection system.

Thanks

 

[racerone]

Re: 2005 Mercury 90HP 2-Stroke Oil Injection Issue

There is no reason for this motor to be hard to start when cold.---Are you raising the fast idle lever and pushing the key in while cranking it over ?

 

[Texasmark]

Re: 2005 Mercury 90HP 2-Stroke Oil Injection Issue

I have the '02 year model of that engine and yes it is hard to start the first thing and it is proportional to how long the engine has been idle. Like if you used it yesterday, today it will start just fine. But if it sits for say a month, it takes awhile to get fuel to where it belongs. Once it starts for the day, it's a faster than you can get your finger off the key sort of thing. I have spent a lot of time on the subject and feel that it's in the design; carbs maybe. Mine uses the 2B2 carb which doesn't show up in my service manual. There they only list WME-XX and list the Main Jet size for the position in the engine. I have looked all over my carbs for WME and a number and see neither.

Mark