I was wondering if I might beg some advice about a two stroke outboard.
I have an old Mercury 2t 2.5 motor that has stopped running. It was a friend's stand-by motor on the back of his runabout and was very reliable. It still seems in good condition all-round although I've not taken the leg off to have a look inside.
It ran just fine until he left it out on the boat over winter, and now it's not wanting to start.
I've taken the carb apart and cleaned it out. The float valve seats nicely and I think the float isn't leaking, although I've only ever worked on bike 2t carbs so I'm not too sure how to check the float height on this (that and the fact that I can't find a manual).
I've cleaned it all out and checked the HT lead and socket, and although I don't have another plug spare, this one is clean and sparking nicely.
Fresh petrol, clean run from tank to carb, with the bowl filling nicely so that the petrol runs out of the drain screw if you undo it.
I'm stumped because I've done everything that I know of and it's still not right.
With some Easy-Start it'll fire for a while, rev, then die. I've spent about 30 minutes pulling it trying to see if the positions of the choke and throttle levers make any difference, as well as the mixture setting screw on the left, but I can't seem to find any answer.
Sometimes it'll fire once or twice, you can feel the resistance on the pull-cord lessen, but it hasn't yet started decently.
Then spray some 2 stroke mix, petrol/oil direct throught the spark plug hole, put plug back in and pull the cord. If it buzzes up for a second, then it confirms you have a fuel delivery problem.
If I remember, the carb is quite simple on this so just unbolt it. Remove the float bowl and float. Spray some carb cleaner in all the brass bits and any other nooks and gaps. Use a compressor if you have one. Make sure all the small holes are clean. Clean any gunk from the float bowl etc.
MAKE SURE THE MIXTURE SETTING IS CORRECT. Engine might still run but can go bad if run lean or rich for too long!
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Seagull Outboards, I work on the principal that they are never "dead"
By the way, my pic is of part of my Seagull outboard collection! 45 or something there.
The response above states to use a 2 stroke mix to spray into the carbs. Do not use quick start on a 2 stroke motor. The only lubrication a 2 stroke gets is from the oil mix in the fuel. Using quick start runs the motor without oil, read BAD!
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1996 Crestliner 2160 Phantom, 1996 Evinrude 130 HP
quick start is not your friend unless you have a 4 stroke
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Seagull Outboards, I work on the principal that they are never "dead"
By the way, my pic is of part of my Seagull outboard collection! 45 or something there.
2t 2.5 Mercury starting question
Linear Mode
