Hi all, this is my first post and hoping someone could help me.
I have a 40hp Mariner Code 6E9 S 019044, Which is a 1993 I believe.
I have just bought this engine for my boat and am having problem tuning it properly. The engine revs erratically, high at idle and then will slow down and stall eventually. I had it running on the boat yesterday but was very tempermental again, up and down in the revs and almost sounds flooded after going over a big wave??
The carburetors (2) are KEIHIN (japan). I have stripped the carb down and found some debri in the bowl but the jets were all clean and clear. I did notice that one float was sitting slightly higher than the other but the floats can't be adjusted because there plastic. The mixture screw according the the manual should be wound right in and then turned out between 1 1/4 - 1 3/4 turns, but the it wont even fire at these settings? I find that I have to turn it out well over 3-4 turns just to get it started??
The spark plugs look in good condition, although I did find one was rather loose so I thought this may have been the inital reason for the upset engine running but it is still the same
Thanks in advance, any help appreciated...
Mike.
Pics of engine if this helps?i
I have a 40hp Mariner Code 6E9 S 019044, Which is a 1993 I believe.
I have just bought this engine for my boat and am having problem tuning it properly. The engine revs erratically, high at idle and then will slow down and stall eventually. I had it running on the boat yesterday but was very tempermental again, up and down in the revs and almost sounds flooded after going over a big wave??
The carburetors (2) are KEIHIN (japan). I have stripped the carb down and found some debri in the bowl but the jets were all clean and clear. I did notice that one float was sitting slightly higher than the other but the floats can't be adjusted because there plastic. The mixture screw according the the manual should be wound right in and then turned out between 1 1/4 - 1 3/4 turns, but the it wont even fire at these settings? I find that I have to turn it out well over 3-4 turns just to get it started??
The spark plugs look in good condition, although I did find one was rather loose so I thought this may have been the inital reason for the upset engine running but it is still the same
Thanks in advance, any help appreciated...
Mike.
Pics of engine if this helps?i
