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1984 25hp Mercury doesn't run right

Jordan Brown

New member
Hi I have a 1984 mercury 25hp 2stroke 2cylinder single carbureted outboard and it sounds like it's missing I have put new coil packs and plugs but still runs ruff. And even hard to start, I have to put starting fluid in the carb in order for it to start. Will gladly appreciate the help! Thanks for your time.
 
What is your compression? Have you done an actual spark test?
I have no idea of compression all I know is the guy that helped me get it going said it had good compression but he doesn't know why it's running rough and yes I did do a spark test the spark seemed fine but the guy has no idea of why it's hard to start/running rough
 
Your motor is an 1989 model. Do the compression test and spark test

251989ELB385500 - C221499A742200
Ok I will do the spark and compression test I thought it was a 1984 because at the end of The serial number it had number 84 thanks for The help I am new at the boat motors, I will try that. But what site did you go on to look up the motor with the serial number?
 
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