View Full Version : Mercury 40HP S39438 Model2 problem w carb

J Heiserman
07-05-2003, 12:46 PM
" I have purchased a Mercury, 40 H.P. The problem with it is I have to have the chock on full chock to get it to run. I thought the carb may need cleaning so I have cleaned the carb really good because it did need a cleaning. However, the problem still exists, can you help me? Also I have given you the serial and model #, can you tell me what year the motor is? Thanks in advance for any info you may have. "

07-06-2003, 09:12 AM
402 was early 70's. Clean your carburetor again you may have missed the high speed jet or other small passages.

J Heiserman
07-06-2003, 07:06 PM
" Sparky, thanks for info on carb, I cleaned it again and it works like a charm. I missed some parts first time around. Also thanks for info on the year of the motor. "