1984 Mercury 75hp 4Cyl. 2 Cycle Serial # 6559253.
Ended last season like this... WOT runs just fine. Idles forever smooth as silk.
Try and drop it into gear and it just quits. You have to keep restarting over and over and try to quickly slam it into gear to get underway. Any help would be...
Please give some troubleshooting tips on this. (year, hp, model .. 86 25-ESJ)
Both plugs no spark. Safety switch is fine. It's not been run for almost 1 year and ran very good then. I've got a nice DVM but am unsure of various readings I should have at various components.
1986 25 Yam. low rpm.
Engine has great hole shot. (Beats my 25 John. every time.) Engine will not come up to speed. It seems to rev to a certain rpm and just throttle itself down to a steady rpm. (I can maintain his speed at 3/4 throttle.) All linkages seem to be fine. Carb is full stroked...
I'm new to this group and have enjoyed your forums. I've now come across something I'm having trouble fixing/troubleshooting. Please help.
Here goes. 86 25-ESJ Yamaha. Main trouble. Engine has great hole shot but will not come up to speed. Compression is very close to 120 in both cylinders...