I bought this motor new in 2001. It has always started and ran fine, but after an hour or so trolling it idles poorly and makes trolling almost impossible untill it gets new plugs. I do use Omc cleaner in the gas about twice a year and I always use fresh gas. I have been using champion...
I bought this 40 johnson new in 2001. I troll a lot. This motor seems to foul out plugs more than it should, it runs fine at wot and at take off. New gas omc oil doesn't matter after an hour or two of trolling and it idles poorly. If i change the plugs its fine for about a month then it...
I JUST BOUGHT A 1992 MERC 40 4CYL FROM A DEALER. THEY ASSURED ME IT WAS FLAWLESS. TODAY WAS MY 1ST DAY OUT. IT STARTED GREAT AND RUNS WELL, BUT IT WILL NOT GO OVER A COUPLE THOUSAND RPMS. IN NEUTRALL ITS FINE. IT IS ON A TEN FOOT SPEED BOAT SO IT SHOULD FLY, IT WONT EVEN PLANE THE BOAT! IT...
