This is the 1990 Johnson 200 I bought on ebay, and really thought I had the last of the problems taken care of. I had done the tests on the electrical system as called for in the factory manual, and they pointed to a bad timer base. I found a timer base off a 1996 Johnson 225 which was being parted out due to a cracked block, installed it, and the engine idled fantastic on muffs, better than it ever had before. When I took the boat for a test drive it ran great, I couldn't have been happier.
Fast forward to today. I just got back from the lake and it's running
EXACTLY like it did before I replaced the timer base. Idles poorly, I have to give it throttle just to keep it idling, and there's an intermittent miss at idle and no-wake speed where it will die if I don't immediately feed it some throttle. It was also about 5 mph off on the top end as compared to the previous time out as well.
I haven't repeated the tests on the electrical system yet - I'm too
at the moment to mess with it. But if in fact that timer base I installed failed so fast - why? What makes them go bad? Could a problem with the rectifier/regulator kill a timer base? I don't believe I have a bad regulator/rectifier because it's charging (about 14.8 V at speed) and the tach works properly, but I haven't done any testing on that so I can't say for sure that it doesn't have a problem.
Anyone?
thanks
