horiconducker
Petty Officer 3rd Class
- Joined
- May 12, 2008
- Messages
- 96
Ive got a 1988 70hp johnson that has always seemed to run rough at slower speeds up to about 1800rpm (especially 1000-1800rpm)then its like a switch is flipped and it runs smooth as silk all the way to 5600rpms. Ive lived with it for awhile, but its now getting to me cause i know it should run better in this range. I have a oem manual and ordered a dva adapter to test ignition components. I know its not a carb or lync and sync problem. Im not new to working on outboards, but don't have a lot of electrical experience on them. I hooked up spark testers set to 7/16 gap to all cylinders and they jump the gap. To the questions, I disconnected the wires from the stator to power pack, and checked the voltage between the brown and brown with yellow stripe wires. First time i got 550v, way out of spec, came here on iboats did some searches went back out and retested, now i get 350v. Kept testing it a few more times, sometimes i get 550v others, i get 350, what could cause this? I then tested voltage on oranges wires going to coils from power pack and i only get 2.5v, same for all three, oem manual states it should be least 230v and cdielectronics says atleast 150v. Im not sure if I'm doing something wrong or what. The timer base seems to check out ok, I get around 2.5v on each wire, which seems high but the specs state only a minimum of .5v. Thanks for any input. ducker