woodstock28655
Cadet
- Joined
- Jul 5, 2007
- Messages
- 6
As stated in the title I have a 1972 100hp Johnson....picked this motor up locally for a couple hundred bucks....here is what i found on my initial once over
the previous owner must have changed all these parts to try and eliminate the problem he was having....there is still a problem within the ignition system as far as I can tell.....
When I pull a plug wire and check spark...it is real erratic about firing.....all 4 cylinders do this....when you crank the engine...it is almost like there is a timing problem....runs badly for 30 secs or so and quits, but will crank right back most of the time....pull the plugs after this and they are a bit wet/oily...the stupid thing sometimes kicks backs and cranks backwards (and from what I see, is electrically NOT supposed to happen) and runs a bit smoother backwards than the correct rotation.....ALSO...I did read (CDI troubleshooting guide) "Make sure the triggering ring is the correct one for the type ignition being used. Phase II ignitions require the sensor with wide gaps between the lobes". there were drawings of the 2 different rotors and I have the Phase I rotor....
My question is how do I know which Phase ignition I have????? and how much will this affect the timing if my ignition is Phase II??
I have purchased a manual...should be here in a few days. I also ordered a spark gap tool and DVA adapter for my meter.....any suggestions in the meantime would be great....
- 105 to 110 compression on all 4 cyl's
- newer CDI 113-8362 pulse pack (looks like within a year)
- ignition coil replaced with pack
- newer stator and rectifier
- carbs cleaned/rebuilt
- newer pickup sensor in timing base
- new wires
- new plugs
the previous owner must have changed all these parts to try and eliminate the problem he was having....there is still a problem within the ignition system as far as I can tell.....
When I pull a plug wire and check spark...it is real erratic about firing.....all 4 cylinders do this....when you crank the engine...it is almost like there is a timing problem....runs badly for 30 secs or so and quits, but will crank right back most of the time....pull the plugs after this and they are a bit wet/oily...the stupid thing sometimes kicks backs and cranks backwards (and from what I see, is electrically NOT supposed to happen) and runs a bit smoother backwards than the correct rotation.....ALSO...I did read (CDI troubleshooting guide) "Make sure the triggering ring is the correct one for the type ignition being used. Phase II ignitions require the sensor with wide gaps between the lobes". there were drawings of the 2 different rotors and I have the Phase I rotor....
My question is how do I know which Phase ignition I have????? and how much will this affect the timing if my ignition is Phase II??
I have purchased a manual...should be here in a few days. I also ordered a spark gap tool and DVA adapter for my meter.....any suggestions in the meantime would be great....
