!!FunJohnny!!
Recruit
- Joined
- Jun 11, 2022
- Messages
- 3
This problem started 3 years ago. Started up and ran normally a couple of times then after a startup it was obviously not firing on all 3 cylinders. It seemed more like only one. I installed new plugs, no help. I took it to the marina, they put a plug tester on it and diagnosed it as a bad trigger. They installed a new one and ever since it has started very hard, lacks low-end power, has a hiccup during idle, skips and coughs a lot in the 1100 to 1800 rpm range. If I can get passed all of that, you can hear the other cylinders kicking in and it runs almost as good as ever lacking some speed and a couple of hundred RPM.
I do own the Clymer manual for this and all numbers below are from there. I resistance tested the coils, stator, and trigger. On the stator wires, Low-Speed coil reads 2300 instead of 3600-4200 ohms, high-speed coil was 110 ohms which is within the 90 to 140. My triggers reads 990 which is below the 1100-1400. Resistance tests on all coils prim and sec fell within spec. I then performed DVA tests only while cranking as it did not start for me today. Voltage to the primary windings of the coils was 84 and instead 180-280vdc. I tested the Switchbox stop circuit and instead of 200 -360 I am seeing 116. I unhooked the Black/yellow wire and this dropped to 103. After reading other threads tonight, I need to check that again because that sounds potentially very bad to me if the voltage is coming from that wire. I also did DVA test on low and high-speed charge coils. Low speed puts out 104 rather than 200-300 and high speed was at 34 which does fall within the 20-90. So I am only getting about 140v total during startup. I installed inline spark testers on all 3 cylinders and when cranking it I can see steady spark on 1, somewhat intermittent on 2 (maybe 50% of the time), and the occasional spark on 3 (like seconds or more in between sparks). Magnets under the flywheel are glued in and in perfect condition. My initial diagnosis is a bad low-speed charge coil in the stator and a bad trigger. Does that sound correct? My second question is if f the low voltage can cause the intermittent sparking or if I am probably looking at a damaged switchbox also?
I do own the Clymer manual for this and all numbers below are from there. I resistance tested the coils, stator, and trigger. On the stator wires, Low-Speed coil reads 2300 instead of 3600-4200 ohms, high-speed coil was 110 ohms which is within the 90 to 140. My triggers reads 990 which is below the 1100-1400. Resistance tests on all coils prim and sec fell within spec. I then performed DVA tests only while cranking as it did not start for me today. Voltage to the primary windings of the coils was 84 and instead 180-280vdc. I tested the Switchbox stop circuit and instead of 200 -360 I am seeing 116. I unhooked the Black/yellow wire and this dropped to 103. After reading other threads tonight, I need to check that again because that sounds potentially very bad to me if the voltage is coming from that wire. I also did DVA test on low and high-speed charge coils. Low speed puts out 104 rather than 200-300 and high speed was at 34 which does fall within the 20-90. So I am only getting about 140v total during startup. I installed inline spark testers on all 3 cylinders and when cranking it I can see steady spark on 1, somewhat intermittent on 2 (maybe 50% of the time), and the occasional spark on 3 (like seconds or more in between sparks). Magnets under the flywheel are glued in and in perfect condition. My initial diagnosis is a bad low-speed charge coil in the stator and a bad trigger. Does that sound correct? My second question is if f the low voltage can cause the intermittent sparking or if I am probably looking at a damaged switchbox also?
