fseventy
Seaman Apprentice
- Joined
- May 20, 2005
- Messages
- 47
1975 Johnson 135. Carbs and waterpump rebult 2 years ago. Gas tank cleaned out this year. Compression 125-135 in all cylinders. Looks to be mostly origional except new starter. <br />Engine runs great for 1st 5 minutes than power drops considerably. Determined that it had weak spark in #1 cylinder (pulled the plug while running and not much change in #1, plus it just had a weak sounding spark compared to other cylinders) I started with the switching coils #1 with #2, but the problem stayed in #1 cylinder. After running poorly like this, the three other plugs are "used" and have carbon on them, while #1 is clean and wet with gas/oil.<br />ALSO... the rectifier is dead. I did the test and it failed, plus no change in voltage from idle to WOT.<br /><br />Do I test for the power pack next???