Hi I just bought an old boat whit a Johnson 90 hp 1985 (Model: J90TLCOS) outboard motor on it. The motor had not been run for a few years. After cleaning out the carb and replacing the water pump I tried to get it running. But it would not start. I did a compressor test and all the cylinders where fine. I am getting fuel. But a weird think is happening with the sparkplug.
So here is my problem.
If I have no sparkplug in the cylinder I get a spark but as soon as the sparkplug is screwed in there is no spark on that cylinder. For example I remove all the sparkplugs and I get sparks on all 4 ignition cols , then I screw in the spark plug for cylinder 1 and I only get sparks on ignition cols 2,3,and 4.
Does any one have any idea what is going on?
Best regards
Steinn
So here is my problem.
If I have no sparkplug in the cylinder I get a spark but as soon as the sparkplug is screwed in there is no spark on that cylinder. For example I remove all the sparkplugs and I get sparks on all 4 ignition cols , then I screw in the spark plug for cylinder 1 and I only get sparks on ignition cols 2,3,and 4.
Does any one have any idea what is going on?
Best regards
Steinn