I have a 87 90hp that I just rebuilt and the starboard side is running lean. Plugs on the port side look perfect, chocolate, but the starboard side is lighter.
They look like 23 on this chart:
http://www.dansmc.com/spark_plugs/spark_plugs_catalog.html
which is "Hot or lean but OK(?)"
I noticed that my intake manifold is missing the extension on the starboard side, I have heard that if you run without the manifold cover these motors can run lean. I am wondering if the missing extension off the manifold could cause the same issue?
The part I am missing is:
0330939
EXTENSION, Starboard side
I just cleaned out the carbs, they were pretty clean to begin with, but I did not take off the welsh plugs. I did shoot carb cleaner through the idle circuit and it came out of the three tiny holes well.
Thanks in advance, this forum is awesome.
They look like 23 on this chart:
http://www.dansmc.com/spark_plugs/spark_plugs_catalog.html
which is "Hot or lean but OK(?)"
I noticed that my intake manifold is missing the extension on the starboard side, I have heard that if you run without the manifold cover these motors can run lean. I am wondering if the missing extension off the manifold could cause the same issue?
The part I am missing is:
0330939
EXTENSION, Starboard side
I just cleaned out the carbs, they were pretty clean to begin with, but I did not take off the welsh plugs. I did shoot carb cleaner through the idle circuit and it came out of the three tiny holes well.
Thanks in advance, this forum is awesome.