1981 Johnson J10RCID

by John C.
(Milton, Florida, USA)

While testing in a tank after replacing power pack and coils, the engine seems to run fine at idle, a little smoky, but runs fine, except - after it warms up, it "coughs" as if it misfires, but then continues to run fine until it "coughs" again, a few minutes later. Is this normal?

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