Home › Forum › Ask A Member › 1966 Johnson 20 Stumbles, Won’t Idle › Re: 1966 Johnson 20 Stumbles, Won’t Idle
July 29, 2017 at 5:28 am
#62358
It could be a crankshaft seal starting to leak air into the crankcase causing a lean running condition. Here’s how I check the upper seal for leaks: