Re: air cover on ’68 Johnson 20hp – needed?

[frankr]

That’s a real good question. I’d say it probably does make some effect, but hard to predict how much. Of course it doesn’t really restrict the air, but it does affect the sound waves, which in turn affects the air flow. It is there to act as a silencer. As for your blubbering problem, is the carburetor throttle pickup right on the money?