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Looking for a few more HP from my 1991 7745 non turbo for when i'm dealing with heavy snow with my 87" blower. I've seen a few posts touch on this but would like confirmation that it's only the uppermost of the 3 larger screws on the moving arm of the motorpal pump that needs to be turned in (clockwise - 1/4, maybe 1/2 turn) to achieve this. There are also 2 stationary smaller screws which i'm assuming are not the ones being referred to in the 2 posts i found on zetorworld. See below picture link.
https://imgur.com/a/RjubMwn
Tnks in advance for the help guys.
Regards