Just put a A Turbo 1 prop on my 1990 Johnson 150GT. It came with a Guardian SQ-Lok hub and all the hardware including a new thrust washer. The prop seems to fit fine, but it does not seem to go into the lower unit as far as the original. There is no gap between the lower unit and prop, just is not a flush fit. The lip is a little longer on the new prop. I made sure the hub is completely in the new prop. Is this an issue? Or just standard with non oem props?
