I've recently acquired a 90HP Johnson V4 (circa 1985-1990). The previous owner said that they had modified it by replacing some things from a higher HP motor - i.e. heads, carbs, ignition, exhaust. The net effect of these changes was to increase the HP to 140. <br /><br />I saw a similar...
I've recently acquired a 90HP Johnson V4 (circa 1985-1990). The previous owner said that they had modified it by replacing some things from a higher HP motor - i.e. heads, carbs, ignition, exhaust. The net effect of these changes was to increase the HP to 140. <br /><br />I saw a similar...
