RE: inverted mount 4strokes ??
G'day Mate,
The only time you will have trouble with an inverted motor, 4stroke or 2 stroke, is when your fuel tank is too high or too low, it MUST, be set so that the tank centre-line is level with or no more than 1/4"(6 mm) to 3/8" (10mm), below the fuel nipple, NOT above.