Originally Posted by C2 RIBS
Cheers for everyones knowledge. Engine good after service and just out of warranty, it is fixed to 30hp and have fitted a guard called propguard, an 11inch model for this engine, so will have to see how it performs when next out and then tinker with your ideas. Cheers Ian
Just to get the nail out, your 25 Mariner was factory delivered adjusted to: 20º or 25º timming ? Which one ?
Have you changed the 25 air restrictor gasket for the open air 30 gasket ?
To have a well converted 30 HP engine both issues works together.
Remove the prop guard, with same prop, why don't you water test the 30 converted engine and let us know if it was better than when at 25 at full throttle. Once adjusted to 30 HP must fine tune engine lean/rich, gas/air mixture needle, slightly towards rich.