Abstract: A foam lined pontoon log in which polyurethane flotation foam is sprayed onto the interior surfaces of the pontoon log and adheres to the interior surfaces of the pontoon log. The flotation foam is built up to a desired thickness, but does not completely fill the interior of the pontoon log. The foam lining of the pontoon log interior surface provides the pontoon log with improved resistance to water leakage through the outer shell of the log, improved structural rigidity, and improved sound dampening. The pontoon log may have a nose cone section at its bow end with splash guard plates. The interior of the nose cone section is filled with flotation foam to a height above the splash guard plates to prevent water ingress associated with pin-sized holes resulting from welding of the splash guard plates to the pontoon log body.

Abstract: An engine having an engine block defining at least two cylinders having respective cylinder heads. Pistons are reciprocal within respective ones of the cylinders. The cylinders have respective fuel inlet ports and exhaust ports and two of said cylinders have an idle relief port disposed between their respective exhaust port and head ends. The idle relief ports of the cylinders are interconnected by a passageway for providing communication between the idle relief ports of said at least two cylinders. This has been found to provide reduced pull start resistance, reduced engine vibration during idle, and significantly reduced horsepower loss over a wide operating range which horsepower loss is normally associated with idle prior art relief structures which vent directly from idle relief ports to atmosphere.