Paul H Jennerjahn

58544640, Dec 29, 1998

May 6, 1997

8/851908

Mark E. Sweeney - Oshkosh WI
Paul H. Jennerjahn - Greenville WI

Brunswick Corporation - Lake Forest IL

F02M 1504
H05B 300

219207

A carburetor anti-icing apparatus and method for a marine drive is provided for heating a carburetor to a temperature above that at which ice may form in the idle and progression circuits of the carburetor. Several heaters, heat sources, and methods are disclosed for heating the carburetor. In one embodiment an electrical heating element is mounted to the carburetor body near the fuel orifices which make up the idle and progression circuits. In another embodiment, engine cooling water is circulated through a heater housing mounted to the carburetor body. In yet a further embodiment, engine exhaust from the marine drive is conveyed through the heater housing mounted to the carburetor body. A thermally conductive gasket is used to improve heat transfer. The carburetor anti-icing apparatus and method also improves low speed running performance due to the improved fuel vaporization resulting from the increased temperature in the progression circuit.

56289278, May 13, 1997

Sep 8, 1994

8/302500

Mark E. Sweeney - Oshkosh WI
Paul H. Jennerjahn - Greenville WI

Brunswick Corporation - Lake Forest IL

B60L 102
F02M 3112

219207

A carburetor anti-icing apparatus and method for a marine drive is provided for heating a carburetor to a temperature above that at which ice may form in the idle and progression circuits of the carburetor. Several heaters, heat sources, and methods are disclosed for heating the carburetor. In one embodiment an electrical heating element is mounted to the carburetor body near the fuel orifices which make up the idle and progression circuits. In another embodiment, engine cooling water is circulated through a heater housing mounted to the carburetor body. In yet a further embodiment, engine exhaust from the marine drive is conveyed through the heater housing mounted to the carburetor body. A thermally conductive gasket is used to improve heat transfer. The carburetor anti-icing apparatus and method also improves low speed running performance due to the improved fuel vaporization resulting from the increased temperature in the progression circuit.

46681990, May 26, 1987

Dec 12, 1985

6/808136

Michael A. Freund - Oshkosh WI
Paul H. Jennerjahn - Appleton WI
David W. Kusche - Oshkosh WI

Brunswick Corporation - Skokie IL

B63H 2134

440 89

An exhaust system for an outboard motor (10) includes a main exhaust passageway (16) extending through a partially water filled chamber (17) in the drive shaft housing (13). An inlet idle relief passage (23) connects the top of the chamber (17) with the main exhaust passageway (16) and an outlet passage (24) connects the top of the chamber (17) with the atmosphere. The system thus defines an effective exhaust silencer for the idle exhaust.