Rotary Keyed Marine Boat Ignition Switch M-850-BX 3-Position 87-17009AZ 87-88107 35hp you are replacing this with

you are replacing this with some intake that already has the same GM casting number

but hopefully they match what you are replacing

Carburetor Choke knob and Linkage:

Relevant Part Numbers:  819748A3 819748A4 81748A6 819748T6

Rotary Keyed Marine Boat Ignition Switch M-850-BX 3-Position 87-17009AZ 87-88107 35hp you are replacing this withPart Number(s) Included Cole Hersee M 850 BX Marine 3 position Keyed Ignition switch Suitable Replacement for: (from the manufacturer, but I doubt some of these entries) General Marine Works 3976 , 4107 Sierra 18 1803 18 1802 Pollak 33 105 Johnson 393301 Evinrude 508180 Mercury 87 17009AZ Mercury 87 88107 Other Details New in box Includes Key Fits into 7 8" or 1" hole 15 Amp 12V Purchase with confidence!