90 HP Test Wheel - Johnson Part No. 379695

Factory tool: Test wheel (sometimes called a test prop or test propeller) for tank testing the Johnson 90 HP engine. The bulletin documents this application; other applications have not been verified.

Part number: 379695
Casting number: 310794 (on hub)
Models: V4M(L)-10S and up
Recommended full-throttle test speed: 4,400-4,800 RPM with this wheel installed.

Factory illustration of Johnson 90 HP test wheel part 379695, showing casting number 310794
Original factory illustration from Johnson Service Bulletin 990 (1963). The casting number on the hub is 310794.

Factory documentation

Johnson Service Bulletin 990, October 22, 1963 - introduction, labeling guidance, application, and original ordering instructions.

Historical note: The bulletin lists an original net price of $4.75 in 1963. This is not a current price.

Identify by casting number 310794. No replacement or superseding part number is identified in this bulletin.