Johnson Service Bulletin 990 - 90 HP Test Wheel

Issued October 22, 1963, this bulletin introduced test wheel part 379695 for tank testing the Johnson 90 HP V4M(L)-10S and later engines. The original bulletin is reproduced below.

Johnson Motors Service Bulletin letterhead

October 22, 1963

SUBJECT:  TEST WHEEL - 90 HP - PART NO. 379695

MODELS:   V4M (L)-10S and up

A test wheel is now available for tank testing the new 90 HP engine.  See Figure 1.

Recommended full throttle engine speed, for the 90 HP engine, is 4400-4800 RPM with this test wheel installed.

Original factory illustration of 90 HP test wheel 379695, arrow identifying casting number 310794
90 HP Test Wheel - Part No. 379695

It is suggested by the Service Department that dealers label test wheels when they are received, by marking them with the horse power of the engine on which they are used.  This marking can be placed conveniently on the circumference of the wheel.  Marking test wheels in this manner, enables shop personnel to select the correct wheel immediately for any given engine.

Any of the various felt tipped ink marking cartridges that are available through most office supply stores will do the job nicely.  The ink in the majority of these cartridges is indelible, and will not wash off in the test tank.

The 90 HP test wheel can be identified also by a casting number which appears on its hub - (310794).  See Arrow, Figure 1.

Part No. 379695 Test Wheel is available at $4.75 net.

SEND ORDER TO:

OUTBOARD MARINE CORPORATION PARTS DEPOT
P.O. Box 470
GALESBURG, ILLINOIS

Include full prepayment with order.  Do not order test wheels from your Parts Distributor or from the factory.

JOHNSON MOTORS
Robert Compton
Administrative Assistant