Johnson Service Bulletin SB-971 - Electro-Static Ground Plate Kit

SB-#971

August 15, 1963

SUBJECT: Electro-Static Ground Plate Kit

Figure 1 - New Plate

Figure 2 - Corroded Plate

Recently you received an announcement by OMC Accessories advising of the availability of an Electro-Static Ground Plate Kit. We feel sure that practically every dealer, particularly those in salt water areas, have found it necessary to replace parts because of corrosion (eating away) by electrolysis. These replacements in some cases can run into hundreds of dollars not to mention the inconvenience caused to the owners of the engines.

This easy to install kit will minimize corrosion by electrolysis and thereby assure your customers a minimum of unnecessary costly repairs. The plate itself is made of a special self-sacrificing alloy, which will corrode before the motor components corrode. The plate should be inspected periodically, and when 50 percent corroded must be replaced or electrolysis will begin to corrode the motor components.

Page 2 SB-971

The foregoing illustrations (Figure 1) of the new plate and (Figure 2) of the corroded plate will give you some indication as to when the plate should be replaced. We are sure you realize that if the affect shown on the corroded plate were allowed to develop on an engine to this degree, major repairs would be necessary.

Since the plate itself must be sacrificial to do its intended job, the normal warranty does not apply to its replacement.

This kit may also be used as a ground plate on permanently installed fuel systems, it is complete with attaching bolts, seals, wiring and instructions.

Place your orders now with your parts distributors.

PART NO. DESCRIPTION SUGGESTED DEALER LIST PRICE DISCOUNT 171637 Electro-Static Ground Plate Kit $ 4.95 40% 121191 Replacement Ground plate 1.20 36%

Sincerely,

JOHNSON MOTORS Robert Compton Administrative Assistant

RC:eb

NOTE: Post on your Miscellaneous index.