Johnson Service Bulletin SB-980-A - Break-In Procedure for Replacement Powerheads

Issued January 15, 1964, this bulletin clarifies break-in requirements for warranty replacement powerheads on 1964 Johnson outboards, including fuel-to-oil ratios and the consequences for warranty consideration.

Johnson Motors Service Bulletin letterhead
January 15, 1964
SUBJECT: BREAK-IN PROCEDURE FOR REPLACEMENT POWERHEADS.
ON ENGINES: All 1964 Models - 3 HP thru 90 HP.

The initial break-in of powerheads replaced in warranty on any 1964 engine must be in strict accordance with instructions that appear in the Owner's Manual for the particular engine. Refer to Service Bulletin No. SB-980.

Warranty powerhead replacements on 1964 engines that are not handled according to the recommended break-in instructions will not be subject to future warranty consideration. Be particularly observant of this procedure, therefore, to protect your customer's warranty.

Remember: The break-in period for all 3 HP thru 18 HP engines is five (5) hours and for all 28 HP thru 90 HP engines is ten (10) hours, during which time 24:1 fuel/oil mixture must be used. The 50:1 fuel/oil mixture can then be used after break-in on all 1964 engines.

Sincerely,

JOHNSON MOTORS

Robert Compton
Administrative Assistant

RC:eb

NOTE: Post on all indexes, 3 HP thru 90 HP, under the heading "Miscellaneous".

Related service bulletin

SB-980 - Referenced by SB-980-A for the original break-in instructions.