Johnson Service Bulletin SB-848 - Electric Starters

June 1, 1961. Johnson Motors published a cross-reference for Johnson and Auto-Lite 12-volt starter motor parts used on 18, 35, 40, 50, and 75 HP engines. The factory exploded illustration and detailed parts cross-reference follow the introductory page.

Johnson Motors Service Bulletin letterhead
June 1, 1961
Bulletin No. SB-848 Electric Starters
SUBJECT: A cross reference of Johnson & Auto-Lite 12 volt starter motor numbers. 18 h.p. models FDE(L)-11 thru 12 & subsequent electric starter kits; 35 h.p. model RJE(L)-19 & 19M; RDE(L)-19 thru 19C; RDS(L)-20; RDS(L)-21 & 21B; 40 h.p. models RDS(L)-22 thru 23; 50 h.p. models V4S(L)-10 thru 11B; 75 h.p. models V4S(L)-12 thru 13C; 75 h.p. models V4A(L)-13 thru 13F.
The following cross reference of detail service parts from Auto-Lite to Johnson, and vice-versa, is used to determine part numbers in the same manner as parts catalogs are used. Simply locate the part in the exploded illustration contained on page 2, note the detail photo number, and refer to the same number on the following pages for the desired Johnson and corresponding Auto-Lite part numbers. Columnar headings are self-explanatory and should present no problem in understanding them.
In all instances of determining detail part numbers, it will be advantageous and time- saving to predetermine the Auto-Lite model number in order that the correct detail part may be accurately chosen. The Auto-Lite model numbers are stamped on the frame and can be readily obtained from it.
Prices of the detail Johnson parts, or superseding part numbers, will be found in the extreme right hand column. All prices listed are current, but are subject to change without notice.
Except as otherwise indicated, dealers order all parts by the Johnson number only from your parts distributor. Do not order from the factory or the parts depot.
JOHNSON MOTORS
W. W. DeWees W. W. DeWees Service Department
WWD:eb
NOTE: Post on your FD, RD (35 & 40 h.p.), V-50 & V-75 indexes
Original factory technical illustration and detailed Johnson Auto-Lite starter motor parts cross-reference, page 2
Original factory technical illustration and detailed Johnson Auto-Lite starter motor parts cross-reference, page 3
Original factory technical illustration and detailed Johnson Auto-Lite starter motor parts cross-reference, page 4
Original factory technical illustration and detailed Johnson Auto-Lite starter motor parts cross-reference, page 5
Original factory technical illustration and detailed Johnson Auto-Lite starter motor parts cross-reference, page 6

Starter motor parts cross-reference

Searchable index of unique identifiers printed in SB-848, pages 2-6. The original factory charts above remain authoritative for matching each part to its starter model, application, replacement instruction and 1961 price. Identifiers below are indexed for discovery, not presented as interchangeable parts.

Johnson detail service part numbers

Bracket and mounting hardware

307341306488302471203864204382204591204590204592204761204763204762204587

Brushes, springs, felt and commutator-end components

277707278244308141308137278235278165278242278243204760

Drive-end head, armatures and washers

278022277705278238278236204588204589278188278160278161278240278241

Terminal hardware and field-coil components

303932306396308140308142308135378469378468378466378467308126308143308139308136308125

Insulators and frame hardware

308146308145308144308138308155

Johnson complete starter motor assembly numbers

376850377248278024278023278245278232

Auto-Lite starter motor model numbers

MDO 4002MMDO 4003MMDW 4001MMDW 4102MMDW 4103MMDW 4104M

Auto-Lite detail service part identifiers

MDW-65X-1745 A19H5-101MDO 20MDO 120MDW 20MDW 21MDW 120MDW 220MDW 320MDW 420MDH 4017-3717-40MDH-18MDH 4219-3619-4019-39MDH 3922-1122-1222-1522-14MDO 38MDH 37MDO 2006MDO 210616-7216-7616-8016-79X-327543-7SSA-43AMAK 49A19X152120-5720-5820-5920-6020-6120-62MDO 43MDO 53MDO 22MDW 22VRB-27CVRB-27JVRB-27LMDO 52X-3075

Factory note: Some parts were not sold separately and required contacting an Auto-Lite dealer. Several Johnson numbers are marked as superseded in the price column. Refer to the original chart for the exact replacement and starter application.