John and Kathy Boehm
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Engine Parts for unstyled B tractors


Convert your BO/BR/BI to electric start: Here are most of the parts you will need (except for the generator)


AB1845R Starter, turns over under six volts, but needs work (needs new bushing at end of bendix, possibly attention inside), as-is, $95

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B1606R flywheel with good ring gear, $100


AB1856R Flywheel guard, $100

B1608R Starter Ratchet, $60

B1031R generator bracket , with brazed repairs, $15

Generator adjusting strap, $5, not an original

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B1642R Support for dash and steering shaft with gauges, switches, conduit, wiring clutch lever, $125

B1694R Breather body, no breaks or repairs, $25

B1595R Crankcase cover with starter bracket, has been broken in half and brazed together, as-is, $20

Special deal: All of the above electrical conversion parts for $450


Wico Type C long lug magneto, works good and hot, and tested on a running tractor, $225

7/16-14 thread acorn nut for JD B valve covers, identical to correct original equipment, $1.50 each

A80R throttle lever, $20

B5R connecting rod #2 with good babbitt, $75

B5R connecting rod #1 with good babbitt, $75

B5R connecting rods with good babbitt, $75each
B5R with usable, but not super good babbitt, $25 each

B1303R crankshaft #1, Journals good, but driving disk splines show some wear and may need to be built up, as-is, $45 (50 lb.)


B1340R Crankshaft for BR/BO/BI serial number 329000 and up, excellent condition, good splines both ends, $175

Pair of pistons meauring 4.283 inch, .030 over?, $45 for the pair

Set of pistons from the B1305R block shown below, measure 4.535", $45 for the pair



B1305R block, bored oversize to 4.545, on bore is pitted, as-is, $50

B355R, 9/16 x 5 1/4 head stud, $4 each

Oil slinger on crankshaft, $7

B131R slinger cover, $7

Left hand and right hand bearing shells with good bearings, $50 each

B660R flywheel, good splines, no breaks or repairs, $45

Complete rocker arm assembly with original cast rocker arms, $90

B209R Rocker arm post: $20

B217R Camshaft: $25
B195R Cam gear: $40

B198R camshaft rh bearing, $10

B199R camshaft lh bearing, $10

B504R, tappet lever bracket stud, $5 each

24H200R washer, $1 each
B207R spring, $2 each

B206R tappet lever shaft, $5


B pushrods, $4 each

AB271R Cam followers, $5 each or $16 set of 4

B201R or B1103R Cam follower guide with drive for oil pump, $20

B357R head, no visible cracks or repairs, may need some new valve seats, good rebuildable core, $120

B357R head, need some valve guides and seats, as-is, $50

B73R manifold good condition, but one broken ear as seen in lower photo, $50

B17R muffler end casting, $10

B773R muffler casting for BO/BR, $15

Oil pump, with good screen, tested and pumps oil well, $70

Oil filter head B under #40781 (with B255R body and B435R head), $50

Oil filter head B above #40781 (with F96R head), $50

Oil filter housing for B above 40781, $25

OIl pressure regulator for B under #40781, $25

AB2705R Oil pipe, governor, $20

AB286R Oil pipe, pump discharge, $15

AB3335R Oil pipe, pump discharge, $15

AB289R, Oil pipe, to indicator and camshaft bearings, $15

AB290R Oil pipe, camshaft bearing, $25

AB288R Oil pipe, LH main bearing, $15

AB515R Oil pipe, RH main bearing, $15

B1097R, Elbow, side outlet, on camshaft and governoroil pipe, $15

AA2096R Oil filter outlet, $15

Complete oil filter bottom with A522R cover and all internal parts (used with paper oil filter), $40


Oil filter bottom that is used with the metal oil filter, $15

A522R Oil filter bottom cover, $7

D793R and D794R Oil level test cock, $10

7/16-14 thread acorn nut for JD B valve covers, identical to correct original equipment, $1 each


B211R cast valve cover, $25

B211R cast valve cover that has a repair, If you can use this, it is free with any order of other parts.

Pressed steel valve cover, $30

B215R Tappet oiler pipe, $15

B700R crankcase cover, $20, no breaks or repairs

B55R Breather cover and stack, $20

AB233R Breather core, $12

B76R carburetor to air cleaner pipe, $15

B59R short frame ventilator pipe, $15

A80R throttle lever, $25

B302R Unstyled B, BR, BO, BI, throttle rod, $25

B38R speed control rod, $18

B791R Speed control rod, $25


B403R upper water pipe, casting only, $15

B403R upper water pipe, $25

B650R Fan shaft support, $10, has the cut out area to fit the generator. .B650R is for all BR/BO and row crop B 3043-42199, $15

Fan shaft support for B 1000-42200, $15

B1006R fan shaft support for B 42200-59999, $10

B289R fan gear with slight pitting and some wear, $95


B289R fan gear with teeth chipped on bottom edge, as-is, $30

Fanshaft for row crop u/s B, $20

Fans tube for row crop u/s B, includes internal parts (bearing retainers, spring, etc.) at front end. $40.
Without internal parts, $15

Housing rear fan shaft bearing, $10

Bracket for oil and water gauges, $8

Governor and B1102R case, fan pinion gear is worn, otherwise complete and in good condition, $80 (35 lb.)

Bare B1102 R governor case, $20


B269R bare governor case, $20

B283R end cap for governor, $15

Other internal governor parts are available, please ask

B272R lever and shaft, $15

B272R lever and shaft, with good speed control lever, $25

Clamp for spark plug wire conduit, $16


B813R Front end support for BO and BR, 215 pounds, $100 (This is the early style with no eyebolt hole)

B813R Front end support for BO and BR, 215 pounds, $100, (This is the later style, with the eyebolt)

BO Main case with serial tag 326803, $125

BO Main case with serial tag 325629, $125

Cast frame front end support for unstyled B, $50