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Tune Up Specs

There is a legend at the bottom of the page describing some of the terms used here.

Make Model Point Gap Spark Plug Gap Timing Mark On Spark Occurs Firing Order Int. Valve Clearance Exh. Valve Clearance Comments
Allis Chalmers WC,WD,WD-45,WF .020 .030 FLY TDC 1-2-4-3 .010H .010H For intake & exhaust valve clearance, WD-45 set at .012H
Allis Chalmers U,UC .013 .035 FLY TDC 1-2-4-3 .010H .010H  
Allis Chalmers H-3 .020 .025 FLY TDC 1-2-4-3 .010H .016H  
Allis Chalmers G .020 .025 FP NOTCH 1-3-4-2 .010H .010H  
Allis Chalmers D-19 .022 .025 FP TDC 1-5-3-6-2-4 .015H .020H  
Allis Chalmers D-10,D-12,D-17 .022 .025 FLY TDC 1-2-4-3 .013H .013H Spark plug gap for LPG is .020. Int. & Exh Valve clearance for Ser. No. D-10 (3501) D-12 (3001) & Up is .009H and .015H
Allis Chalmers C,CA .020 .030 FLY TDC 1-2-4-3 .010H .012H  
Allis Chalmers B,IB,RC .020 .035 FLY TDC 1-2-4-3 .010H .010H  
Allis Chalmers A .020 .032 FLY TDC 1-3-4-2 .012H .012H Point gap is for Fairbanks. Set Splitdorf .012-.015
Allis Chalmers D-14,D-15 .022 .025 FLY LINE 1-2-4-3 .009H .015H Point gap is for D-15 only, set D-14 at .020. For spark, LPG set center. For Int. & Exh. Valve clearance, D-14 set at .013H
B.F. Avery V .020 .028 FLY TDC 1-2-4-3 .006H .006H  
B.F. Avery A & R .020 .025 FLY TDC 1-2-4-3 .008C .010C Point gap for Magneto set to .015
Case VA Series .020 .025 FLY   1-3-4-2 .014C .014C Point gap for Magneto set to .015
Case V Series .020 .025 FLY DC 1-3-4-2 .014C .014C Point gap set Splitdorf at .015, Fairbanks at .020
Case S Series .010 .025 FLY HOLE 1-3-4-2 .010C .010C  
Case R Series .015 .030 FLY DC 1 1-3-4-2 .010C .012C  
Case LA Series .015 .030 FLY D 1-3-4-2 .018C .018C  
Case C & L Series .015 .025 FLY D 1-3-4-2 .018C .018C  
Case D Series .010 .025 FLY D 1-3-4-2 .018C .018C  
John Deere M,MT .020 .025 FLY TDC 1-2 .012C .012C For magneto set point gap to .015
John Deere L,LA .020 .025 FLY TDC 1-2 .006H .008H For magneto set point gap to .015
John Deere H (All Fuel) .015 .030 FLY   1-2 .015H .015H Spark occurs when dot or "LH-Impluse" aligns with index on cover or case.
John Deere G (All Fuel) .021 .030 FLY   1-2 .020H .020H For magneto set point gap to .015 - Spark occurs when dot or "LH-Impulse" aligns with index on cover or case.
John Deere D (All Fuel) .015 .030 FLY   1-2 .030H .030H Spark occurs when dot or "LH-Impluse" aligns with index on cover or case.
John Deere B (All Fuel & Gas) .015 .030 FLY   1-2 .020H .020H Spark occurs when dot or "LH-Impluse" aligns with index on cover or case.
John Deere A (All Fuel & Gas) .021 .030 FLY   1-2 .020H .020H For magneto set point gap to .015 - Spark occurs when dot or "LH-Impulse" aligns with index on cover or case.
John Deere 80 Cranking Engine .020 .025 FLY 30 deg. BTDC 1-2-3-4      
John Deere 70 Cranking Engine .020 .025 FLY 30 deg. BTDC 1-2-3-4 .020H .020H  
John Deere 70 (LP), 60 (LP) .022 .030 FLY 5 deg ATDC 1-2 .020H .020H  
John Deere 70 (Gas) .022 .030 FLY 10 deg. ATDC 1-2 .020H .020H  
John Deere 70 (All Fuel), 60 (All Fuel) .022 .030 FLY TDC 1-2 .020H .020H  
John Deere 50 & 60 (LP & Gas) .022 .030 FLY 5 deg ATDC 1-2 .020H .020H  
John Deere 50 (All Fuel) .022 .030 FLY TDC 1-2 .020H .020H For point gap, for LP set TDC.
John Deere 40 (All Fuel) .022 .025 FLY 3 deg ATDC 1-2 .012C .012C For point gap, for LP set TDC.
Ford 501,601,701 (Gas & LP) .025 .027 FLY 4 deg BTDC 1-2-4-3 .015H .015H For spark, LP set a 7 deg.
Ford 600,700 (Gas & LP) .025 .027 FLY 8 deg BTDC 1-2-4-3 .015H .015H For spark, LP set at 11 deg. For spark plug gap, LPG set at .030
Ford 800,900 (Gas & LP) .025 .027 FLY 5 deg BTDC 1-2-4-3 .015H .015H For spark, LPG set at 8 deg. For spark plug gap, LPG set at .030
Ford 801,901,1801,2030 (Gas & LP) .025 .027 FLY 4 deg BTDC 1-2-4-3 .015H .015H for spark, LPG set at 7 deg. For spark plug gap, LPG set at .030
Ford NAA,NAB .025 .027 FLY 8 deg BTDC 1-2-4-3 .015H .015H  
Ford 2N,8N,9N .015 .025 None TDC 1-2-4-3 .010-.012C .014-.016C  
Ford 4030, 4040 .025 .027 FLY 4 deg BTDC 1-2-4-3 .015H .015H  
Ford 6000 (Gas) .030 .025 FP 4 deg BTDC 1-5-3-6-2-4 .015H .015H  
Ford 2000,3000 (Gas) .025 .025 FLY 3 deg BTDC 1/2/03 .015H .018H  
Ford 4000 (Gas) .025 .025 FLY 3 deg BTDC 1/2/03 .015H .018H  
Ford 5000,7000 (Gas) .025 .025 FLY 2 deg BTDC 1-3-4-2 .015H .018H For all Fords listed here and above, set timing at 475 RPM
Farmall/IH Super M, MV, H, HV .020 .025 FP 1st Notch 1-3-4-2 .017H .017H  
Farmall/IH M, MV, H, HV .013 .025 FP 1st Notch 1-3-4-2 .017H .017H  
Farmall/IH Super A, AV, C .020 .025 FLY DC 1-4 1-3-4-2 .014H .014H  
Farmall/IH A, AV, B, BN, C .020 .025 FLY DC 1-4 1-3-4-2 .014H .014H For IHC magneto set points to .013, Wico magneto set to .015
Farmall/IH 154 Lo-Boy, Cub Lo-Boy, Farmall Cub .020 .023 FP TDC 1-3-4-2 .013C .013C For IHC magneto set points to .013, Wico magneto set to .015 - Int & Exh valve clearance for 154 Lo-Boy set to .015
Farmall/IH Cub Cadet, 70 & 100 .020 .025 FLY 2 deg ATDC 1 .006C .017C  
Massey-Ferguson TO-20, 30 .020 .025 FLY TDC 1-3-4-2 .014H .014H  
Massey-Ferguson MF 65,85,88,90 (Gas) .022 .026 FLY 5 deg BTDC 1-3-4-2 .016H .018H Spark for MF65 is 6 deg BTC
Massey-Ferguson MF 35, TO-35, MF-50, MH-50 .022 .025 FLY 5 deg BTDC 1-3-4-2 .013H .013H  
Massey-Ferguson MH Pacer(16), Pony .020 .025 FLY 4 deg BTDC 1-3-4-2 .012C .013C For spark, Pony set at paint line
Massey-Ferguson MH Colt(21), Mustang(23) .020 .025 FLY TDC 1-3-4-2 .014H .014H  
Minneapolis-Moline ZB .020 .025 FLY   1-3-4-2 .008H .010H For spark, 2-1/8" BDC (Gas & Distillate), 1-3/4" BDC (LP Gas)
Minneapolis-Moline ZA Series (Bat. Ign.) .020 .025 FLY 7 deg ATDC 1-3-4-2 .008H .010H  
Minneapolis-Moline ZA Series (Mag. Ign.) .020 .025 FLY 8 deg ATDC 1-3-4-2 .008H .010H  
Minneapolis-Moline V .020 .025 FLY DC 1-2-4-3 .006H .006H  
Minneapolis-Moline UB,UTS .022 .024 FLY   1-3-4-2 .008H .010H For spark, 3-7/8" BDC (Gas), 4-1/8" BDC (LP Gas & Distillate)
Minneapolis-Moline U Series (Bat. Ign.) .020 .025 FLY   1-3-4-2 .008H .010H For spark, 7 deg ATDC (H. Comp.), 5 deg ATDC (L. Comp.)
Minneapolis-Moline U Series (Mag. Ign.) .020 .025 FLY   1-3-4-2 .008H .010H For spark, 10 deg ATDC (H. Comp), 8 deg ATDC (L. Comp.)
Minneapolis-Moline U-302 (Gas & LPG) .022 .024 FLY DC-1 1-3-4-2 .010H .018H  
Minneapolis-Moline R Series .020 .025 FLY   1-3-4-2 .012H .014H For spark, 7 deg ATDC (L. Comp), 9 deg ATDC (H. Comp)
Minneapolis-Moline G-VI (LPG) .022 .015 FLY * * * 1-5-3-6-2-4 .008H .010H  
Minneapolis-Moline GTA,GTB,GTC Series (Bat. Ign.) .020 .025 FLY 5 deg ATDC 1-3-4-2 .008H .010H  
Minneapolis-Moline GTA,GTB (Mag. Ign.) .020 .025 FLY 8 deg ATDC 1-3-4-2 .008H .010H  
Minneapolis-Moline GT .020 .030 FLY   1-3-4-2 .012H .014H For spark, 11/16" after DC 1-4 mark (H. Comp)
Minneapolis-Moline GB .020 .025 FLY TDC 1-3-4-2 .008H .010H  
Minneapolis-Moline FT, FTA .020 .030 FLY C 1-4 1-3-4-2 .012H .014H  
Minneapolis-Moline BF .020 .025 FLY TDC 1-2-4-3 .006H .008H  
Oliver 60 .020 .025 FLY TDC 1-2-4-3 .010C .012C For points, with Magneto set .015
Oliver 70 .020 .025 FLY TDC 1-5-3-6-2-4 .011C .011C For points, with Magneto set .015

Legend
  • TDC - Top Dead Center
  • FP - Crankshaft Fan Drive Pulley
  • Exh - Exhaust
  • Int - Intake
  • ATDC - After Top Dead Center
  • BTDC - Before Top Dead Center
Data collected from an old Niehoff tune-up chart.

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