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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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