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Tune-Up Specifications - Minneapolis-Moline

This data has been gathered from old out-of-print material. While we make every effort to be accurate, the information shown is to be used for general reference only. It is always best to have the original service or operator's manual for your tractor before attempting any tuneup.

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

Model Point Gap Spark Plug Gap Timing Mark On Spark Occurs Firing Order Int. Valve Clearance Exh. Valve Clearance Comments
ZB .020 .025 FLY   1-3-4-2 .008H .010H For spark, 2-1/8" BDC (Gas & Distillate), 1-3/4" BDC (LP Gas)
ZA Series (Bat. Ign.) .020 .025 FLY 7 deg ATDC 1-3-4-2 .008H .010H  
ZA Series (Mag. Ign.) .020 .025 FLY 8 deg ATDC 1-3-4-2 .008H .010H  
V .020 .025 FLY DC 1-2-4-3 .006H .006H  
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)
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.)
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.)
U-302 (Gas & LPG) .022 .024 FLY DC-1 1-3-4-2 .010H .018H  
R Series .020 .025 FLY   1-3-4-2 .012H .014H For spark, 7 deg ATDC (L. Comp), 9 deg ATDC (H. Comp)
G-VI (LPG) .022 .015 FLY * * * 1-5-3-6-2-4 .008H .010H  
GTA,GTB,GTC Series (Bat. Ign.) .020 .025 FLY 5 deg ATDC 1-3-4-2 .008H .010H  
GTA,GTB (Mag. Ign.) .020 .025 FLY 8 deg ATDC 1-3-4-2 .008H .010H  
GT .020 .030 FLY   1-3-4-2 .012H .014H For spark, 11/16" after DC 1-4 mark (H. Comp)
GB .020 .025 FLY TDC 1-3-4-2 .008H .010H  
FT, FTA .020 .030 FLY C 1-4 1-3-4-2 .012H .014H  
BF .020 .025 FLY TDC 1-2-4-3 .006H .008H  

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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