The RPM information for the Minneapolis-Moline tractors is from the I&T service manual unless specified differently.
Engine models may be different.
* This is what someone told me and I do agree with their numbers.
Tractor Engine Engine Bore & Number Engine Model Model CID Stroke of CYL RPM's
RT pre 1951 EE 165 3 5/8 X 4 4 after 1951 EE 165 3 5/8 X 4 4 1650 no load 1400 loaded
ZT pre 1948 RE 186 3 5/8 X 4 1/2 4 1650 no load 1500 loaded after 1948 206 3 5/8 X 5 4 1650 no load 1500 loaded replacement 206B-4 engine 206E-4 206 3 5/8 X 5 4 My estimation same as RE & 206
ZA, gas & LPG 206B 206 3 5/8 X 5 4 1650 no load 1500 loaded
ZB Gas & LPG 206G-4 206 3 5/8 X 5 4 1650 high idle
UT 1946 & earler KEF 283 4 1/4 X 5 4 1400 no load 1275 loaded after 1946 gas & LPG 283A 283 4 1/4 X 5 4 1400 no load 1275 loaded
UB Gas, LPG 283B-4 283 4 1/4 X 5 4 1430 high Idle Diesel D283-4 283 4 1/4 X 5 4 1430 high Idle
UTS Special UB Special Gas, LPG, Diesel 283 4 1/4 X 5 4 1430 high Idle
GTA LE 403 4 5/8 X 6 4 1075
GTB & GTC Gas 403 4 5/8 X 6 4 1210 no load 1100 loaded LPG 340-4 340 4 1/2 X 6 4 1210 no load 1100 loaded
GB gas & LPG 403C-4 403 4 5/8 X 6 4 1430 high idle diesel 403 or 4 5/8 X 6 4 1430 high idle D425-6 425 4 1/4 X 5 6 1430 PTO and Belt work 1650 Other
G-VI & G 704 & MF 95 Gas & LPG 425 4 1/4 X 5 6 1650 high idle idle 475 Diesel 425 4 1/4 X 5 6 1625 high idle idle 600
G 705, G 706 G 707, G 708 MF 97 Gas & LPG 504 4 5/8 X 5 6 1720 high idle idle 600 Diesel 504 4 5/8 X 5 6 1710 high idle idle 600
335 165A 165 3 5/8 X 4 4 1650 high idle
445 gas, LPG 206H 206 3 5/8 X 5 4 1700 high idle diesel D206-4 206 3 5/8 X 5 4 1925 high idle
Jet Star Jet Star II Jet Star III Jet Star III Super 4 Star 4 Star Super Gas & LPG 206L-4 206 3 5/8 X 5 4 1900 high idle Diesel D206-4 206 3 5/8 X 5 4 1925 high idle
5 Star Gas & LPG 283 4 1/4 X 5 4 1650 no load 1500 loaded idle 450 Diesel 336 4 5/8 X 5 4 1550 no load 1400 loaded idle 600
U-302 & U-302 super Gas LPG 220 3 3/4 X 5 4 2100 high idle Diesel 236 3 7/8 X 5* 4
M5 & M504 M602 & M604 Das, LPG, 336 4 5/8 X 5 4 1650 no load 1500 loaded idle 450 Diesel 336 4 5/8 X 5 4 1650 no load 1500 loaded idle 600
M670 Gas, LPG, Diesel 336 4 5/8 X 5 4 1750 no load 1600 loaded idle 600
M670 super Gas & LPG 336 4 5/8 X 5 4 1825 no load 1600 loaded idle 600 Diesel 336 4 5/8 X 5 4 1750 no load 1600 loaded idle 600
G 900 Gas & LPG 425 4 1/4 X 5 6 2040 no load 1800 loaded idle 600 Diesel 451 4 3/8 X 5 6 1950 no load 1800 loaded idle 600
G 950 Gas & LPG 425 4 1/4 X 5 6 2040 no load 1800 loaded idle 600 Diesel 451 4 3/8 X 5 6 1950 no load 1800 loaded idle 600
G 955 Gas & LPG 425 4 1/4 X 5 6 My estimation same as G-950 LPG Diesel 451 4 3/8 X 5 6 My estimation same as G-950 Diesel
G 1000 Gas & Propane 504 4 5/8 X 5 6 2050 no load 1800 loaded idle 600 Diesel 504 4 5/8 X 5 6 1950 no load 1800 loaded idle 600
G 1000 Vista 504 4 5/8 X 5 6 Gas & LPG 504 4 5/8 X 5 6 2050 no load 1800 loaded idle 600 Diesel 504 4 5/8 X 5 6 1950 no load 1800 loaded idle 600
G 1050 Gas & LPG 504 4 5/8 X 5 6 2050 no load 1800 loaded idle 600 Diesel 504 4 5/8 X 5 6 1950 no load 1800 loaded idle 600
G 1350 LPG 504 4 5/8 X 5 6 2400 no load 2200 loaded idle 600 Diesel 585 4 3/4 X 5 1/2 6 2335 no load 2200 loaded idle 700 Engine Conversion LPG 800 5.319 X 6 6 My estimation same as G-1350 LPG
G 1355 LPG 504 4 5/8 X 5 6 My estimation same as G-1350 LPG Diesel 585 4 3/4 X 5 1/2 6 My estimation same as G-1350 Diesel
A4T-1400 LPG 425 4 1/4 X 5 6 My estimation same as G-950 LPG Diesel 504 4 5/8 X 5 6 My estimation same as G-950 Diesel
A4T-1600 LPG 504 4 5/8 X 5 6 My estimation same as G-1350 LPG Diesel 585 4 3/4 X 5 1/2 6 My estimation same as G-1350 Diesel Engine Conversion LPG 800 5.319 X 6 6 My estimation same as G-1350 LPG
The 800 engine conversion for the 1350 and A4T-1600 could be used on any of the later six cylinders MM tractors G-1000 and after. This engine has a different bellhousing than the well motor which will fit in the older six cylinder tractors G705 and older.
Tractor Engine Engine Bore & Number Engine Model Model CID Stroke of CYL RPM's
JT 196 3 5/8 X 4 3/4 4 1275 Rated
KT & KTA MT & MTA KEA 283 4 1/4 X 5 4 1275 MY estimation
21-32 382 4 1/2 X 6 4 1075 Rated
FT & FTA 403 4 5/8 X 6 4 1075 MY estimation