MTD 65 Series - Engine Specifications Chart

Crankshaft, piston and connecting rod
121
Engine specifications chart
New Min New Max Service Limit
Inch Metric Inch Metric Inch Metric
Displacement
P61 122.7 cc (7.5^3)
P65 139.4 cc(8.5^3)
X65 159.3 cc (9.7^3)
P70 173.2 cc (10.6^ 3)
Bore (new)
P61 2.402 61.015 2.403 61.025 2.409 61.182
P65 2.559 65.005 2.560 65.015 2.567 65.193
X65 2.559 65.005 2.560 65.015 2.566 65.183
P70 2.756 70.000 2.756 70.015 2.764 70.196
Bore out of round
P61 0.000 0.000 0.000 0.005 0.000 0.005
P65 0.000 0.000 0.000 0.005 0.000 0.005
X65 0.000 0.000 0.000 0.005 0.000 0.005
P70 0.000 0.000 0.000 0.005 0.000 0.005
Cylinder taper
P61 0.000 0.000 0.000 0.005 0.000 0.005
P65 0.000 0.000 0.000 0.005 0.000 0.005
X65 0.000 0.000 0.000 0.005 0.000 0.005
P70 0.000 0.000 0.000 0.005 0.000 0.005
Crank journal (flywheel
end) diameter
P61 0.984 24.982 0.984 24.993 0.979 24.864
P65 0.984 24.982 0.984 24.993 0.979 24.864
X65 0.984 24.982 0.984 24.993 0.979 24.872
P70 0.983 24.975 0.984 24.989 0.979 24.868
Crank journal (PTO end)
diameter
P61 0.983 24.970 0.984 24.985 0.979 24.864