MAMOD CYLINDER/ PISTON DIMENSIONS IN INCHES and MMs.
This is what we found but your dimensions could be different.
Engine | End to | Port to | Piston |
Type | port | trunion | Rod |
SE1 & 1A |
|
0.500 ins 12.70mm & 15.27mm |
2.50 - 2.60 - 2.70 ins 63.5 to 68.58mm |
SE2 (1948) |
0.158ins 4.01mm
|
0.3125ins 7.29mm |
|
SE2 (1954 |
0.138ins 3.50mm |
0.500ins 12.70mm & 15.27mm |
2.50 - 2.60 - 2.70ins 63.5 to 68.58mm |
SE2A (1970) |
0.148ins 3.76mm |
0.375ins 9.53mm |
2.50 - 2.60 - 2.70ins 63.50 to 68.58mm |
SE3 |
0.177ins 4.50mm |
0.500ins 12.70mm & 15.27mm |
2.50 - 2.60 - 2.70ins 63.50 to 68.58mm |
MM1 |
0.210ins 5.33mm |
0.385ins 9.78mm |
1.224ins 31.09mm |
MM2 |
0.138ins 3.50mm |
0.382ins 9.70mm |
1.673ins 42.49mm |
SP4/5 |
0.130ins 3.30mm |
0.610ins 15.27mm |
2.510ins 63.75mm |
CURRENT STANDARD |
0.138ins 3.50mm |
0.382ins 9.70mm |
1.673ins 42.49mm |
Crank hole centre to piston proper. | |||
Steam inlet to tunnion (centres) | |||
End of cylinder to steam hole |
We have found that there is no "standard" for SE engine pistons.
So, we have written down the range of lengths found, from
crank hole to the piston proper and not including the
piston. In other words from the cylinder to the crankshaft pin
when fully extended.
We have found that the piston diameter ranges from 0.311 to
0.315 with the upper size causing a problem in matching to a
cylinder.
If you want further clarification please call Trevor on 01273 493624.