PISTON SIZES

MAMOD CYLINDER/ PISTON DIMENSIONS IN INCHES

 

Engine End to  Port to Piston 
Type port trunion Rod
       

SE1 & 1A

 

0.500

2.50 - 2.60 - 2.70

SE2 (1948) 0.158

0.3125

 

 

SE2 (1954 0.138

0.500

2.50 - 2.60 - 2.70

SE2A (1970) 0.148

0.375

2.50 - 2.60 - 2.70

SE3 0.177

0.500

2.50 - 2.60 - 2.70

MM1 0.210

0.385

1.224
MM2 0.138

0.382

1.673
SP4/5 0.130 0.610 2.510
CURRENT STANDARD 0.138 0.382 1.673
       
         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 crank shaft 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.