MAMOD FLYWHEEL + SPACER SP3 / MEC1 / WS1
MECCANO, SP3 ENGINE, AND WS1 WORKSHOP LINE SHAFT PULLEY.
This is the best we can do to provide you with a new flywheel.
FLYWHEEL DIMENSIONS: OD 1.89 INS/ ID 0.185 INS
Please note that the Meccano and the Mamod SP3 engines have a crankshaft axle width which is 0.156 ins or 3.90mm. You will not have to overcome the problem of this flywheel's internal diameter being marginally too large because you will get also an i.d. spacer that takes up the slack well enough.