Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Hi Trevor,

Glad you bit the bullet, hope you find the cause.

The score marks are on the outside of the needle bearing case?  are they lines across the bearing or lines around the bearing?  I ask because those bearing cases are usually hardened steel so it would take quite a pinch from and aluminium crankcase to mark them, however if the score marks run around the bearing it may indicate they seized and turned in the cranckcase.

Not trying to insult your intellengence here, i'm just really curious and interested to find the issue you have :-)

I probably have a couple of  bearings and can send you some hard grub screws if you PM me your address

Kind regards
Aded