Hi all Thanks for your help and comments but my problem is that the engine once on its wheels will not turn at all unless I use a spanner on the cranks to turn it over. With this it will move but not run. Cheers Ken Send instant messages to your online friends http://uk.messenger.yahoo.com MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.