Like I said - I know nothing about the vehicle - it is merely stored here, but I will run it up again, and check the detail
On start up there is no knock anywhere - you'd buy it!
After a few minutes I ran it up and the knock kicked in, engine went out of beat and tried to jump off its mounts - never looked at the exhaust as we were shutting it down.
The knock was sharp, metallic, not heavy enough for a big end, but heavy enough to make you sit up and take notice - and once in play did not stop on returning to tick over
On shut down a nasty curl of smoke came out of the breather
Will have another play!
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