RR/Allison 250 mechs?

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Member for

18 years 11 months

Posts: 4,796

Friends bike with the RR/A 250, says the smoke is from diesel burning off due to a leaking tank sender unit. Looking at the left side when it fires up I have doubts with that diagnosis.... What's the part on the left that's spewing smoke?

https://www.youtube.com/watch?feature=player_embedded&v=I1ZFHzAKxZw

Original post

Member for

19 years 1 month

Posts: 2,106

Looks like the labyrinth seal has gone to me , quite common on the A250.