If you send us the engine number, which you will find on the bottom of the crankcase, just above the top of the drive shaft tube, we will all know exactly what your talking about. ( will need complete number)
Interesting number this was an engine built during the days of confusion at Seagull.
Very few QB's were numbered without a date code but all the ones I've seen were grey QB's.
This one has a twist grip throttle but no T on the serial number.
Remote fuel system.
Needle roller crankshaft.
Strange paint colour differences flywheel cover/crankcase.
But everything looks spot on otherwise.
I would bet 50p Biff is from Dorset or his Father was.
This looks like a staff motor built by some one who was or knew the recipiant/customer & as such, it might not have gone through the 20 minute test tank cycle to see if it passed all of Seagull's quality controls criteria.
A extremely clean & well finished, desirable Seagull, that as long as there is no signs of 15 years poor storage in the big end area would make a welcome addition to any serious collector's display.
I coughed at first when I saw the price, but on reflection realised that there is no way you could build one with all new parts, if you could get them, for this little!
Got any more Biff, you haven't got a new 5R have you?
This post is a little old now but wondering if it ever sold. Agree with The two charles's, bet it was a 'liberated' motor, as a result of parts walking out the gate!
Could be converted to the reliable plain bearings, to make it a usable motor. Roller bearings were a disaster for the Kingfisher.