Saving Old Seagulls

Last year I bought my second British Seagull outboard through EBAY. (OK Twice burned shame on me!) It is a 1970 Model F "Featherweight". When received one of the four blades of the propeller was missing. Trying to deal with the damage I cut the oposite blade away and ground the stubs as close to the hub as possible. The outboard starts & runs fine but there is enough vibration to shake the carb. bowl loose. Fortunately, the outboard was running in a barrel. Replaced the the bowl & float & the outboard runs but with some vibration. With no previous experience there is some concern about whether I should try to reduce the vibration or buy another propeller.
1) would someone please outline a method of balancing a two blade propeller?
2) Would someone sell me a replacement propellor for a Model F "Featherweight."?

Thank You
Don

Think a new prop is the way to go to be honest, if you do get the prop balanced you will lose a lot of thrust on the modified prop and there will be a risk of over revving at full throttle as the modified prop will present approximately half the load on the motor. Two bladed props that are meant to be so will have larger blade areas and a coarser pitch.

Don't know what the shipping would be to the states but it could be worth giving John at SOS a ring if you can't get one in the states.

If you have to proceed with the balancing the only thing I can suggest is some kind of static balancer similar to :

http://www.frost.co.uk/item_Detail.asp? ... &subCatID=

No idea if one for wheels would be sensitive enough for a prop though