I need parts for a Mercury Thunderbolt 200 marine engine. serial no. 3542084. 20 HP. Standard shaft.please.?
Namely the bottom leg with gearbox & waterpump. ( three studs through waterpump, to identify) Any ideas would be welcome.
go to www.anythingmarine.com
he has parts from Noahs Ark! If thats no good go to a Merc dealer. many of the V-6 lower units are inter changeable, you should have no problem getting a lower unit.

Try this site,
http://www.boatsandoutboards.co.uk/category/Engines/Engines+-+Spares
You have nothing to lose, good luck.
References :
go to http://www.anythingmarine.com
he has parts from Noahs Ark! If thats no good go to a Merc dealer. many of the V-6 lower units are inter changeable, you should have no problem getting a lower unit.
References :
you could check out http://www.outboardrepairs.com/mercury/
References :