w3bby any ideas where i can get one for my strimmer engine? what size etc ?do i just take it to the car shop and get one of same size etc but resister type?.im starting my boat in a cpl of weeks just need to source the marine or birch ply .i got a prather s280 prop for the engine i did order a 275 but they were out so i got the 280 instead,Dave marles recomended a 482 octura prop so i think 280 prather should be same as the one he recomended.its 80 mm at any rate.might need to drop to a 275 when i get this thing modded hehe ::).