unfastening set screws marine gearbox top

[bob46320]

get a screwdriver where the blade passes right through the screwdriver handle. Give the screws a good bash with a hammer on the end of the screwdriver whilst trying to do the screw up (ie clockwise). If you are lucky, they might just do up a wee bit. Now try the same but undoing. I think an impact screwdriver may be a bit too heavy a bit of kit, but you never know.

https://www.ebay.co.uk/itm/Pro-Impact-Sc...SwgmJXzSDA