What Size Prop for Mitchell 31 MK1

[rich99uk]

Hi
I have recently Purchased a mitchell 31 mk1 which i have been doing up.
It didnt have a engine or any stern gear init when i got it, However thats all sorted now I Just need a prop but i have no idea what size to get?
The Boat is a mitchell 31 mk1
Engine is Ford Dover 2725E 130HP Fitted with heavy duty Fly wheel
Prm402D Gearbox 2:1
weighs About 4 Ton
Is there anyone that has the same boat that can tell me what size prop they have got?
Or has anyone got a cleaver way or working it out
Many Thanks
Rich

[CDK]

Google for propeller calculation, there is plenty on the web.
You must know the engine rpm that belongs to the 130 hp maximum power, take 2/3 of that as cruising rpm and divide by 2 to get prop rpm. The outcome will probably be approx. 1000 rpm or a bit less. Then select the prop that gives you hull speed at that point, so you get good economy and have some reserve for bad weather.