Trojan Boat Forum

i was looking for the post on prop size i read a wile back anyone want to help i have a 78 f36 and need new props 440ci 1:191 trans any suggestions

Try this one: The topic is 'Max RPM 2800". The detailed prop discussion for an F36 begins on page 4 of this thread.

http://www.trojanboats.net/wforum/viewt ... x+rpm+2800

20x20 is what most F36s are using some came with 20x21 (454 )

thanks guys but the post didnt tell me what i need to know i had 4 blades on there it performed real good but they came up missing and i do not know what they were pitched at i do know that they were 20" od and one was stamped 22P and other 20P i was going to have them scaned but i cant now so looking for sudjestions

The Factory 20x20 were 3 blade . Going to a 4 blade you would normally use less pitch . What rpm were you turning at wide open ?

4000 RPM 30mph on two diferent gps