Re: 165 cylinder head
 

I have a 21 pitch on my I/O. But that does not mean it's right for you. Check the links page for info on proper prop sizing or search the old threads here. There's been plenty of conversation on this topic in the past

Re: 165 cylinder head
 

When my V20 was a I/o 165, I had a 15 X 15 1/4 worked like a dream!!

But its not going to be a speed queen by no means!! that 165 in my opion is under powered!!

I think its 120 HP at the prop. But it will get the job done!

Re: 165 cylinder head
 

My V-20's 165 1/O twists a 19" SS prop.