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kohouty

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hey guys i have a 1973 v20 love it.
it has the 165 inline 6 whats the best prop to run on it.
i have a 17 on it now thats what it came with.
its a slow go getting out but trolls nice.
was thinking about going with a 19 pitch and getting a troll plant.
any help would be great

thx
kohouty
 
I run a 15 x 17 on my 150 but the first question that you might need to answer is:

What RPM are you at when you are at top speed?

From what I have read it is hard to know what prop to use unless you know what your engine needs to run smoothly.

Almost forgot -- Welcome aboard. The guys around here can answer many of the quesions that you might have.
 
thx for the info
right now i can take the rpms up to 6grand, way to hi the engine is raded at 4700 max rpm, it trolls nice just would love to get out fast with out losing my troll speed.

nice pick of your boat. i also have a 78 v20 with a 350 265hp i am restoring it going to be a few years before she done..

thx
kohouty
 
If you're revvin' to 6Gs then it's definately the wrong prop...somebody w/more I/O experience will be along soon to steer ya on that

wish I could tell ya more about what prop...but generally to improve one end of the performance grade, you gotta give up a little on the other end..good luck w/it either way and keep us posted on what ya do w/the '78...sounds like a HOSS!!...

Pictures if ya can...:pic:
 
here are a few pic of my 78 v20 project
 

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Nice man cave! You should have put "Caution: Naked V20" in your post. LOL!!

Looks like a great project you have going! A lot of people on here wouldn't mind following your progress on the restore - me included.
 
kohouty said:
thx for the info
right now i can take the rpms up to 6grand, way to hi the engine is raded at 4700 max rpm, it trolls nice just would love to get out fast with out losing my troll speed.

nice pick of your boat. i also have a 78 v20 with a 350 265hp i am restoring it going to be a few years before she done..

thx
kohouty
Click to expand...

Sounds to me like you would need atleast a 19, maybe even a 21. I hate to say it but you may never really know until you try one out. You can sit here all day reading about it but until you get one on the boat you'll never really know.

Maybe you can find someone who is willing to loan you their's so you can see what a 19 or 21 will do for you.

Good luck.
 
hey guys put a 19 pich prop on that i had. and changed my tac.
slow troll is 1.2 sweet.
now she goes 32mph at 3/4 throttel sweet and rpms full throttel is 3100
the 165 max rpm is 4700
now that i change the tac i am going to try the 17 pitch prop again.
thx for the help guys
kohouty
 
When I had my 165 IO I use to run a 15 x 151/2 great out of the hole, but little less on the top end. But I use to carry a lot of weight.

Good Luck!
 
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