need help with prop choice

P

phanright

Recruit
Joined
Jan 25, 2009
Messages
3
hello i have a 17 ft caravelle with a merc 165 inboard mostly used to pull tubes . i live in colorado and use the boat at an elavation of about 9000 ft above sea level . what would the ideal prop be for my situation and also what should i set points and spark plug gapp at for this elavation? any help would be great i am new to boating and dont have a clue
thank you
paul the newbie
 
Barnacle_Bill

Barnacle_Bill

Admiral
Joined
Feb 8, 2004
Messages
6,469
Re: need help with prop choice

I believe your points and plug settings remain the same. However you might check your manual and see what is recommended for carb jets at that altitude. After you know those are right we need to know your RPMs at WOT and what size prop you are running now.
 
Silvertip

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,762
Re: need help with prop choice

At the very top of this forum is a "sticky" titled "Read This First". Do that and after you get to 9000 feet and run the boat, provide us with the data you gathered as directed in the Sticky. You will have to change jets for the altitude. Timing and points gap does not change.
 
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