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  best prop for vintage 1988 Johnson OR 18

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Author Topic:   best prop for vintage 1988 Johnson OR 18
johnwedwardsjr posted 07-14-2003 11:58 PM ET (US)   Profile for johnwedwardsjr   Send Email to johnwedwardsjr  
I have a 1987 18 ft Outrage with the vintage Johnson 120 HP commercial engine. What is the best all around prop for maximun speed? Thanks in advance for your advice.
UnderDog posted 07-15-2003 01:33 AM ET (US)     Profile for UnderDog  Send Email to UnderDog     
Hello John, I can understand wanting to go fast,but what we need to know are a few more details. here is a list of info we need.

1. what is your top speed now?
2. what prop you have now?(size/ stainless or alum)
3. what is RPM's you are getting with your current prop at WOT?(wide open throttle)
4. what is your motors WOT top RPM's per spec?
5. what is the distance from the cavatation plate to the bottom of the boat? (the motor should be at least 3/4 higher than the bottom of the boat.)
6. what will you be using the boat for? ( fishing or skiing ) honest this does matter
7 how much weight do you have on your boat most of the time? (number of people plus gear plus gas)

Come back with this info, and we will give you our best answers to help you in your quest.

good luck


johnwedwardsjr posted 07-16-2003 06:59 AM ET (US)     Profile for johnwedwardsjr  Send Email to johnwedwardsjr     
Keith, The boat is currently in the shop having the carbs rebuilt and I do not have the details you requested. I will use the boat primary for fishing but will occassionally pull my kids sking. They all weigh less than 125 lbs so power is less important to me than speed. Once the boat is out of the shop, I will get back with you with additional details. Thanks for your assistance.

Do you know a good prop for me to start with? The one on the boat is in bad condition.

UnderDog posted 07-16-2003 01:28 PM ET (US)     Profile for UnderDog  Send Email to UnderDog     
Hello John, I would suggest if your prop worked nicely when it was new, start there. we can make changes depending on preformance. either borrow one the same size and pitch, maybe from your mechanic, or a local outboard shop or having the one you own now, fixed(would always make a nice backup prop.

once we get all the info we can make changes to your setup as needed.


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