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Old 10-14-2018, 05:32 PM
ztarum ztarum is offline
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Boat: 2002 Prostar 197 6.0L
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Stock prop for 2002 197 6.0L (non-powerslot)?

Anyone know what prop I should have? The current prop is a 4 blade stainless that appears to be stamped OJ 202. The boat is quite fast, but it seems like I am getting prop slip or cavitation at high speeds (approaching ~50 mph). It happens suddenly and then stops when I pull back on the throttle. No issues with full power hole shots or typical speeds. It only happens at high speed and full throttle. The boat was lightly loaded at the time.

The boat is new to me, and this was my first time out on smooth water.
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  #2  
Old 10-15-2018, 08:24 AM
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EJ OJPROP EJ OJPROP is offline
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The 2 02 is the month and year the prop was made. The size will be marked on the face of the hub behind the prop nut.
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Old 10-15-2018, 10:41 AM
ztarum ztarum is offline
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Boat: 2002 Prostar 197 6.0L
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Thanks. I'll check that out when I get back to my boat in the spring.

Does the other symptom I'm describing make any sense? I would normally think cavitation would be a problem taking off, not at the top end.

The other item worth mentioning is that my boat is a 2002, so there is no "hook" at the end of the hull. I believe these boats came with a winged rudder, but mine is just a blade (no wings), so maybe that is a factor. There was no noticeable porpoising or other odd behavior at the time, but its almost like the prop came out of the water.

I guess it's possible that I was hitting the rev limiter. I know what it's like in a car, but never experienced it in a boat. It was pretty loud and scared me enough that I immediately cut throttle, so I didn't see if it was "bouncing" off the limiter.

Last edited by ztarum; 10-15-2018 at 11:08 AM.
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  #4  
Old 10-16-2018, 08:05 AM
Burdhntr Burdhntr is offline
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Don’t worry! I have the same boat and motor, and it does that as well. It IS the rev limiter. Freaks people out when they pull you barefoot and just “mash it”. Alls well.
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  #5  
Old 10-16-2018, 08:22 AM
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Ok, I have this engine in my 08’. I do not run a 4 blade per recommendation of Acme. I do run a 3 blade Acme (model # = I forget). My boat at WOT will push 51-52mph so fast for a ski boat. Exceleration is spot on no slip at all.

At WOT (mind you, this doesn’t happen often or for long period of times) I have never ever had a reaction like your discription.

Just two weeks ago I did this because of the other 197 post about chopping the throttle at speed and the nose goes under. I was thinking to myself “What the heck, no way”. My suspicions were right. Chopped the throttle at high speed “nothing happened”. Boat came to rest nicely at idle as always. If I did this and the nose went under I probably would have swam home and left the boat to sink. What boat does that? Lol.

Sorry to get off topic. If you want me to get a prop part number I can within 24hrs. Good luck sound to me that there maybe a transmiton issue? Have you check your fluids?


Quote:
Originally Posted by ztarum View Post
Thanks. I'll check that out when I get back to my boat in the spring.

Does the other symptom I'm describing make any sense? I would normally think cavitation would be a problem taking off, not at the top end.

The other item worth mentioning is that my boat is a 2002, so there is no "hook" at the end of the hull. I believe these boats came with a winged rudder, but mine is just a blade (no wings), so maybe that is a factor. There was no noticeable porpoising or other odd behavior at the time, but its almost like the prop came out of the water.

I guess it's possible that I was hitting the rev limiter. I know what it's like in a car, but never experienced it in a boat. It was pretty loud and scared me enough that I immediately cut throttle, so I didn't see if it was "bouncing" off the limiter.
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  #6  
Old 10-16-2018, 09:23 AM
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I was doing some research in case I wanted to reprop my 'new to me" 08 X14 w/ the LY6 and 1.22 tranny, and Acme said the 3 blade 1281. Another thread on here said the same thing..
https://www.mastercraft.com/teamtalk...754#post613754
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  #7  
Old 10-16-2018, 10:06 AM
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I have this engine and tranny ratio. I will tell you what I have for Acme model #. I love my prop. Made such a huge difference.

Hang tight.


Quote:
Originally Posted by Double D View Post
I was doing some research in case I wanted to reprop my 'new to me" 08 X14 w/ the LY6 and 1.22 tranny, and Acme said the 3 blade 1281. Another thread on here said the same thing..
https://www.mastercraft.com/teamtalk...754#post613754
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  #8  
Old 10-16-2018, 11:40 AM
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Acme 1279 (13.5 X 15.5) 3 blade.
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Old 10-16-2018, 01:38 PM
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Double D Double D is offline
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Quote:
Originally Posted by Covi View Post
Acme 1279 (13.5 X 15.5) 3 blade.
Interesting... What is your top speed?

The 1281 is 3 Blade 13.25" x 15"
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  #10  
Old 10-16-2018, 04:35 PM
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Covi Covi is offline
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50-51 wot, glass.

Quote:
Originally Posted by Double D View Post
Interesting... What is your top speed?

The 1281 is 3 Blade 13.25" x 15"
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