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  #1  
Old 08-09-2013, 03:07 PM
mondos829 mondos829 is offline
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Drive Slipping High RPM

Boat is a 76 SS. My RPM's are very high when throttle is opened all the way, like 6000 rpm. Could the drive be slipping? Drive oil is topped off and does not smell burnt.

Would prop damage cause power loss and high rpm?

Would anything else cause this issue?
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  #2  
Old 08-09-2013, 08:10 PM
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93Prostar190 93Prostar190 is offline
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Wrong prop? Or prop slipping on shaft?
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Old 08-09-2013, 11:47 PM
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Have you recently changed props? If not, I would remove trans lube and install fresh stuff and see if there is a change.
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  #4  
Old 08-10-2013, 11:35 PM
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It occurs to me that the tach could be reading wrong as well. Probably would be good to verify its accuracy.
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Old 08-11-2013, 12:26 AM
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Quote:
Originally Posted by mondos829 View Post
Boat is a 76 SS. My RPM's are very high when throttle is opened all the way, like 6000 rpm. Could the drive be slipping? Drive oil is topped off and does not smell burnt.

Would prop damage cause power loss and high rpm?

Would anything else cause this issue?
Yes, is your prop damaged?
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  #6  
Old 08-11-2013, 06:49 PM
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Quote:
Originally Posted by thatsmrmastercraft View Post
Yes, is your prop damaged?
Lol I'd like to see the type of damage that would result in an overrev like that! On a side not it amazes me how many damaged props I see, and people are running them as if nothing is wrong with doing that.
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  #7  
Old 08-11-2013, 06:50 PM
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Quote:
Originally Posted by strad View Post
Lol I'd like to see the type of damage that would result in an overrev like that! On a side not it amazes me how many damaged props I see, and people are running them as if nothing is wrong with doing that.
^^^^ I know right??? ripped up props and chewed up skegs... mostly on IO's.... I bet many a Tahoe dies this way....
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Old 08-11-2013, 07:11 PM
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Quote:
Originally Posted by strad View Post
Lol I'd like to see the type of damage that would result in an overrev like that! On a side not it amazes me how many damaged props I see, and people are running them as if nothing is wrong with doing that.
If blades are torn up enough, and you ignore the vibration, it doesn't take a lot of cavitation to over-rev.
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  #9  
Old 08-12-2013, 08:48 AM
mondos829 mondos829 is offline
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Ended up being a exhaust leak. Everything is back to normal with RPM's
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  #10  
Old 08-12-2013, 09:34 AM
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thatsmrmastercraft thatsmrmastercraft is online now
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Quote:
Originally Posted by mondos829 View Post
Ended up being a exhaust leak. Everything is back to normal with RPM's
Interesting source. Good to hear issue is resolved. Exhaust manifold gasket replacement?
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Tandem Axle Wheel & Tire Package $659
4 S5 or S5 Black 14x5.5 wheels, 4 ST205/75R14 Kenda Loadstar tires

Single Axle Wheel & Tire Package $399
2 S5 or S5 Black 14x5.5 wheels, 2 ST205/75R14 Kenda Loadstar tires
MOUNT, BALANCE & FREE SHIPPING INCLUDED IN BOTH PACKAGES



CARB REBUILDING - FAST TURN-AROUND - $125 +PARTS
LED lights, Hubs, Spare Tire Carriers, Chrome & Powder Coated Lug Nuts - Red, Blue & Black


PM or email me tiresplease@gmail.com
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