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Transmission Overheat

GAS engine, transmission and generator repair and maintenance discussion forum.
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Topic author United States of America
Asset Allocation
Scurvy Dog
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Posts: 9
Joined: March 9th, 2015, 1:14 pm
Vessel Info: 1999 356 Carver Aft Cabin Motor Yacht

Transmission Overheat

Postby Asset Allocation » July 26th, 2015, 12:59 pm

I have a '99 355 with Crusader 454's. It's been a little over a month since I took her out and both engines wouldn't go past 3200 RPM maintaining 18-19 mph WOT. She can usually go up to 29 mph WOT so figured the marine growth was causing the strain and hoped some of the growth would fall off and her speed would improve slightly... but never did. About 20 minutes into the trip the transmission oil overheat light came on the port engine thus the computer forced both engines to power down (but did not shut off). The light went out after the power down also. I put her in neutral then back in gear and putted all the way back to the marina at about 1200 RPM with no other warnings or issues. I didn't attempt to bring her up on plane again because I was just happy she was moving. Marine growth issue? Sensor issue? Any thoughts I can tell the mechanic to check into? Thanks everyone!

Brent
"Asset (Re)Allocation"
:captain:


Canada
Viper
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Vessel Info: 1989 Carver 3807
Location: Ontario, Canada
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Re: Transmission Overheat

Postby Viper » July 26th, 2015, 8:05 pm

Check that the tranny fluid is in good shape and topped up. You may have a clogged tranny oil cooler. Do the engine temps remain normal during the fault?
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Topic author United States of America
Asset Allocation
Scurvy Dog
Scurvy Dog
Posts: 9
Joined: March 9th, 2015, 1:14 pm
Vessel Info: 1999 356 Carver Aft Cabin Motor Yacht

Re: Transmission Overheat

Postby Asset Allocation » July 30th, 2015, 8:17 am

++Update++
I had the bottom cleaned clearing all intakes, props and rudder. That did the trick! The bottom was pretty good but the running gear and intakes had sea grapes and gunk stuck on it. After a good cleaning she runs like a top....now.
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Topic author United States of America
Asset Allocation
Scurvy Dog
Scurvy Dog
Posts: 9
Joined: March 9th, 2015, 1:14 pm
Vessel Info: 1999 356 Carver Aft Cabin Motor Yacht

Re: Transmission Overheat

Postby Asset Allocation » July 30th, 2015, 8:20 am

To answer the engine temp question yes, they remained in normal temp status...that part is amazing considering the marine growth on the intakes.
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Topic author United States of America
Asset Allocation
Scurvy Dog
Scurvy Dog
Posts: 9
Joined: March 9th, 2015, 1:14 pm
Vessel Info: 1999 356 Carver Aft Cabin Motor Yacht

Re: Transmission Overheat

Postby Asset Allocation » July 30th, 2015, 8:21 am

Also if anyone was wondering...my location is Portsmouth, Virginia off of the Elizabeth river. Other boaters have a diver who clean their hulls supposedly on a monthly basis so I guess the marine growth is that bad.
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waybomb
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Vessel Info: 1987 3697 Carver Mariner
1988 Cougar 46 Kevlar Vee offshore
1969 15' Glaspar / 1969 Johnson Electrmatic 85
1964 Barron Flat bottom drag boat
A couple of dinghies
Location: Saint Joseph and Trenton, MI
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Re: Transmission Overheat

Postby waybomb » July 30th, 2015, 12:13 pm

Wow, that's something.
We kept our boat in Ventura, CA for 3 years. Paid a diver monthly to clean the bottom and change out zincs whenever needed. It was worth the peace of mind if nothing else.
Thanks
Fred
1964 Barron Flatbottom with BBC Chevy
1969 Glaspar Avalon /1969 Johnson Electromatic 85
1987 Carver Mariner
1988 Cougar Kevlar 46' with triple blown 572s
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Past - 1988 2807, 1989 4207 Aft

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