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Clicking Noise with small vibration in outdrive

M

mr_c

New member
"I have recently purchased a 2

"I have recently purchased a 2001 240 Sundeck Sea Ray with a Merc 350 Mag MPI. The outdrive (OD) is a Bravo Three w/ Twin Prop, 2.00 ratio. It has been used in salt water but I am in fresh water. I have also changed the anodes to Aluminum from zinc.

The OD is making a clicking sound when under power (moving)with a small vibration at low rpm and speed. The clicking sound does not seam to increase or decrease with movement from left to right of the OD.

With the help of this message board, I removed the OD, and inspected the gimble bearings and the U-Joints. The gimble bearing rotates smoothly with out any noise or gritty feel with out any play. The U-Joints appear to be almost new and have the greasable fittings. The U-Joints do not have any play either. When idling, no clicking sound. Reving the engine does not make any noises or vibration. The engine runs great. I have greased the gimble bearing and the fitting behind the motor (ujoint shaft area).

There is a swim platform so I cannot see the OD when in motion.

How do I evaluate the upper or lower unit for this clicking sound? Also, what is the torque spec for the 6 bolt that hold the outdrive on the transom assembly?

Thanks for your help,"
 
"Did you pull the props and ch

"Did you pull the props and check for debris on the shaft; fishing line, etc. Are the props perfect or a few dings which can affect the balance and cavitation."
 
"The props are in excellent co

"The props are in excellent condition. I will check for fishing line on the prop shaft. I will keep you posted.

Thanks,"
 
"put the drive down and pull t

"put the drive down and pull the lower oil plug on the drive and check the oil colors, if clear comes out first, that's water. If' its milky you have water in it, if its yellow or greenish, the oil's good."
 
"Thanks Brian,
The oil has be

"Thanks Brian,
The oil has been changed in the OD and did not have water. Some metal shavings were on the magnetized plug.

I have not been able to remove the props at this time."
 
"It is important to pull the P

"It is important to pull the Props and Grease the Splines with Mercruiser Spline Grease. I also have a B-III and have installed a Drive Shower which Cools the Upper Gear Case. Google, "Drive Shower" for research. Al W."
 
"Barry. Not sure about the noi

"Barry. Not sure about the noise that you describe , but why did you exchange the anodes to aluminum? A lot of your outdrive (the entire casing)is aluminum, and your (zinc) anodes being the "less noble" of the 2 metals, will be sacrificed to electrolysis before any aluminum motor parts. If both are the same material, I'd think that you've defeated that purpose.
If you don't believe that there is electrolysis present, just connect a voltmeter to a downrigger cable. There is always between .5 and 1.0 volts flowing down the cable."
 
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