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TOPIC: Hey OMC Cobra guys! Look at this drive, and tell me what you see...

Hey OMC Cobra guys! Look at this drive, and tell me what you see... 10 Feb 2010 15:23 #26

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bwmarine;417261 wrote: from what I remember without looking... the ram can not touch this area if plastic shims at rear anchor pin or the plastic wear plates are missing.
this drive has been repainted and is loosing paint.. poor prep job?
important parts is does it shift... hold a gear... and hold pressure(no leaks)

for myself I do like these drives... holds twice the amount of fluid as a mc1, requires less lube changes tahn the mc1 because of the more volume of lube. and they hang in there quite well...

the only problem with these drives is improper filling. this is the only drive that requires filling from the middle not from the bottom of the drive. if filled from the bottom it will leave an air void taht will adventually amke it to the upper gearcase and will run the upper dry of lube.


This drive has not been repainted, at least I don't think it has.

Note the tape stripe at the junction of the lower and upper units.

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Matt Train
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Hey OMC Cobra guys! Look at this drive, and tell me what you see... 10 Feb 2010 15:27 #27

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dmcb;417288 wrote: Hey Matt, what happened to that new boat you were absolutely going to buy a couple months ago? Loan was approved and all. Or, or, or. :)
Doug


This started out as a backup plan, and is slowly becoming the primary plan, primarilly because this will not require a loan to acquire. That seems like a smarter move to me in this economy.

It will kill me to pass on that other boat. :(

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Hey OMC Cobra guys! Look at this drive, and tell me what you see... 10 Feb 2010 15:32 #28

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from the cavitation plate down looks to be painted... looks alot like what i have seen with bad paint prep and paint starts coming off...

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Hey OMC Cobra guys! Look at this drive, and tell me what you see... 10 Feb 2010 15:37 #29

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biohazard;417226 wrote: matt wut r you going to look at?

Can u post a pic or 2 of the boat for us?


Here's a hint.

Attached files

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Matt Train
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Hey OMC Cobra guys! Look at this drive, and tell me what you see... 10 Feb 2010 15:38 #30

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bwmarine;417343 wrote: from the cavitation plate down looks to be painted... looks alot like what i have seen with bad paint prep and paint starts coming off...



I have a repair receipt from 2002 showing "Skeg Repair, weld, sand, primer and paint."

That would explain the lower unit repaint. Upper drive, I think, is original.

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Hey OMC Cobra guys! Look at this drive, and tell me what you see... 10 Feb 2010 16:06 #31

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Matt, I'd think that a likihood of the drive walking sideways is slim.
There would be other tell tale signs, I believe.

Is it possible that the PO had some type of non-conventional trim cylinder protective covers that were left in place while towing?
Is the Stbd side the same?

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Hey OMC Cobra guys! Look at this drive, and tell me what you see... 10 Feb 2010 16:42 #32

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Click on the picture. This guy has new ones in the box.

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Skål,
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Hey OMC Cobra guys! Look at this drive, and tell me what you see... 10 Feb 2010 16:49 #33

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2850Bounty;417363 wrote:
Is it possible that the PO had some type of non-conventional trim cylinder protective covers that were left in place while towing?
Is the Stbd side the same?


Very possible, based on the canvas, SS prop, and other telltales that the boat was cared for.

I don't have a pic of the other side of the OD, I will ask for it.

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Hey OMC Cobra guys! Look at this drive, and tell me what you see... 10 Feb 2010 19:20 #34

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Looks to be in good shape. You know any Cobra drive leg must - certainly should - have been unbolted more than once in the at least 21 years it's been on that boat. Replacement of the u-joint bellows, shift cable (a good cable can stretch in that long a time) would be two routine maintenance reasons to pull the leg.

The side of the upper blemish just looks like salt water corrosion starting from some kind of chip or scrape. No big deal. In short, the drive looks externally okay for its age. Internals? Check for excessive fore-aft play on the propshaft, check for any drive leg oil leaks. If the drive shifts and runs smoothly most likely it's fine.

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Hey OMC Cobra guys! Look at this drive, and tell me what you see... 10 Feb 2010 20:19 #35

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MikeValent;417443 wrote: Looks to be in good shape. You know any Cobra drive leg must - certainly should - have been unbolted more than once in the at least 21 years it's been on that boat. Replacement of the u-joint bellows, shift cable (a good cable can stretch in that long a time) would be two routine maintenance reasons to pull the leg.

The side of the upper blemish just looks like salt water corrosion starting from some kind of chip or scrape. No big deal. In short, the drive looks externally okay for its age. Internals? Check for excessive fore-aft play on the propshaft, check for any drive leg oil leaks. If the drive shifts and runs smoothly most likely it's fine.


This is a freshwater boat, and has been its entire life.

But thanks for weighing in. I appreciate it. :)

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Matt Train
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