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Just a rant.
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| Tom W Clark |
Posted on 06/02/11 - 9:24 PM
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Changing the gear case oil and changing the water pump impeller have nothing to do with one another. The assertion that one must be done with the other is rather bizarre.
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| John Fyke |
Posted on 06/02/11 - 9:39 PM
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How the heck do you drop the lower unit and not drain and replace the oil. Is that what you do with your vehicles as well?
Edited by Tom W Clark on 06/02/11 - 9:45 PM
John Fyke
Re-Fit or Reef It
1979 15' Sport with Super Sport conversion and 70hp mercury. |
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| Tom W Clark |
Posted on 06/02/11 - 9:46 PM
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John -- I take it you have you never changed an outboard motor's water pump impeller.
The oil is contained within the lower unit. Removing the lower unit from the rest of the outboard does not change that.
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| John Fyke |
Posted on 06/02/11 - 10:23 PM
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Thank You so much Tom I have, many times. I have never dropped a lower unit full of oil.
John Fyke
Re-Fit or Reef It
1979 15' Sport with Super Sport conversion and 70hp mercury. |
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| CES |
Posted on 06/03/11 - 3:32 AM
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Depending on the size of the moter, lower units typically carry a relatively small amount of oil. My 40hp carries just less that a quart of oil in the lower unit. Larger motors carry slightly more but the weight of the oil is negligible. I just changed my impeller a few weeks ago and didn't drain the oil first, it was easy to do.
Edited by CES on 06/03/11 - 3:33 AM
Cliff
1966 13' Sport with a 1993 40hp Yamaha 2 Smoker |
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| awayland |
Posted on 06/03/11 - 4:03 AM
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I've changed the impeller on many motors 3hp to 90hp without dropping the oil. But had to on my 260 V8 inboard outboard. If you don't when you separate the lower unit all the oil in the top half will come out anyway.
1970 custom 16 with 1999 Merc 2 stroke 90hp |
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| Sax416 |
Posted on 06/03/11 - 5:21 AM
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I'm torn on the oil change thing. Does it need to be done when changing the impeller? Not that I've ever seen. Is it a nice gesture on the part of the mechanic? Not if he marked up the lube and charged you labor for doing it. Ive changed it every time I did my impellers but only because I'm already farting around with the lower unit and it's less than $10. If someone charged me $50 and I didn't ask them to do it I'd be a little ticked. Another point to conside is some people are very particular on the lubricants they use. I wouldn't want someone taking out my preferred lube and replacing it with some bulk no name lube.
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| CES |
Posted on 06/03/11 - 5:30 AM
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Sax, no it doesn't need to be changed at the same time you replace the impeller. But, like you said, many folks do change the impeller and oil at the same time for the reason you've stated above. I've changed my lower unit oil many times without ever removing the lower unit from the engine, it's a simple process. At other times, I've removed the lower unit from the engine to change the impeller without removing the oil from the lower unit. The oil and impeller are two seperate entities and one does not rely on the other.
Edited by CES on 06/03/11 - 5:31 AM
Cliff
1966 13' Sport with a 1993 40hp Yamaha 2 Smoker |
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| Sax416 |
Posted on 06/03/11 - 6:13 AM
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I'd change that oil every year as part of normal maintenance. If it happens to be on a year that the impeller needs to be replaced then I'd do it at the same time. If I brought my car in for a water pump I would not expect the mechanic to do an oil change. The only reason you would do that is if it was obviously overdue or the oil became contaminated during the job (highly unlikely/possibly impossible). If he charged you for it then that's a bad business decision on his part. If he did it for free or for his cost on the lube then it's just a mechanic treating your engine how he would probably treat his own. If it's the latter then he had positive intentions whether or not changing the lube in the lower case is required or not during an impeller change. If he charged you full price it's bs. Now for the gentleman who started this thread... That mechanic was probably going to clean and repaint your t&t and sell it back to you. That's bs.
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| cmeichler33 |
Posted on 06/03/11 - 7:06 AM
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I guess this topic is a good debate, and good info for us what to expect when we bring our outboards in for service. I have taken the time to do things myself by reading this forum, service manuals and asking questions. I also have found a good mechanic. Unfortunately, there are some shops that are not very honest. This is a good thread to educate ourselves!!
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| tom blinstrub |
Posted on 06/03/11 - 7:43 AM
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You are supposed to change gear oil when you put the boat away before winter because if there is water in the gear case the case can crack in severe winter temps. So if you were going to replace the impeller in the spring why would you change the gear oil again? Don't try to second guess the factory. I had a new 25 Tohatsu and it said to change the gear oil after 30 hours. I waited too long and had about 150 hours on it when I pulled the plug and nothing but water came out.My dealer's mechanic said the seal was bad from the factory.He said don't worry they will run with water. After 5 years of hard service the engine was still fine when I sold it. Motto is follow instructions.
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