Jun thirty, 2012 #1 There are a lot of water-in-the-oil threads so I just imagined I would toss this around. Any water indicates a seal is leaking, and it might be as simple as an oil fill plug seal or as really hard for a prop shaft seal. The real key is obtaining which ones are leaking. After i rebuild a lower unit, I test it for equally constructive and damaging pressure, According to the factory manual. I originally made this minimal tester tool to implement on my previous '56 30hp with a bicycle pump w/gauge as well as a Mighty Vac tool. All it is is often a brass tire tube valve stem inserted into a short bit of plastic tubing and secured with a hose clamp.

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The shafts and clutch are very carefully and totally inspected to assure efficiency reliability. All tolerances are checked for easy, correct unit operation. (Johnson and Evinrude outboards don't contain water pump assemblies.)

If the outboard motor includes a created-in test port, attach the pressure gauge immediately. If not, make use of the adapter to attach the pressure gauge to the test port.

Conducting normal lower unit pressure tests on your outboard motor gives a multitude of advantages that go beyond regimen maintenance. Below are a few essential benefits of incorporating these tests into your boat care routine:

Pro Support: Our team of Mercury specialists is usually Prepared to provide expert advice by selecting the ideal unit for yourself.

The 2 most important variations are the pump fashion and squeeze design. The pump design will generally be put in place to perform either pressure or vacuum, although not both.

Although spinning the shafts and seeking air bubbles. If you do see air bubbles, you will ought to change out those seals that you just come across for being leaking.

Refill the lower unit with the appropriate gear lube as laid out in your Yamaha outboard's service manual.

At US Boatworks, we’re proud to offer prime high-quality Mercury remanufactured lower units; constructed by educated pros under the supervision of US Boatworks’ professionals serving customers for much more than 40 years.

How can customers get aid within the specialist workforce at US Boatworks? Customers can Make contact with US Boatworks by using get in touch with, textual content, or e-mail to receive pro guidance and be certain a great boating time.

From 1st time boat owners that wish to learn how to handle your boat, to those aspiring to become marine professionals with diagnostic outboard engine courses, there is one thing for yourself get more info inside the Boater's Application!

If so you should observe this movie with complete attention in order to avoid common lower unit replacement blunders. As well as learn how to save money although obtaining an outstanding drive that will final for years.

We’ve said quite a bit about pressure testing the lower unit. But we’ve also been referring to performing a vacuum test. So what is often a vacuum test And exactly how does it compare to the pressure test?