Jun thirty, 2012 #one There are a lot of water-in-the-oil threads so I just thought I would throw this to choose from. Any water means a seal is leaking, and it can be as simple as an oil fill plug seal or as tough like a prop shaft seal. The crucial element is discovering which ones are leaking. After i rebuild a lower unit, I test it for both of those beneficial and detrimental pressure, as per the factory manual. I originally made this tiny tester tool to use on my outdated '56 30hp with a bicycle pump w/gauge along with a Mighty Vac tool. All it truly is can be a brass tire tube valve stem inserted into a short piece of plastic tubing and secured with a hose clamp.
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We’ll make use of the Yamaha mainly because it is usually a good basic gear case that numerous other brands have the same procedure to change out the seals. You only should pull out the seals and reinstall the new kinds.
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Find the test port around the lower unit of your respective outboard motor. The location of the port can vary depending upon the make and model of your motor.
Given that you know all about pressure testing your gearcase! Here are some other articles or blog posts that we have published which you will uncover really website practical and informational!
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I force threaded it so which the tubing screws in the oil fill hole. I make use of the bicycle pump w/gauge to test beneficial pressure And that i test for up to twenty psi. I unscrew the valve from inside the stem and hook up the Mighty Vac with a brief bit of hose to test for damaging pressure up to 20 hg. A leak will make noise, and soapy water will bubble being a give away. In case your lower unit can keep both negative and optimistic pressure for 15 minutes, it is possible to ensure it will not shed any oil or choose in any water. Just click the pic for a better look.
Use a lower unit oil pump to introduce lower unit oil in to the lower unit by way of the pressure gauge adapter.
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Should the pressure test effects propose prospective troubles, it’s crucial to address them immediately to prevent more comprehensive damage towards your outboard motor’s lower unit. Below are a few steps to contemplate:
Observing that there are many diverse brands. We Individually advocate the Stevens pump. And that's based mostly much more over a design than anything else.