A lower unit pressure test just isn't some thing You'll have to perform anytime you use your boat, but recognizing when to carry out a person can save you from far more extensive and high priced repairs down the line. When need to you concentrate on this essential checkup for your Yamaha outboard motor?
When the pressure remains continual, it suggests which the lower unit is sufficiently sealed, and no significant problems are present. Having said that, if pressure drops, it implies a potential problem, and further more inspection and repairs may very well be required.
Then reinstall the lower drain screw and tighten it down with a seal. We will install the pressure tester into the vent. And The key reason why you wish to put the pressure tester into the vent hole.
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More Inspection: Start by conducting a more in depth inspection on the lower unit to pinpoint the source of The problem. Seek out signs of oil or water leakage, damaged seals, and worn components.
This motivation to good quality signifies you'll be able to anticipate Outstanding reliability and overall performance within the water. Lowers rebuilt by Certified Mechanics
Right after ready all winter, you’re all established for just a much expected boating and fishing period. And then the unthinkable transpires – you expertise a lower unit failure.
I force threaded it so the tubing screws to the oil fill hole. I utilize the bicycle pump w/gauge to test beneficial pressure And that i test for up to twenty psi. I unscrew the valve from Within the stem and hook up the Mighty Vac with a short piece of hose to test for adverse pressure up to 20 hg. A leak will make noise, and soapy water will bubble like a give away. If your lower unit can keep both of those detrimental and beneficial pressure for 15 minutes, you'll be able to make sure it will not drop any oil or take in almost any water. Just click the pic for a better appear.
Now read more install the pressure tester in the top vent screw hole and pump around 10-12 PSI. Spray soapy water across the seals on the drive, change, and prop shaft. Inspect for bubbles indicating a leak.
Cost Price savings: Well timed detection and backbone of lower unit troubles generally come at a portion of your cost of important repairs or replacements.
Conducting a lower unit pressure test is a vital Section of outboard motor maintenance. Follow these action-by-action Directions to execute the test properly:
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