Yamaha Outboard Gearcase Pressure Test | Lower Unit Pressure Test | Boats.net

Yamaha Outboard Gearcase Pressure Test | Lower Unit Pressure Test | Boats.net


Hello, John Talley here with Boats.net. Today I’m gonna walk you through the process to do a simple
pressure test on a lower unit. This particular one is one that we just
finished building, It came off our 2004 Yamaha F225. Before I go to mount it
back to the actual lower unit itself, I want to make sure that it’s doing what
it’s supposed to do. So we’re only gonna need one part to pull this off: a
pressure tester which we actually offer at Boats.net. So let me go grab a
screwdriver, we’ll get this connected and see if this thing passes the test. So what we’re gonna do is remove the
upper oil level check bolt. Then we’re going to attach it with the correct
adaptor, take it to around 12 to 13 PSI, and let it sit there for about five
minutes just to make sure all these seals are doing what they’re supposed to
be doing. Now when you go to order one of these, they make several different
adapters make sure that you order the one that you’re going to need for your
particular application. That should do. Now we’re going to take it to about 12
PSI. So we’ve got it at 12 PSI, the rule of thumb is they can hold it there for
10 seconds it’s got it. I usually let it go of it a
little bit longer than that. So we’ll let it sit for a couple of minutes come back
and check it and I consider this one done. Alright guys, it’s still hovering around
that 12 psi mark, so this one’s good to go. So what would you do if yours fell
off immediately? Well you need to go ahead and fill up a spray bottle with
water and just a little bit of hand soap and just spray around the seals and look
for the bubbles. Well listen, if you need any parts or tools for your boat, why
don’t you come see us at Boats.net and we can get you taken care of. If you
like what you see, why don’t you go and hit that subscribe button. That way you can
keep up with whatever I’m working on next. Listen, we just want to say thank you
for shopping here with us at Boats.net, and we will see you in the next
video. Y’all have a great day.

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