It’s critically important to frequently check the gearcase on your drive and prop shafts for water intrusion. If water has gotten inside, it most likely means there is a degraded seal (or seals) that will need to be replaced. Most people check for water when changing out the gear oil. They will drain the oil, check for water, and then replace the oil.
But testing for water in this way means you may not discover a leaking seal until after it’s already causing problems. In extreme cases, this can cost you a boatload of money, especially if you don’t catch the water intrusion in time.
So we recommend using this pressure/vacuum tester that allows you to test the performance of the gear case seals more easily. By doing this, you’ll be able to detect the problem before symptoms of the problem present.
Gearcase Pressure/Vacuum Tester Features
Each gearcase seal actually contains two separate seals. The inner seal works to keep the oil inside the gear case, and the outer seal keeps the water out. With this tester, you can test with both vacuum and pressure to check each seal for degradation without changing out the oil entirely — and before too much water has a chance to get in.
This tester is a combination unit so that you can do both pressure and vacuum testing with one unit. While using the tester, simply flip the valve on the side of the unit to change from vacuum to pressure and back.
The unit fits most Chrysler, Evinrude, Force, Johnson, Mariner, and Mercury outboards. Our set also includes adapters to fit Suzuki, Tohatsu, and Yamaha lower units.
Comparable to:
- CDI Electronics 551-34PV Pressure/Vacuum Tester
- S-34 Gearcase Pressure Tester
- V-34 Gearcase Vacuum Tester
Brass Gearcase Adapter Set
Our brass gearcase adapter set comes with one 14” hose barb fitting for a leak-free connection to three adapters. The set fits most Chrysler, Evinrude, Force, Johnson, Mariner, Mercury outboards, and Suzuki, Tohatsu, and Yamaha lower units.
Fix the Problem Before It Gets Out of Hand
By detecting problems early on, you’ll have a much easier time getting them fixed, and you may even save yourself a lot of money getting even bigger problems fixed down the road. Most importantly, you’ll save yourself time that can be better spent doing what you love out on the water.
At Marine Tech Tools, we’re committed to providing quality, time-saving tools that get the job done and minimize the risk of damage or wasted time. We use our tools ourselves to fix our own boats, so you can be sure that we only recommend the very best.
We also provide training videos to help you take ownership of your boat’s maintenance and repairs. Keeping your boat in top shape doesn’t have to break the bank, and it doesn’t have to cost you weeks of your boat sitting in the repair shop, either. We’ll walk you through the most common maintenance checks and repairs, and help make sure you have all the tools you need to do it right the first time.
Check out some of our training on replacing worn-out seals:
