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⚙️ Don’t let leaks sink your season—test like a pro, maintain with pride!
The Stevens Instrument Company S-34 Gearcase Pressure Tester is a compact, lightweight tool designed to pressurize and test outboard and sterndrive gearcases for leaks. Featuring a standard 3/8-16 vent plug thread, it ensures reliable sealing during maintenance or repairs. Trusted by DIY enthusiasts and professionals alike, it holds pressure for over 24 hours, helping prevent costly water damage and ensuring optimal gearcase performance.
| ASIN | B005GY9X7Q |
| Best Sellers Rank | #1,153,580 in Automotive ( See Top 100 in Automotive ) #196 in Pressure & Vacuum Testers |
| Brand | Stevens Instrument Company |
| Customer Reviews | 4.5 4.5 out of 5 stars (61) |
| Date First Available | August 11, 2011 |
| Item Weight | 2.3 pounds |
| Item model number | S-34 |
| Manufacturer | Stevens Instrument Company |
| Manufacturer Part Number | S-34 |
| National Stock Number | 4910-01-132-9147 |
| OEM Part Number | STVS34 |
| Product Dimensions | 18.25 x 6.75 x 5 inches |
J**D
The right tool for pressure testing outdrives
Replaced O rings in two Bravo One sterndrives this spring and was able to use this tester to pump the required air into the drives to pressure test them. Held pressure at 15 pounds for 24 hours. Drives sealed well and had no water in them when oil was drained for the season. Worked perfectly. Good investment for DIY outdrive maintenance.
T**N
Great
Great
A**R
Five Stars
Works great. Use it a few times a week
S**E
Worth the money
Solid well built product , holds up well to 8 hr workdays at a pro Boat repair shop like Shadow Mountain Marine
Y**R
Works great
Great product works great
A**R
Worth the money
This pressure tester worked great on my Volvo out drive.
S**R
Perfect
Does the job
C**G
Five Stars
Worked great
Trustpilot
1 month ago
1 month ago