---
product_id: 62966800
title: "S-34 Gearcase Pressure Tester, Black"
brand: "stevens instrument company"
price: "€ 34.00"
currency: EUR
in_stock: true
reviews_count: 8
category: "Stevens Instrument Company"
url: https://www.desertcart.es/products/62966800-s-34-gearcase-pressure-tester-black
store_origin: ES
region: Spain
---

# Holds pressure for 24+ hours Compact 18.25 x 6.75 x 5 in size Precision 3/8-16 vent plug thread S-34 Gearcase Pressure Tester, Black

**Brand:** stevens instrument company
**Price:** € 34.00
**Availability:** ✅ In Stock

## Summary

> ⚙️ Seal the deal on your gearcase with confidence!

## Quick Answers

- **What is this?** S-34 Gearcase Pressure Tester, Black by stevens instrument company
- **How much does it cost?** € 34.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/62966800-s-34-gearcase-pressure-tester-black)

## Best For

- stevens instrument company enthusiasts

## Why This Product

- Trusted stevens instrument company brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Fit:** Standard 3/8-16 vent plug thread ensures seamless compatibility
- • **Compact & Portable:** Lightweight 2.3 lbs design fits comfortably in any tool kit
- • **Trusted Durability:** Stevens Instrument quality with 4.5-star user approval
- • **Leak-proof Confidence:** Easily detect gearcase leaks with a reliable pressure gauge
- • **DIY Maintenance Master:** Perfect for professional-grade outdrive and sterndrive testing at home

## Overview

The S-34 Gearcase Pressure Tester by Stevens Instrument Company is a compact, durable tool designed for precise pressure testing of outboard and sterndrive gearcases. Featuring a standard 3/8-16 vent plug thread and the ability to hold pressure for over 24 hours, it ensures reliable leak detection during maintenance or repairs. Lightweight and highly rated, it’s the go-to tester for DIY professionals aiming to maintain peak gearcase performance.

## Description

Pressure test outboard and sterndrive gearcases with the S-34. Tests should be made during lube operations and following gearcase repairs. Simply pressurize and observe gauge for any leakage. Fitted with standard 3/8-16 vent plug thread. "http://67.139.33.138/Attachments/attachments/images/logo/720275.jpg" alt="Stevens Instrument"

Review: 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.
Review: Great - Great

## Features

- Part number: S-34
- Package Weight: 1.043 kilograms
- Oem equivalent part number: STVS34
- Package Dimensions: 45.974 L x 13.208 H x 17.018 W (centimeters)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005GY9X7Q |
| Best Sellers Rank | #372,060 in Automotive ( See Top 100 in Automotive ) #116 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 |

## Images

![S-34 Gearcase Pressure Tester, Black - Image 1](https://m.media-amazon.com/images/I/31E3ZzD9R+L.jpg)
![S-34 Gearcase Pressure Tester, Black - Image 2](https://m.media-amazon.com/images/I/61f2fulHAFL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ The right tool for pressure testing outdrives
*by J***D on October 24, 2019*

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.

### ⭐⭐⭐⭐⭐ Great
*by T***N on March 22, 2025*

Great

### ⭐⭐⭐⭐⭐ Five Stars
*by A***R on June 1, 2018*

Works great. Use it a few times a week

## Frequently Bought Together

- Stevens Instrument Company S-34 Gearcase Pressure Tester, Black
- Lower Unit Adapters fit Most Major Brands Outboard Motor(3/8 inch Swivel/10mm/8mm) DOES NOT FIT VOLVO PENTA

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**Shop now:** [https://www.desertcart.es/products/62966800-s-34-gearcase-pressure-tester-black](https://www.desertcart.es/products/62966800-s-34-gearcase-pressure-tester-black)

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-02-15*