---
product_id: 534995145
title: "Aviation Fuel Tester with built-in cowl screwdriver, Model 391S, Clear and Yellow"
brand: "smartsf"
price: "237.68 DT"
currency: TND
in_stock: true
category: "Smart Sf"
url: https://www.desertcart.tn/products/534995145-aviation-fuel-tester-with-built-in-cowl-screwdriver-model-391s
store_origin: TN
region: Tunisia
---

# Precision alcohol % markings Compact 14x17x25 cm size Built-in cowl screwdriver Aviation Fuel Tester with built-in cowl screwdriver, Model 391S, Clear and Yellow

**Brand:** smartsf
**Price:** 237.68 DT
**Availability:** ✅ In Stock

## Summary

> ⛽ Test smarter, not harder — your cockpit’s new best friend!

## Quick Answers

- **What is this?** Aviation Fuel Tester with built-in cowl screwdriver, Model 391S, Clear and Yellow by smartsf
- **How much does it cost?** 237.68 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/534995145-aviation-fuel-tester-with-built-in-cowl-screwdriver-model-391s)

## Best For

- smartsf enthusiasts

## Why This Product

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

## Key Features

- • **Reliable Power:** Battery-powered for consistent performance anytime, anywhere
- • **Trusted Standard:** Industry staple with clear, accurate alcohol percentage markings
- • **All-in-One Utility:** Integrated cowl screwdriver for on-the-spot adjustments
- • **Compact & Portable:** Lightweight and space-saving for easy carry and storage
- • **Fuel Testing, Simplified:** No-hole probe design for quick, mess-free readings

## Overview

The Aviation Fuel Tester Model 391S by SmartSF is a compact, battery-powered tool featuring a no-hole probe and clear alcohol percentage markings for precise fuel quality checks. Its built-in cowl screwdriver adds practical utility, making it an essential, space-saving device trusted by professionals for reliable, on-the-go fuel testing.

## Description

With its compact size, no-hle probe, and % alcohol markings, this fuel tester has been a standard for years. Sold Individually, 5 per Retail Display Box

## Features

- Emergency channel, Automatic frequency tuning, Flashlight, Backup power, bottle opener and SOS alarm. This is the most multi-function 4 in 17, practical and cost-effective emergency weather radio in history.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0016BQEGQ |
| Best Sellers Rank | 316,331 in Automotive ( See Top 100 in Automotive ) 1,563 in Fuel System Tools |
| Brand | SmartSF |
| Colour | Yellow |
| Customer Reviews | 4.0 4.0 out of 5 stars (2) |
| Item Dimensions | 14 x 17 x 25 centimetres |
| Manufacturer | Daansen USA, Inc. |
| Measurement Type | Voltmeter |
| Minimum Operating Voltage | 3 Volts |
| Model Number | 391S |
| Power Source | Battery Powered |
| Style Name | Compact |

## Product Details

- **Brand:** SmartSF
- **Colour:** Yellow
- **Item dimensions L x W x H:** 14 x 17 x 25 centimetres
- **Power source:** Battery Powered
- **Style:** Compact

## Images

![Aviation Fuel Tester with built-in cowl screwdriver, Model 391S, Clear and Yellow - Image 1](https://m.media-amazon.com/images/I/3151bCRVqvL.jpg)

## Questions & Answers

**Q: What is a aviation fuel tester for**
A: A Fuel tester is used to drain fuel at the lowest point in an aircraft fuel tank. The fuel drains into the clear part of the tester and you can see if there is any water and/or sediment (dirt) in the fuel. This is part of a pilot's pre-flight checks.

## Frequently Bought Together

- Aviation Fuel Tester with Built-in Cowl Screwdriver, Model 391S, Clear and Yellow
- Luso Aviation Fuelhawk Aircraft Fuel Gauge, Cessna 172-26.5 Gallon
- FAR/AIM 2025: Federal Aviation Regulations/Aeronautical Information Manual (ASA FAR/AIM Series)

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**Shop now:** [https://www.desertcart.tn/products/534995145-aviation-fuel-tester-with-built-in-cowl-screwdriver-model-391s](https://www.desertcart.tn/products/534995145-aviation-fuel-tester-with-built-in-cowl-screwdriver-model-391s)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-02*