---
product_id: 17319739
title: "OS Engines 18642 91HZ-R 3D Speed 61G Helicopter Engine, Black"
brand: "os engines"
price: "$14.40"
currency: USD
in_stock: false
category: "Toys And Games"
url: https://www.desertcart.us/products/17319739-os-engines-18642-91hz-r-3d-speed-61g-helicopter-engine
store_origin: US
region: United States of America
---

# OS Engines 18642 91HZ-R 3D Speed 61G Helicopter Engine, Black

**Brand:** os engines
**Price:** $14.40
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** OS Engines 18642 91HZ-R 3D Speed 61G Helicopter Engine, Black by os engines
- **How much does it cost?** $14.40 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/17319739-os-engines-18642-91hz-r-3d-speed-61g-helicopter-engine)

## Best For

- os engines enthusiasts

## Why This Product

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

## Description

From the Manufacturer



This is the O.S. Engines 91 HZ-R 3D Speed Helicopter Engine in Black. Because of the competition nature of this engine, it is NOT covered by the O.S. 2 Year Warranty.

## Features

- About this item
- FEATURES: Designed for all-out 3D competition Demand Regulator System ensures consistent fuel delivery from full to empty 165E exhaust timing
- INCLUDES: 91 HZ-R 3D Speed Helicopter Engine with #8 Glow Plug, Aluminum Check Valve, 0.008 (0.2mm) Head Gasket, Control Arm and Instruction Manual
- REQUIRES: Fuel: 10%-30% nitro methane with at least 18% lubricant; Lubricants may be either castor or synthetic oil or castor/synthetic blend

## Images

![OS Engines 18642 91HZ-R 3D Speed 61G Helicopter Engine, Black - Image 1](https://images-na.ssl-images-amazon.com/images/I/91J0TUMkbqL.jpg)

---

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---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-18*