This is a replacement HPI Nitro Star F3.5 V2 Nitro Engine with Pullstart. The F3.5 V2 features a crankcase and heatsink design with larger heatsink fins for improved cooling. This design makes the engine 22g lighter and 4mm taller. A pullstart utilizes a one-way bearing encased in a large 14mm hex for increased durability.
The F3.5 engine will give you eye-opening acceleration and crazy top speeds! The engine is started by a simple pullstarter system and the two-needle carburetor allows you to fine-tune the performance for any kind of weather or fuel.
One added benefit of the Nitro Star F3.5 is that it’s a race-legal .21-size engine, which means you can drop down to your local track or club and enter in a race as soon as you open the box! On the inside, the F3.5 has true ABC construction, with a chrome-plated brass piston and cylinder surrounded by the lightweight aluminum case.
Features:
- 2.5 horsepower on tap
- Race-legal .21 engine size
- True ABC construction for long life
- Composite carb construction helps prevent heat vaporization of fuel
- Finned aluminum case
- Huge aluminum heatsink
- Tough pullstarter fitted standard
- 2-stage air filter for extra engine protection
- Splash cover over air filter keeps the engine from getting flooded with water in wet conditions
- 2-needle carb adjustment for fine-tuning
This product was added to our catalog on May 3, 2023
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Jeff C Verified Owner Monday, Sep 1 2025 (4 weeks ago) HPI Nitro Star F3.5 V2 Engine w/Pullstart Put this in my wr8 3.0. It rips like hell. Runs like crap on 20% vp but 25% is where its game. Added the rotostart 3 as well. 8 tanks so far and starts right up every time. Oh did i mention that it rips like hell? Andries Buskens Thursday, Jun 8 2023 (about 2 years ago) HPI Nitro Star F3.5 V2 Engine w/Pullstart Fantastic engines as well, you truly can’t go wrong with any Hpi nitro stuff! I suggest O.S glow plugs but HPIs new glow plug line ups are fantastic too! I just like the longevity and reassurance of an older glow plug product line! The 4.6 is a worthwhile upgrade too! If you want more power and should be an exact drop in replacement View all reviews
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