Skip to content
  • 🎁 Buy gifts for everyone on your list during our snap sale!🎁
  • 🎁 Buy gifts for everyone on your list during our snap sale!🎁
O.S. ShopO.S. Shop
    • No products in the cart.

      Return to shop

  • Cart

    No products in the cart.

    Return to shop

  • Parts
    • Engine Parts
    • Screws, Bolts & Washers
    • Propellers & Accessories
    • Option Parts
    • Replacement Parts
  • Uncategorized
  • Engines/fuel
    • Engine Accessories
    • Nitro Engines
    • Fuel & Accessories
  • Maintenance
    • Nitro Engine Tools
    • Tools
  • Electronics
    • Electric Motors & Esc’s
Home / Engines/fuel
  • O.S. FSa-72II Airplane Engine with F-5030 Silencer -O.S. Shop osm34721
  • O.S. Speed R21GT .21 On-Road Engine Combo w/T-2060SC Pipe (Turbo) -O.S. Shop osmg2097
Sale!
O.S. Max 105HZ-R DRS Helicopter Engine
O.S. Max 105HZ-R DRS Helicopter Engine - Image 2
O.S. Max 105HZ-R DRS Helicopter Engine - Image 3
O.S. Max 105HZ-R DRS Helicopter Engine - Image 4
O.S. Max 105HZ-R DRS Helicopter Engine - Image 5
O.S. Max 105HZ-R DRS Helicopter Engine - Image 6
O.S. Max 105HZ-R DRS Helicopter Engine -O.S. Shop osm18750 1
O.S. Max 105HZ-R DRS Helicopter Engine -O.S. Shop osm18750 2
O.S. Max 105HZ-R DRS Helicopter Engine -O.S. Shop osm18750 3
O.S. Max 105HZ-R DRS Helicopter Engine -O.S. Shop osm18750 4
O.S. Max 105HZ-R DRS Helicopter Engine -O.S. Shop osm18750 5

O.S. Max 105HZ-R DRS Helicopter Engine

$545.99 Original price was: $545.99.$84.00Current price is: $84.00.

Buy Now
SKU: 220707 Category: Engines/fuel Tag: O.S.
  • Online customer care, always here for you.
  • Secure Payments, Secure Shopping
  • Free 1 year warranty period
  • Product guarantee 100% satisfaction
Browse
  • Electronics
    • Electric Motors & Esc's
      • Electronic Speed Controls
        • Airplanes
  • Engines/fuel
    • Engine Accessories
      • Air Filters
        • Dry Filters
        • Filter Assemblies
      • Engine Storage
      • Glow Plugs
      • Tuned Pipe Manifolds
      • Tuned Pipes
        • .21+
    • Fuel & Accessories
      • Fuel Filters
    • Nitro Engines
      • .12 (2.1cc)
      • .21 (3.5cc)
        • Off Road
        • On Road
  • Maintenance
    • Nitro Engine Tools
      • Flywheel Tools
        • Boats
      • Piston & Crankshaft Locks
    • Tools
      • Electric Screwdriver Tips
        • Hex Tips
  • Parts
    • Engine Parts
      • Engine Bearings
      • Misc Engine Parts
      • Novarossi
      • O.s. Engines
        • Helicopters
    • Option Parts
    • Propellers & Accessories
    • Replacement Parts
      • Traxxas
    • Screws, Bolts & Washers
      • Cars & Trucks
  • Uncategorized
  • Description
  • Reviews (0)

This is the O.S. Max 105HZ-R DRS Helicopter Engine. The 105HZ-R DRS is the engine that precision aerobatic and 3D heli pilots have been waiting for! In order for 90-sized machines to nail huge maneuvers and hardcore, smack down-style 3D it’s all about power, and the 105HZ-R have it in abundance. Displacement has been increased by 15%, and a huge venturi rams air into the carburetor, producing massive power, while remaining small enough to fit in a .90-sized mounting pattern.

Features:

  • Displacement of a 1.05 in the mounting space of a .90.
  • More displacement means more power, and these engines boost displacement by 15%!
  • Huge venturi boosts output even further.
  • The machined, blue anodized heatsink head is light in weight, and cools the engine efficiently.
  • Pressurized DRS (Demand Regulator System), ensures consistent fuel flow regardless of the heli’s attitude.

Specifications:
Displacement: 1.048 cu in (17.17cc)
Bore: 1.442″ (29mm)
Stroke: 1.024″ (26mm)
Practical RPM: 2,000-16,500
Output: 3.75 hp @ 15,000 RPM
Weight: 21.46 oz (608g)

This product was added to our catalog on January 25, 2012

Reviews

There are no reviews yet.

Be the first to review “O.S. Max 105HZ-R DRS Helicopter Engine” Cancel reply

Related products

Sale!
O.S. Lower Unit Assembly: 21XM
Quick View

Engine Parts

O.S. Lower Unit Assembly: 21XM

$249.99 Original price was: $249.99.$62.00Current price is: $62.00.
Sale!
O.S. Cylinder & Piston Assembly: 75AX
Quick View

Engine Parts

O.S. Cylinder & Piston Assembly: 75AX

$124.99 Original price was: $124.99.$88.00Current price is: $88.00.
Sale!
O.S. 22C-B Carburetor (B2102)
Quick View

Engine Parts

O.S. 22C-B Carburetor (B2102)

$139.99 Original price was: $139.99.$80.00Current price is: $80.00.
Sale!
O.S. GGT15 15cc Gas/Glow Ignition 2-Cycle Engine with Muffler
Quick View

Engines/fuel

O.S. GGT15 15cc Gas/Glow Ignition 2-Cycle Engine with Muffler

$444.99 Original price was: $444.99.$88.00Current price is: $88.00.
Sale!
O.S. Carburetor 21M: 21XZ-R VII
Quick View

Engine Parts

O.S. Carburetor 21M: 21XZ-R VII

$144.99 Original price was: $144.99.$60.00Current price is: $60.00.
Sale!
O.S. Carburetor 12F2-B: 12XZ Speed Spec 3
Quick View

Engine Parts

O.S. Carburetor 12F2-B: 12XZ Speed Spec 3

$114.99 Original price was: $114.99.$69.00Current price is: $69.00.
Sale!
O.S. FR7-420 Sirius7 7-Cylinder Radial 4-Stroke Engine
Quick View

Engines/fuel

O.S. FR7-420 Sirius7 7-Cylinder Radial 4-Stroke Engine

$563.00 Original price was: $563.00.$89.00Current price is: $89.00.
Sale!
O.S. GF40 40cc 4-Stroke Gas Airplane Engine with Muffler
Quick View

Engines/fuel

O.S. GF40 40cc 4-Stroke Gas Airplane Engine with Muffler

$799.99 Original price was: $799.99.$85.00Current price is: $85.00.
MY ACCOUNT
  • Cart
  • Checkout
  • My account
  • Wishlist
legal
  • Privacy Policy
  • Shipping & Returns
  • FAQ
  • Returns & Exchanges
  • Term and Conditions
customer service
  • Delivery
  • Payment Method
  • Contact Us
  • About Us
Signup for Newsletter
Stay up to date with news and promotions by signing up for our newsletter

    Copyright 2025 © www.prefixos.com
    • Parts
      • Engine Parts
      • Screws, Bolts & Washers
      • Propellers & Accessories
      • Option Parts
      • Replacement Parts
    • Uncategorized
    • Engines/fuel
      • Engine Accessories
      • Nitro Engines
      • Fuel & Accessories
    • Maintenance
      • Nitro Engine Tools
      • Tools
    • Electronics
      • Electric Motors & Esc’s
    • Login

    Login

    Lost your password?

    Register

    Your personal data will be used to support your experience throughout this website, to manage access to your account, and for other purposes described in our privacy policy.