New FUJI BT-86 twin gas motor - Free Shipping - RCU Forums

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New FUJI BT-86 twin gas motor - Free Shipping


New FUJI BT-86 twin gas motor - Free Shipping

Engines & Motors - Gasoline Engines, Fuji Engines, BT-86 twin

09-18-2019, 01:07 PM | Replies: 0 | Views: 271
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Join Date: May 2009
iTrader: (66)
MSE01 is offline  

  • Price
  • Location Kansas City, MO, USA
  • Condition New
  • Manufacturer Fuji Engines
  • Model BT-86 twin

86cc size Twin Cylinder 2-stroke Gas Engine from Fuji Imvac Inc.
FEATURES: Gasoline engine for large scale aircraft applications.
CDI (Capacitive Discharge Ignition) One-piece, solid state electronic ignition
CNC Machined
Two decompression valves allow the engine to be rotated easily during starting. Either valve can be pushed in, and once the engine fires, the valve automatically recloses for running compression.
Valves are located in the center part of each cylinder. The front valve is easily accessible by hand in airplanes with open cowls
The rear valve can be operated by a firewall mounted servo in airplanes with closed cowlings. (For firewall mounted servo, the
modeler must decide where and how to install it, and may need an extra channel on the radio for operation.)
One-set needle valve so you can fly all day without having to change valve settings on the easy-to-understand Walbro carburetor.
Propeller is held securely by a knurled hub
Muffler is designed specifically for use in R/C airplanes having three exhaust ports instead of one. The mufflers mount to the
engines' cylinder heads on both sides.
Heads are painted light blue and crankcase is natural silver.
Cylinders utilize chrome plated internal construction
REQUIRES: Fuel: Regular gasoline mixed with a high quality two-cycle oil
Gas/Oil Mix is 40:1 (3.25 ozs. per gallon of unleaded gasoline)
Spring starting the engine
Propeller: Propeller 24 x 12 (6,800 rpm)
Propeller 24 x 10 (7,500 rpm) (
3.0mm hex wrench for hub and muffler screws
Fuel consumption: This engine will use approximately 2oz./min at full throttle with an average sized prop. Factors that will vary this consumption are carb settings and prop size.
SPECS: Displacement: 86cc
Bore: 30mm
Stroke: 42.7mm
Horse Power: 7.5 HP / 9,000 rpm
RPM: 1,100 to 9,000 rpm
Ignition Style: CDI Automatic Ignition Timing
Weight: 2.9 kg with muffler
Spark Plug: Champion RCJ-6Y or 7Y, gap of 0.6mm (.025")
Propeller Bolt: M10x1.75
Magneto Gap: .5mm (.020")
Engine mounting holes on rear of crankcase: 6mm (.24")
Overall Length, from back of prop to start shaft end: 197mm (7.75")
Width: 218mm (8.6") Width with plugs. 260mm (10.25in)
Overall height: 203mm (8")
Length from back of mount to prop nut: 160mm (6.3")
Height from crank to top of engine: 75mm (3")
Break-In Fuel: 25:1 mixed gasoline (run for one hour with this mix)
Running Fuel: 40:1 mixed gasoline (3.25 ozs. of 2-cycle oil per gallon of gas)
COMMENTS: Idle Adjustment:
High Speed Needle Adjustment: H needle 1 turn from fully closed.
Low Speed Needle Adjustment: L needle 1-1/2 turns from fully closed.

One of many motors I have purchased for planned projects which I will not be using. This motor was purchased as "new" from a member on RCU several years back but on very close inspection may have been started once - not sure but for practical purposes the motor is basically new. The specifications were pulled from the internet and represent the best information that I can find on the BT-86.
The motor has been stored in an air conditioned / heated environment.
Included in the price is a NIP spring starter for the BT-86.
Free shipping & insurance in the continental United States. Call for a shipping quote outside of the 48 states
PayPal accepted
If you have any questions please give me a call.

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