
This is the LRP ZR.28R Spec. 3 Nitro Competition Engine with Pull Starter. **Additional Technical Info Will Be Added When It Becomes Available.** FEATURES: Designed for high-competition monster truck applications VTEC competition slide valve carburetor with 9mm venturi Universal fit - fits all major .21-.25 engine mounts LRP CoolDownMax cylinder head with new cooling fin arrangement for improved cooling ABC piston and liner construction "A"luminum piston fitted to a "B"rass cylinder liner that is "C"hrome plated XTEC T6 crankcase 8+1 ports (8 transfer and 1 exhaust port) 13mm crankshaft CNC-machined piston Oversized knife edged aluminium connecting rod w/double bushings LRP guarantees this engine to be free from defects in material and workmanship for 90 days (non-European countries only) from the original date of purchase. INCLUDES: ZR.28R Spec. 3 Nitro Engine with Glow Plug and Instructions REQUIRES: Fuel: Car blend fuel w/25% nitro content, do not exceed 36% nitro content Air filter, glow starter, and track equipment SPECS: RPM: 33,500 max. Displacement: .28 cu in (4.59ccm) Bore: 18.5mm Stroke: 17mm Max Power: 3.89HP Weight: 15.9oz (450g) Carburetor Settings: Mid Range: 3.75 turns open Main Speed Needle: 3.75 turns open Idle Screw: Should be open 0.5 - 1mm, turn clockwise for higher idle speed, counterclockwise for lower idle speed Height from crankcase bottom /top of cylinder head: Height from mounting tab bottom/top of cylinder head: Width at Mounting Tabs: