HPI Racing Nitro Star F4.6 Engine w/Pull Start

Tower Stock# LXTHD0  •  Manufacturer Stock# 1495
HPI Racing Nitro Star F4.6 Engine w/Pull Start (large view)
Notes from our tech department:
This is HPI's Nitro Star F4.6 .28 size Engine With Pullstarter.
Can be installed in the HPI Savage X 4.6 Monster Truck
for those who prefer an engine with a pull starter.


Composite construction slide valve, 7.5mm 3 needle carburetor, high
speed needle, idle screw and low speed needle are set flush with
the carburetor body for factory settings
8 port chrome plated brass sleeve
ABC cylinder construction, "A"luminum piston with a "B"rass cylinder
that is "C"hrome plated
Grey anodized billet aluminum heat sink head
Round rear exhaust port
Cast aluminum crankcase with heatsink fins
Machined pilot shaft crankshaft with collet preinstalled
Knife-edge billet aluminum connecting rod with dual bushings.
High flow 2-stage air filter dramatically reduces intake
restriction as it smoothes and straightens air flow
Two year limited warranty


Nitro Star .28 F4.6 glow engine
Glow Plug - HPI R5 cold plug (HPIG1504 for a replacement)
Dual Stage Air Filter (HPIC7198 for replacement)
Instructions and exploded views


Height/bottom of Mounting Flanges/top of Cylinder Head: 4" (101mm)
Height/bottom of Crankcase/top of Cylinder Head: 4.5" (114mm)
Length from Pull Starter to Front Bearing: 3.3" (84.5mm)
Length from Pull Starter to end of Crankshaft: 4.6" (117mm)
Width at Mounting Flanges: 1.81" (45.9mm)
Mounting Hole Center Same Side: .82" (21mm)
Mounting Hole Center Opposite Side: 1.42" (36mm)
Bore: 18.68mm
Stroke: 16.6mm
Horsepower: 2.9 @ 32,000 RPM
Crankshaft diameter: 5mm (clutch bell area)
Crankshaft diameter: 6.7mm (threaded portion)
Displacement: 4.6cc (.28 ci)


Glow Fuel: 20-25% nitro content
Glow starter
Tuned pipe


This engine can be converted from recoil to Roto Start with
HPIP7126. If the modeler only wants a Roto Start Backplate they can
can purchase HPIG7127.
jxs 11/19/07

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