Engine - HPI Racing Savage X 4.6 RTR Manual

3-16
NITRO STAR F4.6 ENGINE Maintenance
Engine Maintenance
Drain all remaining fuel from the fuel tank. Use a fully charged glow igniter and try to restart the engine to burn any remaining fuel out of the lines.
After burning off the fuel, remove the glow plug and add several drops of after run oil, then crank the engine over to spread it throughout the

engine.

If one way bearing, Roto Start or connecting rod are damaged, please refer to
diagram below.
Engine Features
Heat Sink
Glow Plug
Carburetor
Exploded view
1472
1471
1470
1473
1468
1481
1483
1485
1469
1476
1477
Z700
Spare Parts List
Number Qty. Description
1495 1 Nitro Star F4.6 Engine With Pullstart
1414 2 Retainer For Piston Pin
1409 4 CAP HEAD SCREW M3.5x16mm
1420 1 Brass Collet
1425 1 O Ring For Cover Plate (21BB)
1426 1 Cover Plate (F4.1)
1427 8 Screw M2.6x6mm For Cover Plate
1428 1 Pullstart Assy. (w/o One-Way Bearing)
1430 1 One Way Bearing For Pullstart
1432 1 Starting Shaft (21BB)
1433 1 Starting Pin/Pressure Spring (21BB)
1434 1 Lock Pin For Carburetor (21BB)
1442 1 Piston Pin/Retainer Set
1447 1 Underhead (F4.6)
Exhaust Outlet
Roto Start
Crankcase
1447
1460
1463
1488
1463
1414
1492
1484
1420
Number Qty. Description
1450 1 Dust Protection And O-Ring Complete Set
1460 4 GASKET FOR CYLINDER (0.2mm/F4.6)
1463 1 Slide Carburetor Complete (Composite/F4.6/D-Cut)
1468 2 Washer Set For Fuel Line Fitting
1469 2 O-Ring For Carburetor Body
1470 1 Main Needle Valve Holder
1471 1 Main Needle
1472 1 Main Needle/Fuel Intake Set
1473 1 Fuel Line Fitting/Washer Set
1476 1 Dust Protection
1477 1 Uniball
1481 1 Slide Carburetor Main Body (Composite)
1483 1 Slide Valve
1484 1 Idle Adjustment Screw
Reference Section
Break In
Linkage set up
Carburetor Set up
Carburetor Features
Idle Adjustment Screw
High Speed Needle
Slide Valve
1489
1442
1432
1433
1414
1425
1426
1491
1434
1493
Number
1485
1488
1489
1490
1491
1492
1493
1504
87117
87118
87119
Z421
Z423
Z700
32
2-7
2-6
2-8
Low Speed Needle
1409
1504
1490
1428
1427
1430
87117
87119
87118
87119
87118
Qty. Description
1 Idle Needle Valve(F4.6/D-cut)
1 Cylinder/Piston Set (F4.6)
1 Cylinder/piston/Connecting Rod Set (F4.6)
1 Aluminum Heatsink Head (Purple/F4.6)
1 Crankcase (Black/F4.6)
1 Connecting Rod (F4.6)
1 Crankshaft (SG Shaft/F4.6)
1 Glow Plug Cold R5
1 Back Plate Unit For Nitro Star BB Series And Force 21/25
1 Gear Set For Back Plate Unit
1 Case For Back Plate Unit
12 Cap Head Screw M2.6x8mm
12 Cap Head Screw M2.6x12mm
6 Set Screw M3x4mm
1427
Z421
Z423