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#15201  Nitro Star K4.6 Engine with Pullstart
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New from HPI Racing, the Nitro Star K4.6 engine, capable of propelling the Savage monster truck to speeds of 44 mph and wheelie off the line. The K4.6 is a 4.6cc (.28 cubic inch) big block engine that features a machined billet aluminum heatsink head for extra cooling, dual bushing aluminum connecting rod, true ABC chrome sleeve construction for durability, and a three needle 8.5mm slide carburetor with a composite body for better performance at higher temperatures. The carburetor features a factory re-set line on the high speed needle and "flushed" needles that make re-setting the carb to the baseline factory specifications quick and easy. This powerful new engine has 10% more displacement than our Nitro Star S-25 engine and is rated at 2.9 horsepower! This is a direct bolt-in replacement for the 21BB and S-25 engines; we recommend 17/47 gearing to prevent excessive wheelies. A pullstarter is standard equipment, and the K4.6 is compatible with the #87126 Roto Start System and #87127 Roto Start Backplate.
 
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1


Nitro Star K4.6  
Size 4.6cc (.28cubic inch)
Horsepower @ RPM 2.9 @ 35,000
Maximum RPM 39,000
Bore 18.6mm
Stroke 16.9mm
Construction ABC
Heatsink Head Purple Anodized Machined Aluminum
Carburetor 8.5mm Composite Slide Carb
Carb Adjustments 3 Needle, Flush Settings
Case Silver Aluminum, Rear Exhaust
Connecting Rod Dual Bushing
Sleeve 8 port
Starting system Pullstarter
Recommended Glow Plug #1504 Cold-R5 Power Plug

Number Qty Description EAN Code Price
New Spares
15211 1 CYLINDER/PISTON SET 4944258152110 $80.00
15212 1 CYLINDER/PISTON/CONNECTING ROD SET (ASSEMBLED) 4944258152127 $100.00
15213 1 CONNECTING ROD 49442581521354 $22.00
15214 1 PISTON PIN/RETAINER SET 4944258152141 $6.00
15215 3 RETAINER FOR PISTON PIN (3PCS) 4944258152158 $5.00
15216 1 HEAT SINK HEAD (PURPLE) 4944258152165 $50.00
15219 1 CRANKCASE 4944258152196 $60.00
15222 1 CRANK SHAFT 4944258152226 $45.00
15226 1 PULLSTART ASSY. (W/O ONE-WAY BEARING) 4944258152264 $26.00
15228 1 GASKET SET FOR CYLINDER (0.15mm/0.3mm) 4944258152288 $5.00
15231 1 LOCK PIN SET FOR CARBURETOR 4944258152318 $5.00
15233 1 PULLSTART SHAFT HOLDER (ASSEMBLED) 4944258152332 $22.00
15234 1 STARTING SHAFT 4944258152349 $7.00
15236 1 COVER PLATE SET 4944258152363 $14.00
15237 4 SCREW M3.5X16mm FOR HEATSINK HEAD (4pcs) 4944258152370 $6.00
15241 1 DUST PROTECTION AND O-RING COMPLETE SET 4944258152417 $4.00
15260 1 SLIDE CARBURETOR COMPLETE (TYPE KA/COMPOSITE) 4944258152608 $70.00
15265 1 SLIDE CARBURETOR MAIN BODY (COMPOSITE) 4944258152653 $24.00
15266 1 UNIBALL 4944258152660 $4.00
15268 1 IDLE NEEDLE VALVE WITH O-RINGS 4944258152684 $6.00
15269 1 SLIDE VALVE 4944258152691 $10.00
15271 1 IDLE ADJUSTMENT SCREW WITH O-RING 4944258152714 $4.00
15272 1 FUEL LINE FITTING/WASHER SET 4944258152721 $8.00
15274 1 MAIN NEEDLE VALVE HOLDER 4944258152745 $5.00
15275 1 MAIN NEEDLE WITH O-RING 4944258152752 $5.00
15282 1 FUEL NOZZLE WITH O-RING 4944258152820 $6.00
15285 1 MAIN NEEDLE VALVE SET 4944258152851 $14.00
94154 12 FLAT HEAD SCREW M2.6x8mm (HEX SOCKET/12pcs) 4944258941547
Existing Spares
1504 1 GLOW PLUG COLD R5 4944258015040 $6.00
86077 1 COLLET 7x6.5mm (BRASS/21 SIZE/2pcs) 4944258860770 $4.00
87198 1 AIR CLEANER (21+ SIZE) 4944258871981 $10.00
87199 1 AIR CLEANER SLEEVE SET (FOR #87198) 4944258871998 $5.00
87204 1 AIR CLEANER FOAM ELEMENT SET (FOR #87198) 4944258872049 $6.00
Z542 12 CAP HEAD SCREW M3x8mm (12pcs) 4944258955414
Z700 6 SET SCREW M3 x 3mm (6 pcs) 4944258007007 $2.00
Existing Options
1502 1 GLOW PLUG MEDIUM R3 4944258015026 $6.00
1503 1 GLOW PLUG MEDIUM COLD R4 4944258015033 $6.00
72175 1 HIGH PERFORMANCE AIR CLEANER (10mm) 4944258721750 $16.00

Now available.
HPI has shipped this to our distributors and you should already see it in stores.
Kit
Standard Part
Option Part
Accessory
Savage 21 RTRThis part is a factory upgrade for this kit.  It does not come standard.  All HPI upgrades are built for durability, look, and overall performance improvement.
Savage 25 RTRThis part is a factory upgrade for this kit.  It does not come standard.  All HPI upgrades are built for durability, look, and overall performance improvement.
Savage SSThis part is a factory upgrade for this kit.  It does not come standard.  All HPI upgrades are built for durability, look, and overall performance improvement.
Savage Limited EditionThis part is a factory upgrade for this kit.  It does not come standard.  All HPI upgrades are built for durability, look, and overall performance improvement.
Savage XThis part is a factory upgrade for this kit.  It does not come standard.  All HPI upgrades are built for durability, look, and overall performance improvement.
Savage X SSThis part comes standard with this kit. You can buy this part as a replacement if needed.
Savage X 4.6 RTRThis part is a factory upgrade for this kit.  It does not come standard.  All HPI upgrades are built for durability, look, and overall performance improvement.
Savage 4.6This part comes standard with this kit. You can buy this part as a replacement if needed.
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