Engine

LCT 414cc snow engine: oil, spark plug and air filter

Last checked October 1, 2026

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Engine oil	`SAE 5W-30`	Search Amazon for SAE 5W-30 oil
Spark plug	Torch `F6RTC`Gap 0.027-0.030 in	Search Amazon for F6RTC
Displacement	414 cc
Fuel	Unleaded regular gasoline, up to 10% ethanol

Machines with this engine

Sources

Operator's Manual ST 330T (dated 06/17/2014 on its last page): cover E10 statement, page 3 product specifications, Husqvarna, form 115 68 31-27, Revision not printed in the text copy
Husqvarna ST 330 T (961930095-01, 2014-06) ENGINE diagram: VALVE.COVER.LCT.414CC, CRANKSHAFT KEYED #18 LCT 414C, FUEL TANK ASSY 414C LCT, KIT.ENGINE GASKET.LCT.414CC, Husqvarna IPL data (dealer copy, PartsTree), MFG revision -01
LCT Snow Engine 136cc / 179cc / 208cc / 254cc / 291cc / 414cc Series Operation Manual (footer 'ARIENS GEN II ... Snow Engine Manual', rev. 01/09/13): printed page 10 fuel, page 11 oil recommendations and capacities, page 12 spark plug, LCT, form PGM45008, cover 04/15/15 rev A, EU; inside pages rev. 01/09/13 (an edition of Ariens PGH45297, the same manual)
LCT Engine Service Manual: 79, 136, 179, 208, 254, 291, 306, 369, 414 & 420cc (printed page 5 specifications, 414cc column; printed page 10 spark plug service), LCT, form PGM45015, 12/04/17 rev G