Description
Overview:
The Crankcase for Husqvarna 385 and 390XP chainsaws, Manufacturer Part Number (MPN) 503 99 11 05, is a Genuine Husqvarna OEM engine housing. Built from high-strength, die-cast magnesium alloy, it provides a rigid, heat-resistant base that supports the crankshaft, bearings and seals while protecting the internal engine components. Precision-machined faces ensure an airtight seal between the crankcase halves, helping maintain correct crankcase pressure for reliable starting, power and lubrication. Designed specifically for the Husqvarna 385, 385XP and 390XP professional saws, this replacement crankcase restores structural integrity after impact damage, wear or thread failure. It is suitable for trade users and serious DIY owners who need dependable performance in heavy-duty cutting, forestry, site clearance and firewood work.
Key Features:
- Genuine Husqvarna OEM part for assured fit and performance
- Direct fit for Husqvarna 385, 385XP and 390XP chainsaws
- Die-cast magnesium alloy body: strong, lightweight and heat resistant
- Precision-machined mating faces for a secure, airtight crankcase seal
- Correctly located mounts for cylinder, oil pump, chain brake and AV buffers
- Supports accurate crankshaft alignment to minimise vibration and wear
- Resistant to fuel, oil and exhaust heat for long service life
- Engineered to accept OEM bearings, seals and fasteners (not included)
- Restores engine integrity after case damage, stripped threads or fatigue
- Suitable for professional forestry, arborist and heavy firewood use
Typical Applications:
Used as the main engine housing on Husqvarna 385/385XP/390XP saws. Ideal when rebuilding engines, replacing damaged crankcases, or during major overhauls to resolve air leaks, misalignment or cracked mounts. Common in forestry, felling, logging, milling setup work, grounds maintenance and firewood processing where durability and reliability are essential.
Also known as:
Chainsaw crankcase, engine housing, crankcase halves, lower engine case, magnesium crankcase, 385/390XP crankcase assembly. Frequently referenced as a Husqvarna OEM engine case in workshop manuals and rebuild kits.
Fits Models:
385, 385XP, 390XP
Alternate Part Numbers:
503 99 11-05, 503991105, 503-99-11-05, 503 99 11 05
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