If you want a dedicated tool to mix and measure oil ratios for your entire fleet of lawn equipment, choose FLIKOU 2-Cycle; if you need a specific replacement engine part for a Husqvarna chainsaw to restore its lubrication system, choose ZYNSWANGM Oil Assembly Fit. These two items solve completely different problems, yet they both sit in the same category of two-stroke maintenance. I see people often confuse them because the keywords overlap around "oil" and "2-cycle," but mixing them up leads to buying a measuring bottle when you actually need an internal engine component, or vice versa. One is an accessory for your garage workbench, while the other is a critical mechanical piece inside your saw.
• FLIKOU 2-Cycle: Its biggest strength is accurate ratio measurement for all your outdoor power tools, but it is just a container and does not perform any mechanical function itself.
• ZYNSWANGM Oil Assembly Fit: Its biggest strength is restoring proper lubrication flow in specific Husqvarna models like the 50, 51, and 55, but it is useless unless you own one of those exact machines.
• The FLIKOU pick is for homeowners who maintain multiple pieces of equipment and want to stop guessing their fuel mixes.
• The ZYNSWANGM pick is for owners of specific Husqvarna chainsaws facing low oil pressure or a broken pump assembly.
The FLIKOU 2-Cycle is designed as a practical measuring bottle for anyone who keeps a workshop or garden shed stocked with chainsaws, string trimmers, leaf blowers, and edgers. Its primary purpose is to eliminate guesswork during the seasonal preparation of these machines. You do not pour oil directly from a large jug into your gas can; that method often leads to over-saturation or under-lubrication, which can ruin expensive engines. This bottle provides clear ratio reference markings that let you see exactly how much oil goes into your fuel mixture. It is supplied empty, so you fill it with the oil you have on hand, check the markings, and then add the corresponding amount of gasoline.
This product fits best for the DIY homeowner or the professional landscaper who runs a variety of 2-cycle equipment. If you own a Husqvarna, a Stihl, or a generic brand of weed whacker, this bottle works with all of them because it is not tied to a single engine model. The design is compact, measuring roughly 6.57 x 6.3 x 6.3 inches, which makes it easy to stash on a shelf or in a toolbox without taking up valuable space. It is lightweight and made to be read at a glance, helping you get the mix right every time.
However, you should skip this item if you are looking for a replacement part for a broken machine. This bottle has no moving parts, no gears, and no internal mechanism to pump oil. It is purely a vessel for holding liquid. If your chainsaw is running rough because the oil pump has failed or the assembly is clogged, this bottle will not fix the problem. It is a maintenance aid, not a repair part. If you already have a reliable way to measure your oil, or if you only use electric tools that require no oil mixing, this item might just collect dust on your shelf.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-11-08 · 7 min read · Independent comparison
The ZYNSWANGM Oil Assembly Fit serves a very narrow but critical function: it replaces the original equipment manufacturer (OEM) oil pump assembly for specific Husqvarna chainsaw models. This includes the 50, 51, and 55 series, as well as the Rancher EU1. When these machines experience issues with oil delivery, such as starving the bar and chain of lubrication or failing to auto-feed oil correctly, this assembly is the solution. It is engineered specifically for 2-stroke power systems, ensuring that the engine receives consistent lubrication even under demanding cutting conditions. Without a functioning assembly, the friction between the piston and cylinder increases, leading to rapid wear or catastrophic engine failure.
This part is essential for anyone whose specific Husqvarna saw has stopped delivering oil to the guide bar. It is designed to replace the OEM part number 503660102, making it a direct fit for repairs. The construction is built to meet rigorous standards for durability, which matters when you are working with heavy-duty cutting tasks where reliability is non-negotiable. It ensures that the oil flows smoothly from the tank to the chain, protecting the engine longevity and maintaining smooth operation. If your saw is running hot or the chain is smoking because it is dry, this is the component you need to address the root cause.
You should only consider this purchase if you own one of the listed compatible models. The dimensions are extremely small, roughly 0.39 x 0.39 x 0.39 inches, indicating it is an internal component rather than an external accessory. If you have a different brand of chainsaw, or a different Husqvarna model not listed here, this part will not fit. It is not a universal adapter. Furthermore, if your issue is simply that you are out of oil or you cannot find a good measuring cup, this assembly will not help. It is a mechanical replacement part that requires installation knowledge to swap out the old unit. It is not for general storage or mixing.
• Best for measuring fuel mixes across multiple brands → FLIKOU 2-Cycle.
• Best for repairing a specific Husqvarna 50, 51, or 55 chainsaw → ZYNSWANGM Oil Assembly Fit.
• Best for users who want to prevent engine damage through correct ratios → FLIKOU 2-Cycle.
• Best for users dealing with immediate oil pump failure → ZYNSWANGM Oil Assembly Fit.
• Best for storing on a workbench without taking up much room → FLIKOU 2-Cycle.
• Best for restoring factory performance to a specific engine model → ZYNSWANGM Oil Assembly Fit.
• Best for a versatile tool used by landscapers with diverse fleets → FLIKOU 2-Cycle.
• Best for a targeted fix for a single machine requiring OEM replacement → ZYNSWANGM Oil Assembly Fit.
The choice comes down to whether you are trying to manage fluids or manage machinery. The FLIKOU bottle helps you manage the fluids that go into the machine, ensuring the chemistry is correct before you even start the engine. The ZYNSWANGM part manages the fluid once it is inside the machine, ensuring the physical delivery system is working. They operate at opposite ends of the maintenance lifecycle. One prepares the fuel; the other fixes the engine's ability to feed oil.
For city driving scenarios where you might be commuting to job sites or using tools in urban residential areas, having the right tool for the job is vital. If you are heading out to cut hedges or trim trees in a neighborhood setting, you likely need to prep your equipment beforehand. In this case, the FLIKOU bottle ensures you don't ruin your trimmer with a bad mix. However, if you are fixing a neighbor's saw or doing your own maintenance on a specific Husqvarna unit in a driveway, the ZYNSWANGM part is the necessary hardware to get that machine back on the road.
In my opinion, the FLIKOU 2-Cycle is the more universally useful item for the average owner of outdoor power equipment. It addresses a common mistake—imprecise mixing—that can destroy any 2-cycle engine, regardless of the brand. While the ZYNSWANGM part is excellent for its specific application, it is too niche to recommend unless you have confirmed your chainsaw model matches exactly. I would buy the FLIKOU bottle first because it prevents problems before they happen, whereas the ZYNSWANGM part is a reactive repair. For city driving and regular yard work, prevention is always better than cure, and this bottle is the key to preventing fuel-related failures.
Yes, the FLIKOU 2-Cycle measures oil ratios generally, making it suitable for chainsaws, trimmers, and blowers from various manufacturers, provided you know the correct oil-to-gas ratio for your specific engine.
No, the ZYNSWANGM Oil Assembly Fit is specifically designed for Husqvarna 50, 51, 55, and Rancher EU1 models and will not fit other brands like Stihl or Echo.
The bottle is designed for measuring and mixing, but since it is a plastic container with a cap, it can hold oil temporarily; however, it is primarily intended for the active process of preparing fuel mixes.
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