Description
Overview:
This Mounting Bottom is a genuine Masport component for walk-behind lawn mowers, designed to restore and maintain structural support in the lower mounting area of the machine. Built from durable moulded polymer in a black finish, it resists weathering and corrosion and helps control vibration under regular use. The part locates and secures adjoining brackets and fasteners, keeping chassis components correctly aligned for smooth operation. It is engineered for the Masport RR18 and RR18SP ranges and manufactured to factory tolerances for a precise fit. As a direct replacement for OEM No. MA557055, it offers straightforward maintenance with reliable long-term performance, making it suitable for routine servicing or repair when the original mounting base shows wear, cracking, or distortion.
Key Features:
- Genuine Masport part for assured compatibility and quality
- Direct replacement for OEM No. MA557055 for an exact fit
- Robust moulded polymer construction for durability and impact resistance
- Corrosion-resistant material suited to wet grass and outdoor storage
- Preformed bosses and mounting holes align with original chassis points
- Helps maintain deck and handle alignment to reduce vibration and wear
- Straightforward installation using standard hand tools; no modification typically required
- Designed for long service life under regular domestic or commercial mowing
Typical Applications:
Used to replace a damaged or worn lower mounting base during mower servicing. Common when repairing impact damage, resolving excessive play or vibration, or completing a deck or drive system rebuild. Suitable for ongoing maintenance to keep Masport mowers running smoothly and to protect associated components from premature wear.
Also known as:
Mounting base, lower mounting plate, base plate, chassis mounting bottom, mower frame mount, mower mounting base. These terms refer to the same lower support component that secures and aligns parts within the mower's chassis assembly.
Fits Models:
Oxford 48RS, RR18, RR18SP, RR18SP ES, RR18SP H, RR18SP IN, RR18SP L, RR18SPH, RR18SPL
Product Specifications
| L&S Part No. | MA557055 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Masport |
| OEM No. | MA557055 |
| Unit of Sale | 1 |
| Applications | Oxford 48RS, RR18, RR18SP, RR18SP ES, RR18SP H, RR18SP IN, RR18SP L, RR18SPH, RR18SPL |
| Machine Type | Mowers |
| Fits Brands | Masport |
| Fits Models | RR18 (2016 Mar 457949) | RR18SP (2015 Oct 457950) | RR18SP H (2011 Sep 457945) | RR18SP IN (2016 Nov 457954) | RR18SP L (2018 Sep 457958) | RR18SP ES (2012 Aug 457947) | Oxford 48RS (2015 Dec 457952) |
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