Overview
1 kW The M135M’s medium frequency delivers the right combination of coverage under the boat, extended depth range, and the ability to produce clean and accurate target and structure returns in mid to deeper water.
Medium frequency also delivers excellent shallow to mid-depth performance, bottom detail, and fish-target separation.
Operating at a frequency range of 85 to 135 kHz, this transducer reveals fish at medium depths up to 457 m (1500′) and gives ultra-clear target resolution. Airmar’s M135M includes a plastic mounting base which is aligned to the centerline and secured inside the hull. Then it is filled with non-toxic antifreeze.
The transducer is inserted into the base and adjusted for the proper deadrise offset, ensuring the beam is shooting straight down for maximum echo returns. The eco-friendly coolant is the best medium to transmit through solid fiberglass and into the surrounding water.
The major benefit of an in-hull transducer is no protruding features on the exterior of the hull, making it the perfect choice for trailered or lifted boats. Designed for smaller boats up to 11 m (36′) with a solid-fiberglass hull. This transducer is available in two options: one with an OEM connector designed specifically for your fishfinder, and another as a Mix and Match™ Transducer version.
The Mix and Match™ transducer has a 9-meter (29.5’) cable with a standard connector, plus a 1-meter (3’) adapter cable to connect it to your fishfinder. When placing your order, make sure you know which connector type your fishfinder requires.
Technical specifications
| Acoustic Window | Urethane |
|---|---|
| Common Use | Leisure/Yachting, Fishing |
| Frequency | Medium |
| Functions | Depth |
| Housing | Plastic |
| Hull Material | Solid fiberglass only |
| Max Deadrise | Up to 22° |
| Max Deadrise Angle | 22° |
| Max Depth | 457 m (1500′) |
| Max Vessel LOA | Up to 11 m (36′) |
| Medium Frequency | 85-135 Khz |
| Medium Frequency Beamwidth | 16°-11° |
| Mounting Style | In-Hull |
| Power Rating | 1 kW |
| Product Family | Marine |
| Retractable housing | No |
| Single or Dual Frequency | CHIRP-Ready Single-Band |
| Tilted Element | No |
| Weight | 4.2 kg (9.2 lb.) |
FAQs
Does the M135M require drilling through the hull for installation?
No, the M135M installs entirely inside the hull, avoiding any protrusions or holes below the waterline.
How is the mounting base aligned during installation?
The plastic mounting base is aligned to the centerline and secured inside the hull.
How is the deadrise angle adjusted during installation?
After inserting the transducer into the base, adjust for deadrise offset to ensure it shoots straight down for best echo returns.
How is the M135M installed inside the hull?
The M135M uses a plastic mounting base that aligns to the centerline and is secured inside the hull, then filled with non-toxic antifreeze before inserting and adjusting the transducer for proper deadrise offset.
What liquid is used with the in-hull mounting base?
The mounting base is filled with non-toxic antifreeze as the medium for transmission.
What connector should I order for my fishfinder?
You must know which connector type your fishfinder requires when ordering.
What type of hull is required for the M135M In-hull transducer?
It is designed specifically for solid fiberglass hulls only.
What size of boat is this in-hull transducer designed for?
It is designed for smaller boats up to 11 m (36′) in length.
Who do I contact for help with installation, servicing or advice?
Contact the SailRACE team — as certified marine experts we’re happy to help with product selection, installation and after-sales servicing, before and after your purchase.
Variant selection
Select the reference, connector and configuration that match your equipment. The options below identify the variants available in this listing.
- M135M F1 — Furuno F1
- M135M F2 — Furuno F2
- M135M H1 — Humminbird H1
- M135M H2 — Humminbird H2
