2018 – 12 Yamaha FX Skimmer Transducer Bracket for Lowrance DSI HDI 4R2C PMA

This is a custom designed and machined Lowrance transducer mounting bracket kit for a 2012-2018 Yamaha FX Waverunner. It has four rows of transducer mounting holes in two columns (4R2C)

Contents of this kit include;

(1) 1/4″ thick PMA transducer mounting plate
(1) black 1/2″ thick marine grade HDPE spacer
(1) black 3/4″ thick marine grade HDPE spacer
(1) PMA double hole one-piece transducer tightening nut with stainless screw thread inserts
(4) stainless steel M8 hex head bolts with lock washers
(2) #10-32 x 3/4″ stainless machine screws with flat washers

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This aluminum transducer mounting bracket fits under the boarding step (between the step bracket and the 1/2″ thick spacer). The plain matte aluminum finish looks great on the ski and will hold up well in fresh water. The kit also comes with a 3/4″ spacer plate that fits under the opposing boarding step bracket. The spacer plates are used to make room for the double hole one-piece nut, prevent the boarding step from being bolted unevenly to the ski, and to prevent scratches by positioning the parts away from the hull.

The M8 stainless steel hex head bolts and lock washers are provided to replace the factory bolts. They are longer to compensate for the thickness of the mounting bracket and to maintain the same factory thread engagement within the inner-hull step ladder flange nuts.

The two #10 stainless steel screws provided are used to hold your Lowrance skimmer transducer onto the bracket. I highly recommend applying marine grade grease or anti-seize to the threads for lubrication and added protection.

Special Note: Be mindful of Waverunners equipped with the RIDE control feature. It is located under the swim deck on the left (port) side of the ski. It will block cables from being routed through the transom on the left side. The cable would have to be routed up and over the swim deck on a left sided installation. On a right sided (starboard) installation, the cable may be routed through the upper transom, or up over the swim deck.

The black marine grade plastic spacers match the factory footprint design of the reboarding step. These foot-printed matched spacers are the only surfaces making contact with the PWC hull. Spacers eliminate any concern for scratching and will give you peace of mind knowing none of the other bracket parts will come in contact with the hull. Please see pictures for reference;

The four row two column matrix of transducer mounting holes allow for fine tuning the up / down elevation of the transducer for optimal bottom tracking.


  • Easy to use
  • Flat design does not require bending for left sided or right sided installation
  • Aesthetically pleasing design, not bulky – no excessive material
  • One piece backing nut with stainless steel threaded hole inserts for mounting the transducer to the bracket allow for one handed loosening and tightening of the transducer screws.
  • Hex nut free design also eliminates the potential for hull scratches
  • One-piece nut design reduces potential for losing small hex nuts in the water during adjustments.
  • One-piece tightening nut is much easier to hold and adjust when compared to small hex nuts.
  • Does not require removal of plastic torsion spring cover on boarding step. Leaving the torsion spring cover on is an overall neater look and maintains the factory appearance
  • Allows direct water temperature readings via transducer if supported by your fish finder unit
  • UV stabilized HDPE does not swell, rot, or delaminate and eliminates galvanic corrosion issues between unlike materials
  • factory foot-printed matched HDPE spacers eliminate concern for scratching transom
  • Simple installation. Completely ready to use out of the shipping package
  • Does NOT require layout and drilling holes for installation. All holes are built into bracket.
  • Pre-drilled holes will save you time and get you on the water fast.
  • No sharp metal corners eliminate cut potential – corners have been deburred for your safety

**Saltwater Recommendations: The cosmetic finish requires proper care if riding in saltwater. Saltwater should be rinsed to prevent breakdown of metals.

2018-12 FX Low 4R2C 750SS 500SS PMA 380 SQ DHN

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Due to the specialized nature of my products (every installation is unique), this item cannot be purchased online. Please use the button below to submit a product information request and I will contact you (usually within 24 hours) to complete your order. 

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Shipping Info

Shipping Info: All parts will be shipped in a heat sealed clear poly package.

No rush U.S.P.S shipping is free within the U.S.A..

No rush shipping has a three day handling time plus shipping transit time.

Priority Express (1 BUSINESS day) shipping will be $25. If you pay extra for Priority Express shipping, then I will have the parts in the mail the next U.S.P.S. BUSINESS day.

International buyers will pay additional shipping cost based on weight and package size.

Refund /Returns

Please note, returns will incur a 25% restocking fee. Buyer is responsible for return shipping costs, label, and tracking info.

I do not issue refunds on any parts that have been mounted, used, damaged, or have missing pieces.

Buyer must contact me prior to return for authorization.


BoonDocksPWC uses the following registered trademarks in product descriptions. These registered trademarks (RTM) are the property of the following companies:

  • GoPro is a RTM of the GoPro Company
  • Garmin is a RTM of Garmin Company
  • RAM Ball is a RTM of the NPI RAM Mount Company
  • Yamaha is a RTM of the Yamaha Company
  • Lowrance is a RTM of the Navico Company
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