Bob's Machine 319-300000-NOPC Transom Wedge, 10 Degree, Reversible, Fits All BIA Bolt Pattern Motors

The Bob's Machine 319-300000-NOPC is a reversible 10 degree transom wedge built to correct trim angle issues on outboard and sterndrive boats. Cast from aluminum for strength and corrosion resistance, this wedge is designed to never crack under the stress of transom mounting loads. It can be installed to provide either positive or negative trim, giving installers flexibility depending on the boat's setup.

In most applications, transom wedges like this one are used to add negative trim when the bow will not come down enough due to the motor's mounting angle. This is a common and effective fix for boats that struggle to plane properly or that fight bow-high running attitudes at low speed. The wedge measures 3 inches in width by 14 inches in total length and is sold as a pair, enough to outfit one engine.

This transom wedge fits all motors with BIA bolt patterns, making it a broadly compatible solution rather than one limited to a specific engine brand. Installation requires longer mounting bolts than stock: for the thicker side of the wedge, bolts need to be 3 inches longer than the originals, and for the thin side of the wedge, bolts need to be 0.50 inch longer. Planning for these longer bolts ahead of installation will make the job go smoothly.

Specifications

• Brand: Bob's Machine
• Manufacturer Part Number: 319-300000-NOPC
• Wedge Angle: 10 degrees
• Trim Type: Reversible, positive or negative
• Material: Cast aluminum
• Width: 3 inches
• Total Length: 14 inches
• Sold As: Pair (for 1 engine)
• Bolt Pattern: BIA
• Installation Note: Requires bolts 3 inches longer on the thick side of the wedge and 0.50 inch longer on the thin side of the wedge
• Weight: 14.3 pounds
• UPC: 818377010894

Fitment

Fits all motors with BIA bolt patterns.

Replaces (OEM)

No OEM cross-reference numbers apply to this part.

Frequently Asked Questions

What angle of trim does the Bob's Machine 319-300000-NOPC transom wedge provide? The 319-300000-NOPC provides 10 degrees of trim, and it can be installed to give either positive or negative trim depending on which way it is mounted.

Will this transom wedge fit my motor? Yes, as long as your motor uses a BIA bolt pattern. The Bob's Machine 319-300000-NOPC transom wedge is designed to fit all motors with BIA bolt patterns rather than one specific engine brand or model.

What is this transom wedge made of? It is constructed of cast aluminum, which Bob's Machine uses so the wedge resists cracking under the mounting stress of the transom.

How many wedges come in a package? The 319-300000-NOPC is sold as a pair, which is enough to outfit one engine.

What are the dimensions of the wedge? Each Bob's Machine 319-300000-NOPC wedge measures 3 inches in width by 14 inches in total length.

Do I need longer bolts to install this wedge? Yes. For the 319-300000-NOPC, you need bolts that are 3 inches longer than stock for the thicker side of the wedge, and bolts that are 0.50 inch longer for the thin side of the wedge.

Why would I need a transom wedge on my boat? Transom wedges are commonly used to add negative trim when a boat's bow will not come down enough due to the mounting angle of the motor, a problem that can cause poor planing and handling at low speed. The 319-300000-NOPC is designed as a fix for this.

Can this wedge be used for positive trim instead of negative trim? Yes, the 319-300000-NOPC is reversible and can be installed to provide either positive or negative trim depending on the orientation needed.

How much does the transom wedge weigh? The Bob's Machine 319-300000-NOPC weighs 14.3 pounds.

Is this a universal part or does it fit specific engine brands only? It is designed to fit all motors that use a BIA bolt pattern, making the 319-300000-NOPC broadly compatible rather than brand-specific.

How is a 10 degree wedge different from a lower-degree version? A 10 degree wedge like the 319-300000-NOPC provides a greater trim correction than a lower-degree wedge, so it is chosen when a boat needs a larger angle adjustment to correct bow-high running or planing issues.