Sierra 18-2760 Exhaust Tube - Replaces Mercruiser 78458A1, Fits Bravo I/II/III 1988 & Newer

The Sierra 18-2760 Exhaust Tube is a machined replacement exhaust tube built for Mercruiser Bravo I, II, and III sterndrives. It directs exhaust flow through the drive unit and is manufactured to meet or exceed the fit, form, and function of the original equipment part it replaces. The tube ships with an 18-7314 clamp included, so the hardware needed for a proper connection is in the box.

This part is designed as a direct interchange for Mercruiser 78458A1 and 78458, as well as GLM 89150 and Mallory 9-72810, giving installers flexibility when sourcing a replacement for aging or corroded exhaust tubes. The exterior finish is machined for a consistent fit against mating exhaust components. At a compact 0.39 x 0.39 x 0.39 inches and 0.38 pounds, it is sized specifically for the Bravo I/II/III exhaust bellows connection point.

Fitment covers Bravo I, II, and III drives from 1988 and newer with serial number 0B664190 and up, as well as Blackhawk drives from 1994-1995 with serial number 0F18677 and up. Confirm the drive serial number range before ordering to ensure correct fitment.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2760
• Product Type: Exhaust Tube
• Weight: 0.38 pounds
• Product Dimensions: 0.39 x 0.39 x 0.39 inches
• Exterior Finish: Machined
• Included Hardware: 18-7314 clamp
• UPC: 030999313003
• Replaces (OEM): Mercruiser 78458A1, Mercruiser 78458, GLM 89150, Mallory 9-72810

Fitment

• Bravo I/II/III, 1988 & Newer, serial number 0B664190 & Up
• Blackhawk, 1994-1995, serial number 0F18677 & Up

Replaces (OEM)

• Mercruiser 78458A1
• Mercruiser 78458
• GLM 89150
• Mallory 9-72810

Frequently Asked Questions

What does the Sierra 18-2760 Exhaust Tube fit? It fits Mercruiser Bravo I, II, and III sterndrives built 1988 and newer with serial number 0B664190 and up, and Blackhawk drives from 1994-1995 with serial number 0F18677 and up.

Is the 18-2760 a genuine Sierra part or aftermarket? The 18-2760 is a Sierra-manufactured replacement part, built to meet or exceed the original equipment exhaust tube it replaces rather than being a Mercruiser-branded OEM part.

Which OEM part numbers does the 18-2760 replace? The Sierra 18-2760 Exhaust Tube is designed to interchange with Mercruiser 78458A1 and 78458, GLM 89150, and Mallory 9-72810.

Does the 18-2760 exhaust tube come with a clamp? Yes, the Sierra 18-2760 ships with an 18-7314 clamp included, so no separate clamp purchase is needed for installation.

How much does the 18-2760 Exhaust Tube weigh? The Sierra 18-2760 Exhaust Tube weighs 0.38 pounds.

What are the dimensions of the 18-2760 exhaust tube? It measures 0.39 x 0.39 x 0.39 inches.

What material or finish does the 18-2760 have? The Sierra 18-2760 has a machined exterior finish.

Will the 18-2760 fit a Bravo drive older than 1988? No, the Sierra 18-2760 is specified for Bravo I/II/III drives from 1988 and newer with serial number 0B664190 and up; drives outside that serial range are not confirmed fitments for this part.

Can the 18-2760 be used on a Blackhawk drive? Yes, the 18-2760 fits Blackhawk drives from 1994-1995 with serial number 0F18677 and up.

Is the 18-2760 covered by a warranty? The Sierra 18-2760 Exhaust Tube is covered under Sierra's standard customer satisfaction warranty that applies to its parts.