Sierra MerCruiser 3.0 Exhaust Manifold 1990+ 806867A3 860235A03 18-1966 18-1966-1

MerCruiser EXHAUST MANIFOLD by Sierra

Manifold for 3.0 Liter Engines 1990 and Newer using the "MERCARB"

This has a single idle air adjusting screw

Includes:
 • Gaskets
 • Pipe plugs
 • Fuel line
 • Mounting hardware and Instructions

Riser mounting flange is square bolt pattern (2-13/16" x 3-1/16" bolt centers)

Replaces
Mercury: 806867A3, 806867A9, 806867A12 and 815560A5, 815560A7   Replaces OEM NEW PART NUMBER   860235A03 and OLD NUMBER   806867a3   Old Sierra Part Number: 18-1966 superseded to New Sierra Part Number: 18-1966-1

Sierra manifolds are painted, packaged and leak tested.