MerCruiser V8 Log Spacer Blocks 3 Inch MC-20-61851A2 

Manifold to riser 3" spacers (sold in pairs).

Replaces MerCruiser 61851A2, Osco 1851 (single), Mallory 9-40532 and GLM 50330.

Fits these applications:

• MerCruiser V8 198, 228, 255, 260 and 898, inboard and stern drive units (log style direct replacement).
• MerCruiser V8 (Ford) 302 and 351 C.I.D., Models 188, 215, 225, 233, 255 and 888 inboard and I/O units (log style direct replacement).

Barr Marine castings have a thicker interior wall, are painted to match original manufacturer colors and are packed in foam for added protection during shipping and storage.

• Includes all mounting hardware, gaskets and drain plugs.
• Each spacer block kit includes the spacer block(s) and the corresponding package to mount.

Compatible parts:

• MC-1-65603 direct replacement water cooled exhaust manifold (starboard side).
• MC-1-65604 direct replacement water cooled exhaust manifold (port side).
• MC-1-77234 direct replacement water cooled exhaust manifold (port side).
• MC-1-77235 direct replacement water cooled exhaust manifold (starboard side).
• MC-20-60426 direct replacement exhaust elbow riser (utilizes a stainless steel sleeve at the water/air mixing area).
• MC-20-76351 direct replacement exhaust elbow riser.
• MC-20-76771 direct replacement exhaust elbow riser.
• 1-60252 direct replacement exhaust manifold end cap/connector.
• 1-60252P front end plate mounting package.
• MC-1-6560P manifold mounting package.
• MC-1-77234P manifold mounting package.
• MC-20-55730 stainless steel fresh water cooling block off plate for use with MerCruiser riser #'s 60426, 76351 and 76771. Requires (2) gaskets part # MC47-27-52076.
• MC-20-60207 stainless steel block off plate (with vent hole) for use with MerCruiser riser #'s 60426, 76351 and 76771. Requires (2) gaskets part # MC47-2752076.
• MC-20-60426P exhaust riser elbow mounting package. For use with both MC-2060426 and MC-20-76351 risers.
• MC-27-48104 alternator mounting bracket.
• MC-29-47441 upper thermostat housing.
• MC-29-62898 upper thermostat housing.
• MC-29-63588 lower thermostat housing.
• MC-29-78984 lower thermostat housing.
• MC47-27-33395 direct replacement exhaust manifold to head gasket.
• MC47-27-33395A2 exhaust manifold gasket set.
• MC47-27-48043 direct replacement exhaust manifold end cap/connector gasket (will fit both ends).
• MC47-27-73866 direct replacement exhaust manifold to head gasket.
• MC47-27-99777-3 direct replacement exhaust elbow to manifold gasket.
• MC47-488 KIT thermostat kit (includes gasket and thermostat).

Manufactured by Barr Marine. Part number MC-20-61851A2.