Center Riser Spacer Block 3 Inch with Hardware 

3" spacer block (complete with mounting hardware, gasket and 3/4" pipe plug).

Replaces Osco 994-S3, Mallory 9-40130 and GLM 56030.

Fits these applications:

• Chris-Craft V8 283, 302, 305, 307, 327 and 350 C.I.D., all models (center riser generic).
• Chris-Craft V8 454 C.I.D., all models (center riser generic).
• Crusader V8 283, 302, 305, 307, 327 and 350 C.I.D., all models (center riser generic).
• Crusader V8 427 and 454 C.I.D., all models (center riser generic).
• Crusader V8 302 and 351 C.I.D., all models (center riser generic).
• Flagship V8 283, 327 and 350 C.I.D., all models (center riser generic).
• Indmar V8 283, 305, 307, 327 and 350 C.I.D., all inboard models (center riser generic).
• Indmar V8 427 and 454 C.I.D., all inboard models (center riser generic).
• Indmar V8 302 and 351 C.I.D., all inboard models (center riser generic).
• Interceptor V8 221, 260, 289, 302 and 351 C.I.D., all models (center riser generic).
• MerCruiser V8 283, 302, 305, 307, 327 and 350 C.I.D., all models (center riser generic).
• MerCruiser V8 454 and 502 C.I.D., all models (center riser generic).
• MerCruiser V8 (Ford) 302 and 351 C.I.D., all models (center riser generic).
• OMC V8 283, 302, 305, 307 and 350 C.I.D., all models (center riser generic).
• OMC (Ford) V8 302 and 351 C.I.D., all models (center riser generic).
• PCM V8 302 and 351 C.I.D., all years (center riser generic).
• Volvo V8 307 and 350 C.I.D., all models (center riser generic).
• Waukesha V8 302 and 351 C.I.D., all years (center riser generic).

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.

• Capable of stacking.

Compatible parts:

• CHV-1-83 water cooled center discharge manifold to fit the small block GM engine (3/4" N.P.T. cooling hose connections). All years.
• CHVA-1-84 water cooled center discharge manifold to fit the big block GM engine (3/4" N.P.T. cooling hose connections). All years.
• FM-1-83 water cooled center discharge manifold to fit the small block Ford engine (3/4" N.P.T. cooling hose connections). All years.
• 20-0082 water cooled center discharge riser (3/4" N.P.T. cooling hose connection). Standard for use with 3" I.D. exhaust hose.
• 20-0100 water cooled center discharge riser (3/4" N.P.T. cooling hose connection). Standard for use with 4" I.D. exhaust hose.
• 20-0102 water cooled center discharge riser (3/4" N.P.T. cooling hose connection).
• 1-0104P adaptor package for fresh water cooled manifold (includes gaskets and block off plate).
• 1-0105 center riser manifold-to-riser gasket for fresh water cooling.
• 1-0106P adaptor package for raw water cooling. Used in pre-heating applications (includes gaskets and block off plate with vent hole).
• 1-0107 center riser manifold-to-riser gasket (raw water cooling).
• 20-0082P riser mounting package for both 20-0082 and 20-0100.
• 20-0082SS P stainless steel mounting package (with brass plugs) for both 20-0082 and 20-0100.
• 20-0084P straight exhaust adaptor (includes adaptor, hose and clamps). For use with 3 1/2" I.D. exhaust hose.
• 20-0085P straight exhaust adaptor (includes adaptor, hose and clamps). For use with 2 1/2" I.D. exhaust hose.
• 20-0086P 90 degree exhaust elbow adaptor (includes adaptor, hose and clamps). For use with 2 1/2" I.D. exhaust hose.
• 20-0087P 90 degree exhaust elbow adaptor (includes adaptor, hose and clamps). For use with 3" I.D. exhaust hose.
• 20-0088P 30 degree exhaust elbow adaptor (includes adaptor, hose and clamps). For use with 2 1/2" I.D. exhaust hose.
• 20-0089P 30 degree exhaust elbow adaptor (includes adaptor, hose and clamps). For use with 3" I.D. exhaust hose.
• 20-0092P 45 degree exhaust elbow adaptor (includes adaptor, hose and clamps). For use with 3" I.D. exhaust hose.
• 20-0093P 90 degree exhaust elbow adaptor (includes adaptor, hose and clamps). For use with 3 1/2" or 4" I.D. exhaust hose.
• CHV-1-83P manifold mounting package (includes bolts and pipe plugs).
• CHV-1-83SS-P stainless steel manifold mounting package (includes stainless bolts and brass plugs).
• CHV-27-0083 alternator bracket. Use where engine water pump is mounted on port side of engine below alternator.
• CHV-47-0000 manifold to cylinder head gasket.
• CHVA-1-84P manifold mounting package (includes bolts and pipe plugs).
• CHVA-1-84SS-P stainless steel manifold mounting package (includes stainless bolts and brass plugs).
• CHVA-47-0000 manifold to cylinder head gasket.
• FM-1-83P manifold mounting package (includes bolts and pipe plugs).
• FM-1-83SS-P stainless steel manifold mounting package (includes stainless bolts and brass plugs).
• FM-47-0000 manifold to cylinder head gasket.
• MC-27-47487 alternator bracket.
• MC-45-0000 fuel filter and solenoid universal mounting bracket.
• MC-45-0002 fuel filter/solenoid bracket.
• MC-6-0001P exhaust manifold plumbing fittings package for model 215.
• OMC-20-0000P hook up package; may be required for connection to stern drive units (exhaust hose and clamps not included).
• OMC-20-0003 hose bushing 3" to 3 1/2" (where applicable).

Manufactured by Barr Marine. Part number 20-0097.