Parts for MerCruiser Race Engine and Drive 420 GM 454 V-8 1987-1989 Thermostat Housing (420)
Reference numbers in this diagram can be found in a light blue row below — scroll down to order.
| # | 27-808730A92 | GASKET SET (1 required per assembly) SN# 0D725500 THRU 0D937011 |
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27-808730A92 - Engine Overhaul Gasket Set [ More info ] Unavailable |
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27-808730A98 - Gasket Set [ More info ] Unavailable |
| # | 27-13218A 1 | GASKET SET (1 required per assembly) SN# 0A398941 THRU 0D725499 |
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27-13218A 1 - Gasket Set [ More info ] Unavailable |
| #1 | 87290A 4 | HOUSING ASSEMBLY, Thermostat (1 required per assembly) SN# 0A398941 THRU 0C576119 |
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87290A 4 - Housing Assembly [ More info ]
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MC-29-87290 - Thermostat Housing [ More info ]
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| #1 | 90736A18 | HOUSING ASSEMBLY, Thermostat (1 required per assembly) SN# 0C576120 & Up |
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90736A18 - Thermostat Housing Assembly [ More info ]
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MC-29-90736 - Thermostat Housing [ More info ]
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| #2 | 23-47511 | SLEEVE, Thermostat Housing (1 required per assembly) |
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23-47511 - Sleeve [ More info ]
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| #3 | 22-32803 | PLUG, Pipe (.375-18) Brass (2 required per assembly) |
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22-32803 - Plug [ More info ] Unavailable |
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228M0180565 - PLUG [ More info ]
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| #4 | 27-53045 1 | GASKET, Thermostat Housing (1 required per assembly) |
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27-53045 1 - Gasket - Priced Individually [ More info ]
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18-2917-9 - Gasket 27-530451 2-Pack [ More info ]
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27-53045Q01 - Gasket [ More info ]
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| #5 | 805273 1 | THERMOSTAT, 140 Degrees (1 required per assembly) |
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805273 1 - Thermostat-140 [ More info ] Unavailable |
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807252 1 - Thermostat-140 [ More info ] Unavailable |
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807252T 1 - Thermostat, 140 Degrees [ More info ] Unavailable |
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8M0089715 - Thermostat, 140 Degrees [ More info ]
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807252Q 4 - Thermostat Kit, 140 Degrees [ More info ]
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18-3551 - Thermostat, 142 Degrees, 807252T1, 59137 [ More info ]
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| #6 | 27-47510 | GASKET, Thermostat (1 required per assembly) |
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27-47510 - Thermostat Gasket [ More info ]
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18-2553-9 - Gasket 27-47510 2-Pack [ More info ]
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| #7 | 23-47508 | SLEEVE (1 required per assembly) |
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23-47508 - Thermostat Sleeve [ More info ] Unavailable |
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23-47508T - Thermostat Sleeve [ More info ]
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| #8 | 27-48818 1 | GASKET, Thermostat Cover (1 required per assembly) |
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27-48818 1 - Gasket - Priced Individually [ More info ]
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| #9 | 47441A 1 | COVER, Thermostat (1 required per assembly) SN# 0A398941 THRU 0C576119 |
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47441A 1 - Thermostat Cover [ More info ]
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18-1977-1 - Thermostat Housing [ More info ]
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MC-29-47441 - Mercruiser Thermostat Housing [ More info ]
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| #9 | 47442A 1 | COVER, Thermostat (1 required per assembly) SN# 0C576120 & Up |
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47442A 1 - Thermostat Cover [ More info ]
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8M0061068 - THERM Cover Housing [ More info ]
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MC-29-47442 - Thermostat Housing [ More info ]
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| #10 | 10-60410 | SCREW, (.375-16 x 4.250) (2 required per assembly) |
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10-60410 - Screw [ More info ]
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| #11 | 12-20553 | WASHER, (.406 x .734 x .063) (2 required per assembly) |
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12-20553 - Washer - Priced Individually [ More info ]
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| #12 | 22-33198A 1 | PLUG, (3/4-14), Pipe (1 required per assembly) |
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22-33198A 1 - Plug [ More info ] Unavailable |
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22-41622 - Pipe Plug [ More info ] Unavailable |
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22-41622 3 - Pipe Plug [ More info ]
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18-4258 - Pipe Plug, 3/4 x 14 [ More info ]
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| #12A | 22-98477A 2 | VALVE ASSEMBLY (1 required per assembly) |
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22-98477A 2 - Valve Assembly [ More info ]
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| #12B | 32-33220 70 | HOSE, (48.00 Inches Bulk), Cut As Required (2 required per assembly) |
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32-33220 70 - Thermostat Housing Exhaust Manifold & Elbow-48IN [ More info ] Unavailable |
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32-8M0062614 - Water Hose [ More info ]
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| #13 | 32-53461 70 | HOSE, (48.00 Inches Bulk), Cut As Required - Water Pump To Oil Cooler (1 required per assembly) |
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32-53461 70 - Hose -48 Inch [ More info ]
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32-865672070 - Hose -48 Inch [ More info ] Unavailable |
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328M0062665 - Hose [ More info ]
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| #14 | 54-18076 6 | CLAMP, Worm Gear (8 required per assembly) |
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54-18076 6 - Clamp [ More info ]
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| #15 | 32-12817 | HOSE, Oil Cooler To Oil Cooler (1 required per assembly) |
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32-12817 - Hose, Oil Cooler To Oil Cooler [ More info ]
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| #16 | 32-12818 | HOSE, Oil Cooler To Tube (1 required per assembly) |
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32-12818 - Molded Hose [ More info ] Unavailable |
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32-848956 - Hose [ More info ] Unavailable |
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328M0171261 - Molded Hose [ More info ]
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| #17 | 22-13177 | TUBE, Water Hose (1 required per assembly) |
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| #18 | 32-64346 | HOSE, Molded, Oil Cooler To Thermostat Housing (1 required per assembly) |
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32-64346 - Molded Hose [ More info ] Unavailable |
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32-896998 - Molded Hose [ More info ]
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| #19 | 32-89718 1 | HOSE, Thermostat Housing To Water Pump (2 required per assembly) |
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32-89718 1 - Molded Hose [ More info ]
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| #20 | 54-18076 9 | CLAMP, Worm Gear (2 required per assembly) |
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54-18076 9 - Clamp, NLA [ More info ]
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| #21 | 32-89749 1 | HOSE, Port - Thermostat Cover To Exhaust Manifold (1 required per assembly) |
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32-89749 1 - Molded Hose [ More info ]
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| #22 | 32-89730 1 | HOSE, Starboard - Thermostat Cover To Exhaust Manifold (1 required per assembly) |
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32-89730 1 - Molded Hose [ More info ]
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| #23 | 54-18076 4 | CLAMP, Worm Gear (4 required per assembly) |
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54-18076 4 - Clamp [ More info ] Unavailable |
