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Parts for MerCruiser Race Engine and Drive 420 GM 454 V-8 1987-1989 Thermostat Housing (425)

Engine Diagram

Ref. No. Part No. Description Manufacturer List Price Your Price Order
#1 90736A18 HOUSING ASSEMBLY, Thermostat (1 required per assembly)
HOUSING ASSEMBLY 90736A18 90736A18
90736A18OEM Part 90736A18 - Thermostat Housing Assembly (more info) About Mercury Marine $317.08 $317.08 Add to shopping cart
Available to order:
Usually ships
within 8 days
T-STAT HOUSING MC-29-90736 MC-29-90736
MC-29-90736OEM Match MC-29-90736 - Thermostat Housing (more info) About Barr Marine by EDM $175.00 $136.67 Add to shopping cart
Available to order:
Usually ships
within 8 days
#2 23-47511 SLEEVE, Thermostat Housing (1 required per assembly)
SLEEVE 23-47511 23-47511
23-47511OEM Part 23-47511 - Sleeve (more info) About Mercury Marine $30.58 $30.58 Add to shopping cart
7 in stock. Explain stock levels
#3 22-32803 PLUG, Pipe (.375-18) Brass (2 required per assembly)
PLUG Pipe (.375-1 22-32803 22-32803
22-32803OEM Part 22-32803 - Plug (more info) About Mercury Marine $4.70 $4.70 Add to shopping cart
3 in stock. Explain stock levels
Pipe Plug, 3/8-18 Npt Pipe 18-4264
18-4264OEM Match 18-4264 - Pipe Plug, 3/8-18 NPT Pi (more info) About Sierra Marine $3.99 $3.41 Add to shopping cart
Available to order:
Usually ships
within 8 days
#4 27-53045 1 GASKET, Thermostat Housing (1 required per assembly)
GASKET Note: must be ordered in multiples of 5 27-53045  1 27-53045 1
27-53045 1OEM Part 27-53045 1 - Gasket - Priced Individually (more info) About Mercury Marine $3.70 $3.70 Add to shopping cart
10+ in stock. Explain stock levels
Thermostat Gasket 18-2917-9
18-2917-9OEM Match 18-2917-9 - Gasket 27-530451 2-Pack (more info) About Sierra Marine $5.98 $3.65 Add to shopping cart
10+ in stock. Explain stock levels
GASKET   27 53045Q01 27-53045Q01
27-53045Q01OEM Part 27-53045Q01 - Gasket (more info) About Mercury Marine $3.90 $3.90 Add to shopping cart
Available to order:
Usually ships
within 8 days
#5 805273 1 THERMOSTAT, 140 Degrees (1 required per assembly)
THERMOSTAT-140    O - Replaced by -807252  1  
805273 1This part has been superseded. THERMOSTAT-140 O - Replaced by -807252 1
(more info)
    UnavailableUnavailable Parts
THERMOSTAT-140    O - Replaced by -807252T 1 807252  1
807252 1This part has been superseded. THERMOSTAT-140 O - Replaced by -807252T 1
(more info)
    UnavailableUnavailable Parts
8M0089715 807252T 1 807252T 1
807252T 1OEM Part 807252T 1 - Thermostat -140 (more info) About Mercury Marine $17.59 $17.59 Add to shopping cart
1 in stock. Explain stock levels
THERMOSTAT 60 Deg 8M0089715 8M0089715
8M0089715OEM Part 8M0089715 - Thermostat-140 (more info) About Mercury Marine $18.75 $18.75 Add to shopping cart
Available to order:
Usually ships
within 8 days
THERMOSTAT KIT     807252Q 4 807252Q 4
807252Q 4OEM Part 807252Q 4 - Thermostat Kit (more info) About Mercury Marine $40.66 $40.66 Add to shopping cart
Available to order:
Usually ships
within 8 days
Thermostat (140) 18-3551
18-3551OEM Match 18-3551 - Thermostat 807252T1, 59137 (more info) About Sierra Marine $14.99 $11.08 Add to shopping cart
9 in stock. Explain stock levels
#6 27-47510 GASKET, Thermostat (1 required per assembly)
GASKET Note: must be ordered in multiples of 2 27-47510 27-47510
27-47510OEM Part 27-47510 - Gasket - Priced Individually (more info) About Mercury Marine $2.40 $2.40 Add to shopping cart
2 in stock. Explain stock levels
Gasket 18-2553-9
18-2553-9OEM Match 18-2553-9 - Gasket 27-47510 2-Pack (more info) About Sierra Marine $4.98 $3.01 Add to shopping cart
Available to order:
Usually ships
within 8 days
#7 23-47508 SLEEVE (1 required per assembly)
SLEEVE-THERMOSTAT O - Replaced by 23-47508T  
23-47508This part has been superseded. SLEEVE-THERMOSTAT O - Replaced by 23-47508T
(more info)
    UnavailableUnavailable Parts
SLEEVE 23-47508T 23-47508T
23-47508TOEM Part 23-47508T - Thermostat Sleeve (more info) About Mercury Marine $12.83 $12.83 Add to shopping cart
10+ in stock. Explain stock levels
#8 27-41812 2 GASKET, Thermostat Cover (1 required per assembly)
GASKET 27-41812  2 27-41812  2
27-41812 2OEM Part 27-41812 2 - Gasket (more info) About Mercury Marine $8.66 $7.02 Add to shopping cart
10+ in stock. Explain stock levels
#9 47442A 1 COVER, Thermostat (1 required per assembly)
8M0061068 NEW TAKE-OFFS 47442A 1 47442A 1
47442A 1OEM Part 47442A 1 - Thermostat Cover (more info) About Mercury Marine $35.00 $35.00 Add to shopping cart
1 in stock. Explain stock levels
THERM COVER HSG 8M0061068  
8M0061068OEM Part 8M0061068 - THERM Cover Housing (more info) About Mercury Marine $82.92 $82.92 Add to shopping cart
Available to order:
Usually ships
within 8 days
T-STAT HOUSING MC-29-47442 MC-29-47442
MC-29-47442OEM Match MC-29-47442 - Thermostat Housing (more info) About Barr Marine by EDM $36.00 $28.12 Add to shopping cart
2 in stock. Explain stock levels
#10 10-60410 SCREW, (.375-16 x 4.250) (2 required per assembly)
SCREW (.375-16 x 10-60410 10-60410
10-60410OEM Part 10-60410 - Screw (more info) About Mercury Marine $4.10 $4.10 Add to shopping cart
1 in stock. Explain stock levels
#11 12-20553 WASHER, (.406 x .734 x .063) (2 required per assembly)
WASHER (.406 x .7 12-20553  
12-20553OEM Part 12-20553 - Washer - Priced Individually (more info) About Mercury Marine $1.10 $1.10 Add to shopping cart
Available to order:
Usually ships
within 8 days
#12 22-98477A 2 VALVE ASSEMBLY (1 required per assembly)
VALVE ASSEMBLY 22-98477A 2 22-98477A 2
22-98477A 2OEM Part 22-98477A 2 - Valve Assembly (more info) About Mercury Marine $72.75 $72.75 Add to shopping cart
Available to order:
Usually ships
within 8 days
#13 32-53461 70 HOSE, (48.00 Inches Bulk), Cut As Required - Water Pump To Oil Cooler (1 required per assembly)
32865672070 32-53461 70 32-53461 70
32-53461 70OEM Part 32-53461 70 - Hose -48 Inch (more info) About Mercury Marine $64.45 $64.45 Add to shopping cart
8 in stock. Explain stock levels
HOSE-48 INCH       - Replaced by 32-8M0062665 32-865672070
32-865672070This part has been superseded. HOSE-48 INCH - Replaced by 32-8M0062665
(more info)
    UnavailableUnavailable Parts
HOSE (48.00 Inche 32-8M0062665 328M0062665
328M0062665OEM Part 328M0062665 - Hose (more info) About Mercury Marine $67.17 $67.17 Add to shopping cart
Available to order:
Usually ships
within 8 days
Molded Hose 18-75125
18-75125OEM Match 18-75125 - Straight Hose (more info)
Replaces OEM #0912793
About Sierra Marine $36.99 $29.83 Add to shopping cart
Available to order:
Usually ships
within 8 days
#14 54-18076 6 CLAMP, Worm Gear (8 required per assembly)
CLAMP Worm Gear 54-18076  6  
54-18076 6OEM Part 54-18076 6 - Clamp (more info) About Mercury Marine $10.50 $10.50 Add to shopping cart
Available to order:
Usually ships
within 8 days
#15 32-12817 HOSE, Oil Cooler To Oil Cooler (1 required per assembly)
HOSE 32-12817 32-12817
32-12817OEM Part 32-12817 - Hose (more info) About Mercury Marine $39.96 $39.96 Add to shopping cart
Available to order:
Usually ships
within 8 days
#16 32-12818 HOSE, Oil Cooler To Tube (1 required per assembly)
HOSE-MOLDED       O - Replaced by 32-848956  
32-12818This part has been superseded. HOSE-MOLDED O - Replaced by 32-848956
(more info)
    UnavailableUnavailable Parts
HOSE Molded 32-848956 32-848956
32-848956OEM Part 32-848956 - Hose (more info) About Mercury Marine $43.75 $43.75 Add to shopping cart
Available to order:
Usually ships
within 8 days
#17 22-13177 TUBE, Non Power Steering Models (1 required per assembly)
TUBE 22-13177  
22-13177OEM Part 22-13177 - Tube (more info) About Mercury Marine $15.34 $15.34 Add to shopping cart
Available to order:
Usually ships
within 8 days
#18 32-64346 HOSE, Molded, Oil Cooler To Thermostat Housing (1 required per assembly)
HOSE-MOLDED       O - Replaced by 32-896998 32-64346
32-64346This part has been superseded. HOSE-MOLDED O - Replaced by 32-896998
(more info)
    UnavailableUnavailable Parts
HOSE Molded 32-896998 32-896998
32-896998OEM Part 32-896998 - Molded Hose (more info) About Mercury Marine $36.58 $36.58 Add to shopping cart
Available to order:
Usually ships
within 8 days
#19 32-89718 1 HOSE, Thermostat Housing To Water Pump (1 required per assembly)
HOSE 32-89718  1 32-89718  1
32-89718 1OEM Part 32-89718 1 - Molded Hose (more info) About Mercury Marine $64.90 $55.57 Add to shopping cart
2 in stock. Explain stock levels
#20 54-18076 8 CLAMP, Worm Gear (2 required per assembly)
CLAMP Worm Gear 54-18076  8  
54-18076 8OEM Part 54-18076 8 - Clamp (more info) About Mercury Marine $11.10 $11.10 Add to shopping cart
Available to order:
Usually ships
within 8 days
#21 32-89749 1 HOSE, Thermostat Cover - Port (1 required per assembly)
HOSE 32-89749  1 32-89749  1
32-89749 1OEM Part 32-89749 1 - Molded Hose (more info) About Mercury Marine $57.40 $49.16 Add to shopping cart
Available to order:
Usually ships
within 8 days
#22 32-89730 1 HOSE, Thermostat Cover - Starboard (1 required per assembly)
HOSE 32-89730  1 32-89730  1
32-89730 1OEM Part 32-89730 1 - Molded Hose (more info) About Mercury Marine $61.30 $52.48 Add to shopping cart
Available to order:
Usually ships
within 8 days
#23 54-18076 4 CLAMP, Worm Gear (8 required per assembly)
CLAMP Worm Gear 54-18076  4  
54-18076 4OEM Part 54-18076 4 - Clamp (more info) About Mercury Marine $6.25 $6.25 Add to shopping cart
Available to order:
Usually ships
within 8 days
#24 32-33220 70 HOSE, (48.00 Inches Bulk), Cut As Required (2 required per assembly)
HOSE-48 INCH      O - Replaced by 32-8M0062614 32-33220 70
32-33220 70This part has been superseded. HOSE-48 INCH O - Replaced by 32-8M0062614
(more info)
    UnavailableUnavailable Parts
HOSE (48.00 Inche 32-8M0062614 32-8M0062614
32-8M0062614OEM Part 32-8M0062614 - Water Hose (more info) About Mercury Marine $59.30 $50.77 Add to shopping cart
Available to order:
Usually ships
within 8 days
#25 12552 LIFTING EYE (1 required per assembly)
LIFTING EYE 12552 12552
12552OEM Part 12552 - Lifting Eye (more info) About Mercury Marine $11.40 $11.40 Add to shopping cart
2 in stock. Explain stock levels
#- 27-13218A 1 GASKET SET (1 required per assembly) SN# 0A398941 THRU 0D725499
GASKET SET        O NLA  
27-13218A 1 GASKET SET O NLA
(more info)
    UnavailableUnavailable Parts
#- 27-808730A92 GASKET SET (1 required per assembly) SN# 0D725500 THRU 0D937011
GASKET SET        O - Replaced by 27-808730A98  
27-808730A92This part has been superseded. GASKET SET O - Replaced by 27-808730A98
(more info)
    UnavailableUnavailable Parts
GASKET SET        O NLA 27-808730A98
27-808730A98 GASKET SET O NLA
(more info)
    UnavailableUnavailable Parts