Parts for MerCruiser 496 Mag (H.O. Model) Cooling System, Fresh Water Components

Revise Search: All Models > 496 Mag (H.O. Model) > 1A611928 & Up > Cooling System, Fresh Water Components

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• View diagram and parts list below.
Each product listed is an OEM or aftermarket equivalent part. [ Example ]

Engine section

Reference numbers in this diagram can be found in a light blue row below — scroll down to order.
Each product listed is an OEM or aftermarket equivalent part. [ Example ]

#1	863771T	CROSSOVER, Coolant (1 required per assembly)
		863771T - Crossover-Coolant [ More info ] $321.75 Available to order: Usually ships within 8 days.
#2	27-881620001	GASKET, Cylinder Head to Crossover (2 required per assembly)
		27-881620001 - Gasket [ More info ] $22.08 Available to order: Usually ships within 8 days.
#3	10-881593	SCREW, (M10 x 30) (4 required per assembly)
		10-881593 - Bolt [ More info ] $7.30 Available to order: Usually ships within 8 days.
#4	26-861947	SEAL (1 required per assembly)
		26-861947 - Seal [ More info ] $35.30 $30.22 Available to order: Usually ships within 8 days.
#5	10-863609	SCREW, (M6 x 14) (2 required per assembly)
		10-863609 - Screw [ More info ] $1.50 Available to order: Usually ships within 8 days.
#6	22-12524	PLUG, (.375-18 x .475) Brass (2 required per assembly)
		22-12524 - Plug [ More info ] $3.70 Available to order: Usually ships within 8 days.
#7	805218T	SENSOR, Coolant (1 required per assembly)
		805218T - Temperature Sensor [ More info ] $49.91 In stock
		18-7600 - Sensor 805218T [ More info ] $29.99 $24.52 4 in stock.
#8	806490T	SENDER, Temperature (1 required per assembly)
		806490T - Water Temperature Sender [ More info ] $28.75 1 in stock.
		18-5897 - Sender, 97257A1 [ More info ] $26.99 $20.86 Available to order: Usually ships within 8 days.
#9	863358T	THERMOSTAT, 71Â°C (160Â°F) (1 required per assembly)
		863358T - 8M0076464 [ More info ] $16.00 1 in stock.
		8M0076464 - Thermostat -160 Degree [ More info ] $22.08 Available to order: Usually ships within 8 days.
		18-43017 - Thermostat S985009, 863358, 863358T [ More info ] $20.99 $17.58 2 in stock.
#10	25-865078	SEAL, Thermostat (1 required per assembly)
		25-865078 - Thermostat Seal [ More info ] $10.00 Available to order: Usually ships within 8 days.
#11	861949T	RETAINER, Thermostat (1 required per assembly)
		861949T - Retainer -t Stat [ More info ] $32.91 Available to order: Usually ships within 8 days.
#12	12-12038	WASHER (2 required per assembly)
		12-12038 - Washer [ More info ] $1.60 5 in stock.
#13	10-40003 54	SCREW, (M8 x 30) (2 required per assembly)
		10-40003 54 - Screw - Priced Individually [ More info ] $3.40 10+ in stock.
#14	26-865066	SEAL, Heat Exchanger to Crossover (2 required per assembly)
		26-865066 - Heat Exchanger Seal [ More info ] $12.40 Available to order: Usually ships within 8 days.
#15	863903A01	HEAT EXCHANGER (1 required per assembly)
		863903A01 - Heat Exchanger [ More info ] $1,297.14 In stock
#NS	37-863355	DECAL, Caution, Heat Exchanger (1 required per assembly)
		37-863355 - Decal Caution [ More info ] $1.80 Available to order: Usually ships within 8 days.
#16	863392	PAD, Heat Exchanger (2 required per assembly)
		863392 - Pad [ More info ] $5.70 1 in stock.
#17	22-62910 1	FITTING, Elbow - 90 Degree (.125-27) (1 required per assembly)
		22-62910 1 - Elbow [ More info ] $9.70 2 in stock.
#18	54-815504280	CLAMP, Worm Gear (2 required per assembly)
		54-815504280 - Clamp [ More info ] $6.00 1 in stock.
#19	32-863303	HOSE, Coolant Bleed (1 required per assembly)
		32-863303 - Molded Hose [ More info ] $48.90 $41.87 Available to order: Usually ships within 8 days.
#20	54-815504206	CLAMP, Worm Gear (2 required per assembly)
		54-815504206 - Clamp [ More info ] $4.90 Available to order: Usually ships within 8 days.
#21	861944A 1	RESERVOIR, Coolant (1 required per assembly)
		861944A 1 - Reservoir Assembly [ More info ] $169.33 Available to order: Usually ships within 8 days.
#22	862863	CAP, Coolant Reservoir (1 required per assembly)
		862863 - Reservoir Cap [ More info ] $17.60 $15.07 Available to order: Usually ships within 8 days.
#23	32-863304	HOSE, Reservoir to Crossover (1 required per assembly)
		32-863304 - Hose [ More info ] $11.00 Available to order: Usually ships within 8 days.
#24	54-815504212	CLAMP, Worm Gear, Hose (2 required per assembly)
		54-815504212 - Clamp [ More info ] $4.30 Available to order: Usually ships within 8 days.
#25	22-855214 1	FITTING, Straight Hose (1 required per assembly)
		22-855214 1 - Fitting [ More info ] $26.50 Available to order: Usually ships within 8 days.
#26	10-863388	SCREW, (M10 x 16) (3 required per assembly)
		10-863388 - Screw (M10X16) [ More info ] $3.40 Available to order: Usually ships within 8 days.
#27	862986	BRACKET, Coolant Reservoir (1 required per assembly)
		862986 - Bracket [ More info ] $39.25 Available to order: Usually ships within 8 days.
#28	10-818934 12	SCREW, (M8 x 12) (3 required per assembly)
		10-818934 12 - Screw [ More info ] $2.70 Available to order: Usually ships within 8 days.
#29	32-865221	HOSE, Crossover to Pump (1 required per assembly)
		32-865221 - Hose [ More info ] $31.91 Available to order: Usually ships within 8 days.
#30	54-8M2001490	CLAMP, Worm Gear (1 required per assembly)
		54-8M2001490 - 54-8M2001490 - CLAMP Worm Gear O [ More info ] Unavailable Replaced by 54-815504232
		54-815504232 - Clamp [ More info ] $6.40 $3.58 10+ in stock.
#31	54-865373	CLAMP, Hose (1 required per assembly)
		54-865373 - Hose Clamp [ More info ] $5.00 Available to order: Usually ships within 8 days.
#32	891717	COVER, Heat Exchanger End (2 required per assembly) Use With 3.75 Inch Diameter Heat Exchanger
		891717 - Cover -h/E [ More info ] $70.34 1 in stock.
#33	27-891716	GASKET, Heat Exchanger Cover (2 required per assembly) Use With 3.75 Inch Diameter Heat Exchanger
		27-891716 - Gasket - Priced Individually [ More info ] $13.00 1 in stock.
#34	25-8M0039163	O-RING, (3/8 x 1/8) (2 required per assembly)
		25-8M0039163 - O-Ring [ More info ] $6.10 Available to order: Usually ships within 8 days.
#35	10-98261	SCREW, (.375-16 x .750) (2 required per assembly)
		10-98261 - Screw [ More info ] $0.80 Available to order: Usually ships within 8 days.
#36	8M2000004	BRACKET, Flush Mount (1 required per assembly)
		8M2000004 - Bracket -Flush [ More info ] $22.17 Available to order: Usually ships within 8 days.
#N.S.	19-807992 3	COVER, Hose Clamp End (AR required per assembly)
		19-807992 3 - Cover-.375 - Priced Individually [ More info ] $0.53 10+ in stock.
		19-8M6500037 - 19-8M6500037 - COVER O [ More info ] Unavailable Replaced by 19-8M0074364
		198M0074364 - Cover-Clamp - Priced Individually [ More info ] $2.20 10+ in stock.