SERVICE MANUAL NUMBER 23
MAINTENANCE
8.
On Horizon Model: Remove drain plugs from fittings on each seawater pump hose.
75536
a
a - Drain Plugs - One Is Hidden From View
9.
Crank engine over slightly with starter motor to purge any water trapped in seawater
pickup pump. DO NOT ALLOW ENGINE TO START.
10.
After cooling system has been drained completely, coat threads of drain plugs with
Quicksilver Perfect Seal. Install all drain plugs and tighten securely. Reconnect all hoses
and tighten all hose clamps securely.
IMPORTANT: MerCruiser recommends that propylene glycol antifreeze (nontoxic
and biodegradable, which makes it friendly to lakes and rivers) be used in seawater
section of the cooling system for cold weather or extended storage. Make sure that
the propylene glycol antifreeze contains a rust inhibitor and is recommended for use
in marine engines. Be certain to follow the propylene glycol manufacturer’s recom-
mendations.
11.
For additional assurance against freezing and rust, remove the thermostat cover and
thermostat. Fill the engine seawater cooling system with a mixture of antifreeze and tap
water mixed to manufacturer’s recommendation to protect engine to the lowest temper-
ature to which it will be exposed during cold weather or extended storage. Using a new
gasket, reinstall thermostat and cover. Tighten cover bolts to 30 lb-ft (41 Nm).
NOTE: Hoses shown removed for visual clarity. Do not remove hoses.
a
b
c
d
e
a - Housing
b - Gasket
c - Thermostat
d - Spacer
e - Fill Here
Index
90-861326--1
MARCH 1999
Page 1B-53
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(1 votes, average: 5 out of 5)
Marine readers have rated Mercury MerCruiser GM V8 GM V8 454 CID 7.4L and 502 cid 8.2L Marine Engines Service Manual Number 23 5.0 out of 5.0 based on 1 product reviews. Just need the manual. Wrote review. Can't technically review what I haven't seen yet...