Important: This is a critical function of routine maintenance. Even clean-appearing
waterways may have debris such as pine needles or moss that can enter the cooling
system and create a blockage. Failure to perform this function can result in serious
overheating of the engine. Damage to the engine and/or transmission caused by
overheating is not covered by warranty! Always pay attention to your temperature
gauge, even if you are carefully performing this check. Failure of the raw water im-
peller or blockage of the transmission cooler are frequent causes of over-heating.
Because this process should be completed while the engine is cool (in order to avoid burns), it is
recommended that this check be completed prior to starting the engine.
• EnsuretheengineisOFFandtheenginesafetystartingswitchisdisconnected.Leave
thethrottle/shiftcontrolleverinneutral.Opentheenginecompartment.Thetrans-
missioncoolerislocatedeithernearthetoporonthesideoftheengine.
• Loosentheclampsurroundingthewaterintakehoseatthebackofthetransmission
coolerandslideoffthehose.
• Checktheinsideforsignsofdebris.Evensmallamountsofdebrismustberemoved
topreventthematerialfromcloggingthecoolerandpreventingitfromfunctioning
properly.Theboatmustnotbeoperatedwithanyforeignmaterialsblockingtheflow
ofwaterthroughthecooler.
• Aftercleaning,re-attachthehoseandclamp.
Important: This is a critical function of routine maintenance. Even clean-appearing
waterways may have debris such as pine needles or moss that can enter the cooling
system and create a blockage against the screen. Failure to perform this function
can result in serious overheating of the transmission. Damage to the engine and/or
transmission caused by overheating is not covered by warranty! Always pay atten-
tion to your temperature gauge, even if you are carefully performing this check. Fail-
ures of the raw water impeller or blockage of the transmission cooler are frequent
causes of over-heating. Water in the transmission oil as a result of cooler failure may
also void the warranty!
This procedure applies on to boats equipped with full-closed cooling system. Because this process
should be completed while the engine is cool (in order to avoid burns), it is recommended that this
check be completed prior to starting the engine.
•EnsuretheengineisOFFandtheenginesafetystartingswitchisdisconnected.
Leavethethrottle/shiftcontrolleverinneutral.Opentheenginecompartment.
Locatetheclosedcoolingsystemtankadjacenttotheengine.
•Removethecapandcheckthelevel.VerifythatthefluidisattheFILLline.(Whenthe
engineheats,thewaterwillexpand;thatisthereasonthetankshouldnotbefullwhen
theengineiscold.)Ifthelevelisatorbelowthat,addILMORantifreeze.Usepremixed
50/50orusea50/50mixofILMORantifreezeanddistilledwater.Thecoolingsystem
willtakebetween5.8gallons(22L)and6.8gallons(26L)ofcoolantintotal.
Check the
Transmission Cooler
Check the
Coolant Level
2011 ILMOR MV8 Owner’s Manual • Page 15