Owner`s manual

BEFORE EACH USE
BEFORE EACH USE
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. If checking during an outing,
allow the engine to cool. Be very careful to avoid burns from contact with hot engine parts.
• EnsuretheengineisOFFandtheenginesafetystartingswitchisdiscon-
nected. Leave the throttle/shift control lever in neutral. Open the engine
compartment and locate the raw water impeller housing. (This is also
sometimes referred to as a sea pump.)
• Disconnecttheintakeandoutflowhosesontherawwaterimpellerhous-
ing. Remove any debris found inside the hoses and then reconnect.
• Removethescrewsontheimpellercoverandverycarefullybreakthegasket
seal. Because a good seal is very important to avoid potentially serious leaks
while the engine is in operation, it is advisable to have some new gaskets in
the boat’s glovebox for such occasions. If even a slight gap exists, you may
experience problems in the future. Therefore, replacing the gasket is a better
idea than taking any chances with an older one. Also, leaving any portion of
the older gasket on the house or cover can impede good contact.
Ignoring elevated temperatures on a temperature gauge or any other evidence of the en-
gine operating at temperatures above recommended levels can result in serious damage
to the engine. Any resulting damage will not be covered by the warranty.
• Inspecttheinsideoftheimpellerhousing.Ifanyrubberextrusionsonthe
endofthearmappearfrayedorworn,itshouldbereplaced.Debrisenter-
ing the impeller inevitably will damage it. However, the impeller serves its
purpose in deflecting debris and keeping it out of much more expensive
internal engine parts.
•Anyuncertaintyabouttheconditionoftheimpellermeansthatitshould
be removed and inspected. The impeller fits very snugly and will require
some care in removing and re-installing or installing a new one. This en-
sures proper operation. The use of soap or water-based petroleum jelly will
help with installation. Note that proper placement on the gear results in a
squeeze on the arms. This is the correct installation.
• Placeagasketbetweenthehousingandthecoverafterensuringthatthe
surfaces are smooth and clean. Re-install the screws loosened when the face
platewasremovedearlier.Donotover-tightenthebrassscrewsasitwill
cause them to break.
Check the Raw Water
Impeller/Sea Pump
ILMOR MV8 Owner’s Manual • Page 14