MOTC Manual - edited

11. No water coming out of cooling system weep hole
Debris in weep-hole waterline – Check waterline, remove debris
Intake clogged
Water-pump impeller damaged
Note: On some outboards, water does not come out of the weep hole until the
engine is warmed up.
12. Runaway or over-speed engine
Broken/damaged throttle cables
13. Carbureted inboard engine running-on (Dieseling) turning the key to
“off”
Turn starter key back to “on” while it’s still dieseling;; it should run normally
again. If it dies, water was likely pulled into cylinders while running-on
If can’t turn engine over after run-on, then remove spark plugs and run
starter
Replace plugs when water is discharged
Restart
Run engine until all water is out of oil
Always reduce RPM’s to idle before shutting off to reduce chance of run-on
DOI – Motorboat Operator Certification Course Chapter 2 – 18