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Author Topic:   Engine Flush
Toad2001 posted 05-14-2001 10:02 PM ET (US)   Profile for Toad2001   Send Email to Toad2001  
Is it ok to start my 40hp 2 stroke in the fully raised position to flush it with fresh water (earmuffs)? The boat is moored in
I figure it would be good for the old Mariner until I scrape together enough dough for a 50 hp 4 stroke.
lhg posted 05-14-2001 10:37 PM ET (US)     Profile for lhg    
Most engines have a tilt cut off switch to prevent running in the full tilt position.

Flush it in the down position. Get a good set of "earmuffs", the kind with the spring clip and wire that goes through the intakes. That will stay tightly in place and the fresh water only will flow into the engine. Mercury makes on of those unit for about $16. The "vee" style are not as good, especially for underwater work.

Toad2001 posted 05-14-2001 10:47 PM ET (US)     Profile for Toad2001  Send Email to Toad2001     
If it will start in the up position, will it harm the engine?
Whalerdan posted 05-15-2001 07:37 AM ET (US)     Profile for Whalerdan  Send Email to Whalerdan     
Good Question. Especially, if the boat is moored. Why couldn't you bypass the tilt cut off switch.
bmacauto posted 05-19-2001 09:52 PM ET (US)     Profile for bmacauto  Send Email to bmacauto     
I'd guess that if you had a carbonated motor, running in the tilted position might flood the carburetor, or it will only run for a short period as the carb wont pull in fuel from due to the shut off... if it's EFI, I donít know. Whenever I flushed mine out I just did it down. Hope this helps.

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