1982 evinrude 70hp

[evinrude70hp]

hi all i have a 1982 evinrude 70hp and i was running it on the muffs (revving it) to clean it out and i was told i will destroy my engine due to lack of back pressure. can someone explain this???

 

[tashasdaddy]

Re: 1982 evinrude 70hp

never run you motor over 1500 rpms, on muffs, read all of this, including the other links in it. http://forums.iboats.com/showthread.php?t=195016&highlight=classic+runaway