Please help!! my Evinrude has a problem.

davtay1

Recruit
Joined
Apr 1, 2017
Messages
1
I have a 1976 Evinrude 70hp model 70673d. I took it out and it ran fine we beached the boat and when we tried to start up to leave it was hydro locked. I pulled the center plug and the motor started right up but was blowing water out of the cylinder. I was able to limp it to the docks but need to fix this issue. In my research it seems it is one of 3 possibilities, bad reed valve, head gasket or the head it self.... any suggestions? Thank you in advance.
 

GA_Boater

Honorary Moderator Emeritus
Joined
May 24, 2011
Messages
49,038
Doubt it's a reed valve.

Start with a compression test.
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,226
My vote is also exhaust cover gasket. Slight possibility head gasket, but probably not. Definitely not a reed valve

If that is salt water, it is an emergency situation. That is, if it isn't already too late.
 
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