
Posts: 8
Registered: ‎03-10-2016
Accepted Solution

2008 etec 115 Compression

I recently took my boat into get a new injector replaced. (2nd one in 1.5 years)  I run ethanol free gas along with fuel addative but unfortunatly I'm still replacing injectors.  (hopefully just fixing previous owners mess ups).  Motor has roughly 350 hours on it and is a 2008 115 etec jet prop.  While in at the mechanics getting the latest injector installed they mentioned they did a compression test while they had the computer hooked up.  He stated that 2 cylinders had 120 compression and the other 2 had 135 compression.  Are these compression statistics above the Evinrude recommendations?  I am aware of the 15 percent difference and my difference is only 8.5 percent so I believe I am good there but unfortunatly I cannot find normal compression ratings for the etecs anywhere.  Does anyone have any insight into this?  Thanks in advance.  

Posts: 8,175
Registered: ‎07-14-2011

Re: 2008 etec 115 Compression



There are no specific numbers for Evinrude outboard compression readings as there are too many variables that affect the test. The service manuals call for a 15% difference or a 15 psi difference between cylinders depending on the engine.


If you perform a decarbonization using Evinrude Engine Tuner you may find that the compression numbers may increase after freeing up any carbon stuck piston rings.







