Evinrude E-NATION, for those dedicated to water, power, fishing and fun
Posts: 1
Registered: ‎03-09-2017

Prop blowout

I'm currently running a 97 225 Vindicator with a 94 lower unit for now. Problem is I've tried a Raker and Raker 2 and they both blow out. The Raker 2 is a 26p and it blows out bad, cannot get over 3000 before it blows. The Raker is a 24p and it tries to blow out but eventually catches. Will the Raker 2 prop work at all and why is the Raker blowing out? I just had it worked. Also when I ran the Raker on the original 97 lower unit it worked great.

Posts: 9,068
Registered: ‎07-14-2011

Re: Prop blowout

[ Edited ]



Can you elaborate more on your description of "blow out" ?



Every rig is slightly different, even among the same hulls. The Raker II has a slightly different blade profile than the original Raker  and often performs better when run lower in the water.


The vent holes in the Raker may be prone to excessive ventilation on acceleration under certain conditions or hull designs.  The Raker vents are 1/2 dia, The Raker II vents are 5/8 dia. 
The Raker II, 26 pitch has a special blade profile along with the larger vents.



If you  had the prop recently "worked" it is possible something is amiss or has been radically changed.




"There is never just one thing wrong with a boat";
                    -- Travis McGee, main character in a book series by John D. McDonald 



The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.

The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.