70 hp rpm,

[Tonja]

Want to thank all that has helped me get my evinrude up and going. It runs great now. All I want to know is before I cleaned tha carbs I could not go under 4.7 mph without it dying, now I can go to 2.5 mph but it starts to run rough. Should I increase my idle? It Idles at 750 rpms warm and in gear. Also my manual says you can run this motor up to 5000-6000 rpms. 6000 rpms sound high to me. I have a 15 pitch prop and could easily reach 6000 but I keep it under 5600 at all times. Don't even need to trim it to get this. What pich prop do you think I could use?

 

[Hooty]

Re: 70 hp rpm,

750rpm idle in gear sounds right. You might be able to adjust your low speed jet to smooth the idle out but I wouldn't idle it any higher. To much wear and tear on the clutch dogs when you put it in gear if you do.<br />The engine can turn the 6k ok but if it goes over that, you probably should increase the prop pitch. As a rule of thumb, one inch of prop pitch changes engine speed 200rpm. If you go up one inch in pitch, the engine will drop off about 200rpm.<br /><br />c/6<br /><br />Hooty