RPM / power issues 115 HP Evinrude V4

[Rastafari]

I have a V4 Evinrude, 115 HP 2-stroke, 1983, just got it on the water. Sounds like it runs smoothly and continuously, but I'm topping out at 2100 RPM under load. When just on warm-up lever I'm getting higher than that. Before getting on the water I had replaced fuel pump and cleaned all carbs. I pulled the plugs after running, and both the starboard side plugs are oily / sticky. The portside plugs look great. I'm not sure how the carbs rout to the cylinders, if the top carb sends to the top two cylinders or if it's split port / starboard, so that could tell me if it's a carb issue or something else. I have not yet checked for good spark on the starboard side, but that's next. Any thoughts / insight would be appreciated!

 

[ScottinAZ]

Re: RPM / power issues 115 HP Evinrude V4

the carbs route to each cylinder individually, so to carb feeds the top cylinders, but one barrel to each side, same with the bottom. being as the two on the stbd side are different from the port side, I would check the ignition system, as that is common between the cylinders at least. could be a power pack on the way out.

 

[tashasdaddy]

Re: RPM / power issues 115 HP Evinrude V4

what is your compression, without atleast 100 psi on all cylinders, it is going to be a slug.

 

[Rastafari]

Re: RPM / power issues 115 HP Evinrude V4

Thanks, makes sense. I'll try to check out the spark this eve to see what I'm getting. If I had to replace a power pack around what do you think I'd be looking at costwise?

 

[Rastafari]

Re: RPM / power issues 115 HP Evinrude V4

Thanks, makes sense. I'll try to check out the spark this eve to see what I'm getting. If I had to replace a power pack around what do you think I'd be looking at costwise?