Re: 3 different forums and no solution for 9.9hp lack of power
I'm not sure what you mean by adjusting #25. I adjusted the low speed needle and the # 20. #23 just screws in if you are talking about the high speed jet.
The spark tester showed it was firing at just below full throttle.
One other problem is it won't start unless it gets a shot of pre-mix. After that it starts first pull. The choke is closed.
The thing is that we can't see or try things on your outboard. That means you're going to get a lot of ideas, some of which won't work to solve the problem.
Now, you're telling us some new information...the fact that it won't start cold without being primed, even with the choke fully on. That's a new symptom.
The problem began with the new top for the carburetor, right? That's what you said. You also said that you had to cut the little hose shorter to make it fit.
What I'm wondering right now is whether you have the right top for your carburetor. Small changes get made in those carbs every year. In addition, the carburetor on your engine may not be the original carburetor. That happens a lot.
Bottom line is that not enough fuel is going into the carb or getting through the carb to mix with the air. Float level is one possible issue. A clogged jet is another. A clogged passage somewhere in the carb is another.
We aren't going to suddenly be able to come up with some "Eureka" solution for your problem. We're not there, and we're not getting all the information we need.
On the forum here, there are some really good troubleshooters, but with difficult problems, it's all a matter of question and answer. The more information we have, the easier it gets.
So, let's look at all the information we have, along with all the questions people have asked in this thread. I don't think they've all been answered, and somewhere in there lies the solution.
So, lets start from the beginning: How long have you owned this outboard? Did this outboard run right at some point since you've owned it? What was the reason for buying the new cover for the carb? Was it a new one? How did you determine that was what you needed to get.
What was the problem with the outboard before you made this repair? What did you do to try to fix it before swapping out the top of the carb? Have you tested the fuel pump? Have you checked every fuel line connection, from the tank to the fuel inlet on the carb?
Did you thoroughly clean the carburetor before installing the new top? How did you set the float level. Did you change anything else in the carburetor? Have you tested the compression on this outboard? Has it ever overheated? Any other problems with it?
Answer all those questions and we'll be closer to a solution for your problem.
We'll stick with it and try to help, but you've got to chime in. That we've just found out that you needed a prime to start it cold is new info. We need all the info.
