'99 Merc 4st, power loss

[Wayne SW MO]

I have a '99 4 stroke (carburated) that ended up with clogged jets because of some neglect during a long move.<br />It now runs fine off the trailer, which is generaly 2-3 miles. After being off for a period of time and restarted it bogs down at about 4K RPM. After I run 3-4 miles, nursing it at just under the point at which it pulls down, It will slowly, very slowly raise the RPM limits until it will finally run normal again. <br />Any ideas?

 

[rabidfish]

Re: '99 Merc 4st, power loss

75hp or 90hp?

 

[Wayne SW MO]

Re: '99 Merc 4st, power loss

50hp. I also failed to note that this is after the carbs had kits installed. Could they have failed to hook something uo, or adjust the choke properly?

 

[DHPMARINE]

Re: '99 Merc 4st, power loss

Don't the carbs need a special measuring tool to adjust the carbs ?Mercury gauges to balance and sync ?<br /><br />DHP

 

[Wayne SW MO]

Re: '99 Merc 4st, power loss

I was told that they do and that it was done.

 

[rabidfish]

Re: '99 Merc 4st, power loss

They do, but that wouldn't cause a problem at higher speeds. I would get it back to the place that worked on it previously... Let tham have a chance to make it right. Might be something simple...<br /><br />Is it one of the engines that had the "rocker arm" recall?