2006 200 optimax no bottom end and losing rpm

[scottkelleytriton]

06 opti 200

losing 500 rpm
wont come out of hole..

just had new plugs, filters changed and coil packs are all good

25 trophy plus prop...new

just started doing this...motor does not miss, spit, or anything...just losing bottom end power...

 

[CharlieB]

Re: 2006 200 optimax no bottom end and losing rpm

First, do you have a FACTORY service manual?

If not, Try these links

http://forums.iboats.com/showthread.php?t=309079&p=2072211#post2072211

http://1manual.com/Mercury manuals/Service_Manual_Index.html

Troubleshoot any and all problems with basic checks to ensure you have a sound engine, check compression and test spark on each cyl using an adjustable gap spark tester set to 7/16 inch gap.

Once you verified the basics are fine then you can move to the fuel delivery.

The factory service manual will become your greatest ally, showing how how to test and where to test each system to narrow the problem down to the culprit component.

Start with fuel pressure and air pressure to the injectors with the motor at idle, then again as you attempt to accelerate. You want to see if either pressure changes and if they stay within the narrow range spelled out in the service manual.