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I have a Mercury 3.0 litre xri {1995} 225 horse. I have a hesitation going to full throttle from idle to 2000 rpm. The hesitation can last from 10 seconds to 10 minutes. Going to full throttle from 2500 to 3000 rpm it does not hesitate. I have cleaned the fuel system, new plugs, new throttle positioning sensor, and the fuel injection system has been checked by a mechanic with no problems.Compression in each cyclinder is 100 psi 94-100 octane fuel is used. It seems electrical when it kicks, in it kicks in hard. Running a

Submitted: 389 days and 18 hours ago.
Category: Boat
Value: $15
Status: AWAITING CUSTOMER ACTION
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Posted by Mechman45 389 days and 7 hours ago.

Answer

Hello,

Some of the Mercury engines have a low speed and high speed ignition circuits in the stator. If you can give me the serial #, I can verify and give testing instructions. Also you can try a timing light (connecting to each plug wire one at a time) with engine running. They should all be firing.



Edited by Mechman45 on 10/15/2008 at 5:10 AM

388 days and 19 hours ago.

Reply

The serial number is 06258397

Posted by Mechman45 388 days and 17 hours ago.

Info Request

Thank you

I will check tomorrow and get back to you.

385 days and 19 hours ago.

Reply

I emailed you two days ago and still have not got a response? Regarding my qustion. Please e-mail my back as soon as possiable,Thank You

Accepted Answer

Hello..That engine uses a bobbin style stator and cdm modules. The Problem you describe can be caused by 2 items. 1st is the TPS is not set correctly and the 2nd by a bad/misadjusted shift interrupt switch. A faulty TPS can cause this... best way to check it is to have a "sweep test" done on the TPS (this can also be done as a "graph display" when connected to the Computer Diagnostic System.

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Expert: Pappy's Sales and Service
Pos. Feedback: 100.0 %
Accepts: 852
Answered: 10/19/2008

Marine Mechanic

Certified Technician Mercruiser Mariner Mercury Johnson Evinrude & business owner

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