MERCRUISER 5.7 250 HP Alpha One Serial L 020434 STINGRAY 240 CS Year 1998

Usage: 212 hours Made 200 hours Service on July 1, 2011
Saturday 10 September entered water to the compartment engine, giving origin to an electrical problem, preventing the engine to start. This gave origin to change several elements of the electrical system, such as the ICM module. Cap Distributor, Rotor, Coil, etc. They ordered and reviewed cables, plugs, etc., this part of the electrical system being revised.
By the side of the system of gasoline, a flushing of the pond was taking all the water which had accumulated, changed the water/fuel filter cleanse the carburetor changed the carburetor filter, in synthesis the entire fuel system was revised.
Result: The engine starts without a problem and works even in idle, including being arrested the boat can accelerate up to 3000 3500 RPM. Then being launched to idle speed, the engine still running smooth, but when accelerate up to 1500 / 2000 RPM the engine does not respond and working very uneven, as if you were running only on 6 / 7-cylinder, if you can pass over the 2000 RPM without that stops the engine, then it normalizes the functioning and you can upload to 3000 / 3500 RPM without problem. Even at the critical point of malfunction was tested to put gasoline directly into the carburetor, without any positive results, therefore this is ruled out that the problem is the fuel line, therefore the characteristics of the problem I think that it should the electrical system, there is possibly a cable changed position. ???

Re: MERCRUISER 5.7 250 HP Alpha One Serial L 020434 STINGRAY 240 CS Year 1998

Welcome aboard!

From the sound of your post, it seems to have been written in a language other than English, then translated with a translation program perhaps?

I say that because it doesn't make much sense to be honest. If English is not your first language, then perhaps you can find a friend to help you post - instead of using a translation program. If that's not the case, then I apologize in advance!

Re: MERCRUISER 5.7 250 HP Alpha One Serial L 020434 STINGRAY 240 CS Year 1998

Thank you for your Welcam
In fact my english is very poor and I have to use the translator, but I think any way the people can undestand, thank you again

Re: MERCRUISER 5.7 250 HP Alpha One Serial L 020434 STINGRAY 240 CS Year 1998

MARIO2130 said:

Thank you for your Welcam
In fact my english is very poor and I have to use the translator, but I think any way the people can undestand, thank you again

Click to expand...

Hello sir,

In reading your original post I worked out that it was direct, using a translation program, from Italian, yes? I have worked a lot with Italians and understand how they translate. Even with my knowledge, your post is extremely difficult to understand.

Summarising:
Water filled the engine compartment... How high did the water get? (Where did the water arrive?)
You have replaced much of the ignition system, plugs, leads, cap and rotor. Did you clean out the inside of the distributor? Exactly.
You cleaned the water from the carburettor and filters. Did you fully disassemble the carburettor? Did you completely remove all fuel (and water) from the fuel tank and fuel lines?
The problem you have is the engine will not run well in the mid-range (1500-2000rpm).

I would still be looking for water in the system. Maybe another clean out of the carburettor and all the filters and fuel lines....

I hope this helps you... Please do not use a translation programs for technical problems, they don't work....

Chris......