Have Boat Questions? Ask a Boat Repair Expert.
Hello. My name is Tan.
Is the engine acting up now? If the impeller was fine why did they replace it again and now it doesn't over heat.
Then they must of done something they didn't realize they did. I have seen this happen before and it turns out they had a loose hose connection where the engine was sucking air in around the hose causing intermittent heat issues. When they inspected the pump and reassembled they fixed the problem just by reassembling and getting everything tight. This is the only thing that can cause an issue like this when all parts are new.
Does this make sense?
Running in the shop isn't the same. The engine must be under normal operating condition in the water under a load.
A sensor is possible but it isn't acting up now correct?
The only way to find something like this is toi run the engine under normal conditions. It has to be acting up to find. I can guess but that doesn't tell you anything and in the end it has to be acting up.
Could be bad sensor, clog, blocked manifolds or risers. Clogged intake.
Starting off with no problems and getting progressively worse points to a water pump issue. Are all fluid levels up?
That would only affect the alarm if it has no voltage to the alarm. When you turn key on does alarm sound momentarily?
The alarm is signaled by a ground from a sensor on the engine.
No alarm for low fuel.
This engine should run around 170+/-5*F at all rpms.
The alarm should come on momentarily when key is first turned on. This is the self test to let you know the alarm is working.
Then we need to verify the alarm is getting voltage. If no voltage at alarm key on this would explain why they are not getting an alarm now.
You just got through saying they went through the dash to get engine started. They water tested the boat and got no alarm. Did they disconnect something?
The alarm should always come on momentarily for self test. Does alarm sound when you first turn key on?
Has the alarm ever sounded when you first turned the key on? It is supposed to as this is the self test for the alarm.
We could have an issue with the alarm as being the whole problem.
Is the engine over heating now?
Maybe I don't understand what your looking for here? Is there an issue with the motor now? Does the alarm sound when key is turned on? If no the alarm has a problem. As for the rest of the question what are you looking for?
I can't fix something that isn't broken. I explained why they may have not fixed the issue the first time.
This statement here tells me they fixed the engine."No the engine did not overheat this morning when the mechanic lake tested the boat." Have you water tested the boat since they fixed it? If yes then you would have to ask them what they found.
I have no idea what they found.
Anything is possible but if it is fixed now what is the concern. If you want to know what cause the issue ask them they worked on it. All I can do is give possible causes. I have given those.