How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Jason Your Own Question
Jason
Jason, Marine Mechanic
Category: Boat
Satisfied Customers: 15894
Experience:  Degree in Marine Technology. Gas and diesel marine mechanic.
44667847
Type Your Boat Question Here...
Jason is online now
A new question is answered every 9 seconds

Q5i 2008 Tahoe, won't start. Battery fully charged, changed

Customer Question

Q5i 2008 Tahoe, won't start. Battery fully charged, changed the key starter, checked all the fuses, ran a jumper wire on starter all to no avail.
Submitted: 2 years ago.
Category: Boat
Expert:  Jason replied 2 years ago.
Hello my name is ***** ***** I will be helping you today. Is the engine cranking over but not starting, or is it not cranking over at all?
Which engine do you have in the boat, do you have the serial number on it handy?
Customer: replied 2 years ago.
Hi Jason, it is not cranking at all. We thought it might be the key starter because in the past we had to jiggle a wire on it to get it to start. First it usually beeps before starting. After replacing, still nothing.
Customer: replied 2 years ago.
Sorry, I have 190 hp mercury cruise, inboard/outboard
Customer: replied 2 years ago.
yes is get the serial #, give me a minute
Expert:  Jason replied 2 years ago.
When you turn the key to run, do the gauges come alive?
When did this problem start? Has anybody changed the battery, or charged it in place, or tried to jumpstart it?
Customer: replied 2 years ago.
It is the Alpha One 190 hp serial # ***** The problem started last year boating season. However, every time we played with the wire it would start. Yes battery fully charged. I had it checked at auto zone
Customer: replied 2 years ago.
Our next move is to try and jumpstart it. Can you tell me the proper procedure so we do not mess it up?
Customer: replied 2 years ago.
oh sorry, yes the horn, gauges, and trim all work
Customer: replied 2 years ago.
but you do not have to turn the key for that. Just flip power switch.
Expert:  Jason replied 2 years ago.
Hold the key to start with 1 hand, and with the other hand wiggle the shifter back and forth. Does it attempt to start?
Customer: replied 2 years ago.
We I think he did try that a couple of times. Nothing..
Expert:  Jason replied 2 years ago.
The flow of power runs from the battery, through the main fuse, through the circuit breaker, up the harness to the key switch, through the neutral switch in the shifter box. Down the harness to the slave solenoid on the engine, and then over to the starter solenoid. Since you have power to the key switch the problem lays between the switch and engine. The lower of power will have to be traced with a voltmeter. Do you have a meter and do you know how to take basic voltage measurements?
Customer: replied 2 years ago.
Yes we do, he is going to try that too, but not sure if he knows exactly what to look for. Yes we are both tower crane operators and know basic electric.
Expert:  Jason replied 2 years ago.
Start with this. Remove they key switch and turn the key to run, What do you show for voltage on the purple wire? Next, turn the key to start, what od you show for voltage out of the yellow/red wire?
Customer: replied 2 years ago.
Okay, we will. He is at work right now so will have to try either later on or tomorrow. What type of reading should we get?
Customer: replied 2 years ago.
I know exactly the wires you are talking about since we replace the key starter.
Expert:  Jason replied 2 years ago.
You should get a reading close to battery voltage. a standing battery is 12.5 volts. You should get at least 11V out of the keyswitch in those respective positions. Also check the red power wire that goes into the keyswitch to make sure it has a good connection. Does that make sense?
Customer: replied 2 years ago.
Yes very much so. Thank you for your input. I will let you know how it goes..
Expert:  Jason replied 2 years ago.
You got it and I was glad I could help. Let me know what you get for results. It might pop out at you as soon as you remove the key switch.
--Jason
Customer: replied 2 years ago.
Okay thanks, ***** ***** nice day.
Expert:  Jason replied 2 years ago.
You as well. Keep me posted.
--Jason

Related Boat Questions