5.0 gxi-j not starting

[Nico van Wyk]

Staying in Belize and there is no one that can help me to fix my boat engine.
Anyone with some feedback to why the engine cranks but will not start.I got the boat with the property and was standing for 5 years plus. Check the feul supply and that fine. Figure out that there is no spark at plugs.When I switch on the ignition I can hear the feul pump come on and switch of. Where do I begin to check for the problem.
Help will be appreciated
Nico

 

[alldodge]

Belize, oh man you got it ruff, even with a broke boat. lol

Look for the man over board (kill switch) and see if its been flipped

 

[Nico van Wyk]

Belize, oh man you got it ruff, even with a broke boat. lol

Look for the man over board (kill switch) and see if its been flipped

Thanks for the reply. Do u mean the one That u tie on your arm before u go?
That one I have tested and it works, clip is in and dashboard lights up when key is turned to on.

 

[alldodge]

Thanks for the reply. Do u mean the one That u tie on your arm before u go?
That one I have tested and it works, clip is in and dashboard lights up when key is turned to on.

Yes, that's the one, so its not the kill switch

Check for 12V at the coil with key ON and while cranking
If power is there where most likely need a scanner.

When cranking, does the tachometer show at least 300 RPM or more?

 

[Nico van Wyk]

Yes, that's the one, so its not the kill switch

Check for 12V at the coil with key ON and while cranking
If power is there where most likely need a scanner.

When cranking, does the tachometer show at least 300 RPM or more?

OK I will check for 12v and if RPM IS 300 or more when cranking. What happens if it's less then 300 sir?

 

[alldodge]

If less then 300, its not turning over fast enough to start

 

[Nico van Wyk]

Yes, that's the one, so its not the kill switch

Check for 12V at the coil with key ON and while cranking
If power is there where most likely need a scanner.

When cranking, does the tachometer show at least 300 RPM or more?

At the moment it cranks very slow. Could it be because it was standing this long. I did fit a new 80 anp battery

 

[alldodge]

Cranking slowly can mean a few things.
Weak or to small a battery, corroded battery cables, weak starter

80 anp battery

Assuming 80 amp is Ampere hour Ah
Not sure about VP, but Merc list minimum battery requirement for the 5.0 and 5.7 is 150Ah, or 550 ccc/825 mca

Are the battery cables clean and tight on both ends? This includes the ground to the motor

 

[Nico van Wyk]

Cranking slowly can mean a few things.
Weak or to small a battery, corroded battery cables, weak starter


Assuming 80 amp is Ampere hour Ah
Not sure about VP, but Merc list minimum battery requirement for the 5.0 and 5.7 is 150Ah, or 550 ccc/825 mca

Are the battery cables clean and tight on both ends? This includes the ground to the motor Did put new terminals on Battery end

 

[Nico van Wyk]

Did put new terminals on Battery side. Wil check the ground on engine side
Thx

 

[Nico van Wyk]

Did put new terminals on Battery side. Wil check the ground on engine side
Thx

What did u mean by scanner. What is the scanner?

 

[alldodge]

A scanner is used to see if the ECM (engine computer) has any fault codes. Rinda makes them, either digital like techmate pro, or diacom software

https://www.rinda.com/marine/marinemenu.htm

 

[Nico van Wyk]

A scanner is used to see if the ECM (engine computer) has any fault codes. Rinda makes them, either digital like techmate pro, or diacom software

https://www.rinda.com/marine/marinemenu.htm

How do u test the crank positioning sensor,if that is working or not. Do I just buy a new one.

 

[Nico van Wyk]

Battery is a 600 ccc, so that is fine. Started to take out the plugs to crank it without plugs. Discovered that that these plug were never changed at all. Two of them are so full of rust that one actually broke off and the other one I can not even get the plug spanner to fit over it. The other six I managed to get out. Will still try with a little gentle persuasion to get them out. Can not think that people manage to let it get to this point.

 

[alldodge]

Rust on spark plugs may also mean rust on cylinder walls. If rust on the walls, tat would cause slow cranking

Google CPS, there are vids

 

[QBhoy]

Sounds like the battery to me. Said it loads previously. Very often these will turn over healthy...but will take the power away from the system enough for the thing not to fire up.

 

[Nico van Wyk]

Sounds like the battery to me. Said it loads previously. Very often these will turn over healthy...but will take the power away from the system enough for the thing not to fire up.

Will a scanner pick up a faulty crank shaft positioning sensor?

 

[alldodge]

Will a scanner pick up a faulty crank shaft positioning sensor?

Yes, a bad one will throw a code