https://youtu.be/TmRfkGS-9po
https://youtu.be/sORH2lWba9o
Tried to fire the boat up this morning and got this. Finally fired off and cranks fine now but don’t want to get out there and not get it started again.
40hp Yamaha 4 stroke
I don’t know if it came through in the video but there was a high pitched whine when it was trying to fire off.
Any thoughts?
Sounds like it’s not getting fuel
Weird thing is that once it gets past the slow start it fires up no problem.
Should have said earlier that when I first turned the key, the starter sounded really slow.
Still scratching my head…
“I’m not in this world to live up to your expectations,neither are you here to live up to mine” Peter Tosh - I Am That I Am
Battery is probably going bad or needs a good charging.
The battery is only a few weeks old. I checked connections and they all looked good. It was fully charged, but I will throw it on the charger just to be sure.
“I’m not in this world to live up to your expectations,neither are you here to live up to mine” Peter Tosh - I Am That I Am
Check voltage on battery before you put it on the charger and then again while the motor is running.Maybe the charging system on your motor is not working.
Charged battery and I think it is good. Motor was doing this this morning. It is almost like the starter is stuck and after it turns over a few times it finally fires off. Does that make sense? Do you think it is the starter going bad? It fires up fine now.
“I’m not in this world to live up to your expectations,neither are you here to live up to mine” Peter Tosh - I Am That I Am
Check voltage at the starter.
I have a Yamaha 40 4 stroke and had a ground work loose in the motor. Follow your battery cables where it goes into the motor and check to make sure they are tight. Hope that helps
Do you have a battery switch installed inline? These switches can actually go bad. While they will allow enough amperage to pass through for trimming the motor they will
Not allow enough for the motor to crank. If you have one and have checked all the other connections try bypassing the switch and see what happens.
sounds like a weak battery (even though its new) or weak starter. when you check all the connections, also check your cables where the ends are crimped on and the insulation starts. look for corrosion there and look for any corrosion inside the insulation. wires can look good from the outside, but be corroded on the inside, especially if they’re the wrong kind of lug or crimp.
also, be careful holding a starter that long, especially with a weak connection. you will burn a starter up quick like that.
Proline 201WA
Aloha 24ft pontoon (LooneyToon)
Old Town stern with 7.5 johnson
Update:
Motor fired up fine after the initial slow start and ran fine yesterday, firing up multiple times. The intermittent nature of the issue is what is confusing me.
I am leaning towards a weak/dying starter, but am gonna check all my connections/wiring before I head down that road.
“I’m not in this world to live up to your expectations,neither are you here to live up to mine” Peter Tosh - I Am That I Am
use a set of jumper cables and connect the battery to the motor.
Leave everything in place on the motor.
If the slow start goes away, your fault is in the wiring.
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Finally got my hands on a multi-meter and the ISO diagrams so I can get to the starter (connections are kind of buried on the motor). Going to try Chris V’s suggestion and go from there.
Chris, should I jump directly to the starter, or the solenoid?
“I’m not in this world to live up to your expectations,neither are you here to live up to mine” Peter Tosh - I Am That I Am
quote:
Originally posted by LowcountryboyUpdate:
Motor fired up fine after the initial slow start and ran fine yesterday, firing up multiple times. The intermittent nature of the issue is what is confusing me.
I am leaning towards a weak/dying starter, but am gonna check all my connections/wiring before I head down that road.
“I’m not in this world to live up to your expectations,neither are you here to live up to mine” Peter Tosh - I Am That I Am
Betting on bad connections in the main/heavy battery cables or bad cables, themselves. Or, the link between the solenoid and the starter.
Been a long time ago, but, had a boat that had these same issues. Would spin very slowly, then suddenly heal itself, spin up and start. Then, sometimes wouldn’t spin fast enough and we’d end up killing the battery trying to get it started. A few times we got it running with the pull cord. But, pull starting a 1970 vintage OMC 135 was no easy trick. You really gotta want to get some skiing in if your willing to go there.
It turned out to be the negative battery connection. When we’d turn the key to start the motor, it asked the battery for a hundred amps or so. The bad connection would prevent good power getting through and get hot and cook itself. I guess the heat cycling would ‘clean’ the connection a little and the motor would suddenly spin up and start. Eventually, it finally refused to start and melted the post on the top of the battery. Lucky we didn’t have a fire.
I would pull ALL battery cable connections and clean to bright metal and reinstall.
And, load test your battery. Testing voltage is nearly useless in this scenario. Your starter needs lots of AMPS to turn. A bad battery can show 12+v and still have very little available amperage. $30 at Northern Tool.
quote:
Originally posted by LowcountryboyFinally got my hands on a multi-meter and the ISO diagrams so I can get to the starter (connections are kind of buried on the motor). Going to try Chris V’s suggestion and go from there.
Chris, should I jump directly to the starter, or the solenoid?
“I’m not in this world to live up to your expectations,neither are you here to live up to mine” Peter Tosh - I Am That I Am
If I’m understanding correctly, he’s suggesting you use the jumper cables to bypass the motor wiring. So wherever the positive hooks to the motor, hook the positive cable there and same for the ground.
Basically supply the motor with power through some known good wiring to eliminate your wiring.
Wadmalaw native
16’ Bentz-Craft Flats Boat
You are correct. Once I got into the motor it is pretty obvious where to land the jumpers. Only problem is now it will not do the slow start at all. It keeps firing up like normal.
“I’m not in this world to live up to your expectations,neither are you here to live up to mine” Peter Tosh - I Am That I Am
are you saying it wont do the slow start with the jumper cables installed? or it wont do the slow start at all any more? if it’s not doing the slow start with the jumper cables on, then you have your answer
Proline 201WA
Aloha 24ft pontoon (LooneyToon)
Old Town stern with 7.5 johnson
quote:
Originally posted by TheMechanicare you saying it wont do the slow start with the jumper cables installed? or it wont do the slow start at all any more? if it’s not doing the slow start with the jumper cables on, then you have your answer
Proline 201WA
Aloha 24ft pontoon (LooneyToon)
Old Town stern with 7.5 johnson
Will not do the slow start at all…
“I’m not in this world to live up to your expectations,neither are you here to live up to mine” Peter Tosh - I Am That I Am
quote:
Originally posted by Lowcountryboyquote:
Originally posted by TheMechanicare you saying it wont do the slow start with the jumper cables installed? or it wont do the slow start at all any more? if it’s not doing the slow start with the jumper cables on, then you have your answer
Proline 201WA
Aloha 24ft pontoon (LooneyToon)
Old Town stern with 7.5 johnson
Will not do the slow start at all…
“I’m not in this world to live up to your expectations,neither are you here to live up to mine” Peter Tosh - I Am That I Am
Is it possible you just “reconnected” a bad connection when you put the cables on?
I’d go through and check all of the connections at the motor and at the starter. Couldn’t hurt for sure!
Wadmalaw native
16’ Bentz-Craft Flats Boat