2005 yamaha 250 hpdi Stator or Rectifier

Mhales2226

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Jan 28, 2022
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Have a 05 250 HPDI. Starting battery runs 2 9 inch helix units and the motor. Fully charged battery is drained after about 6 hours of fishing. I get 12 volts at the battery with the motor idling. Not sure how to determine if its rectifier or stator???? Any help out there.
 

Faztbullet

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Mar 2, 2008
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Are they 9 or 9G2 units? Usually more than DF on when fishing such as aerator's,power poles, dash/instrument lights if wired to power switch.
 

99yam40

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Sep 7, 2008
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Most people run a start battery separately and a house battery for other things, so they do not drain the start battery down

even idling your motor should be putting out more than 12.0 volts at the battery.
service manual has testing procedures for testing out put of lighting coil and of the rectifier/ regulator
 

dingbat

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Nov 20, 2001
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16,671
With only 12 volts at idle you have a charging and or battery issue.

How old is the battery?

What is fully charged, rested voltage?

Having said that, don’t expect a starting battery to keep up with a full compliment of electronics.

I run a 1kW depth finder, chartplotter, radar, VHF and stereo. Had 1/2 load on start and half load on house battery. Could make it 6 hours on the troll before things started to go south.

I ended up swapping out the starting battery for a deep cycle to expand capacity and installed an ACR to charge the house battery. Problem solved
 

boscoe99

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Aug 22, 2013
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Most people run a start battery separately and a house battery for other things, so they do not drain the start battery down

even idling your motor should be putting out more than 12.0 volts at the battery.
service manual has testing procedures for testing out put of lighting coil and of the rectifier/ regulator
That is what I thought until I started reading the bass boat forums. Many, many, many use just one battery to start the motor and to run their electrics. With long use of those electrics and short use of the motor.

One reason they are in love with lithium batteries. It can do for them what a lead acid battery can't do.
 

boscoe99

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Have a 05 250 HPDI. Starting battery runs 2 9 inch helix units and the motor. Fully charged battery is drained after about 6 hours of fishing. I get 12 volts at the battery with the motor idling. Not sure how to determine if its rectifier or stator???? Any help out there.
At a fast idle the rectifier/regulator should be outputting ~ 14.5 volts. Presumption being a fully charged good condition battery.

How old is the battery? What size? Flooded lead acid type or AGM lead acid type?

First thing I would do is to inspect all of the connectors from the stator to the rectifier/regulator and on to the battery.

If the output voltage from the rectifier/regulator is below specifications, test the output from the stator. If below specifications, replace the stator. If the stator meets specifications then the rectifier/regulator is kaput.
 

boscoe99

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The more I think about it, if the stator is not outputting rated voltage then don't rush to replace the part. Don't throw parts at the problem. Trouble shoot. Maybe start unwinding the stator coils to find the discrepancy. Then just splice in a new section of wire.
 

99yam40

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The more I think about it, if the stator is not outputting rated voltage then don't rush to replace the part. Don't throw parts at the problem. Trouble shoot. Maybe start unwinding the stator coils to find the discrepancy. Then just splice in a new section of wire.
come on now don't get all wound up over someone elses thoughts on troubleshooting
 

boscoe99

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come on now don't get all wound up over someone elses thoughts on troubleshooting
Just trying to do better.

I am led to believe that not taking a component apart to find the core source of a problem is a failure to perform adequate trouble shooting.
Would be a waste to take a component that does not perform (say an ECU or a stator) and simply replace it rather than opening it up to find out which transistor or piece of wire has become defective.
 

boscoe99

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Aug 22, 2013
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Mr. Customer, I can spend a few hours taking your old pump motor apart to try and repair it, at a hundred bucks an hour, hoping that it is repairable and that such repair will last, parts being extra if needed, or I can spend half an hour and $140 installing a new part with a warranty.

What's your pleasure?
 
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flyingscott

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Apr 8, 2014
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The more I think about it, if the stator is not outputting rated voltage then don't rush to replace the part. Don't throw parts at the problem. Trouble shoot. Maybe start unwinding the stator coils to find the discrepancy. Then just splice in a new section of wire.
The more I think about it, if the stator is not outputting rated voltage then don't rush to replace the part. Don't throw parts at the problem. Trouble shoot. Maybe start unwinding the stator coils to find the discrepancy. Then just splice in a new section of wire.
Mr. Customer, I can spend a few hours taking your old pump motor apart to try and repair it, at a hundred bucks an hour, hoping that it is repairable and that such repair will last, parts being extra if needed, or I can spend half an hour and $140 installing a new part with a warranty.

What's your pleasure?
I a sorry where did the OP have a pump problem? I thought he had a charging problem? Why is there a pic of a cheap chinese pump motor on a post about a stator? Did I miss something in this post?
 

boscoe99

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Aug 22, 2013
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I a sorry where did the OP have a pump problem? I thought he had a charging problem? Why is there a pic of a cheap chinese pump motor on a post about a stator? Did I miss something in this post?
You did.

It was like the jitterbug. So simple it plumb evaded you.
 
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