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 Tim K Your Own Question

Tim K
Tim K, Technician
Category: Small Engine
Satisfied Customers: 378
Experience:  Service Manager and technician for small engines and lawn equipment
57226730
Type Your Small Engine Question Here...
Tim K is online now
A new question is answered every 9 seconds

I have a riding mower Husqvarna YTH 2148 Its not charging it

Customer Question

I have a riding mower Husqvarna YTH 2148 Its not charging it shows a negative charge ( not going to the positive side ) This is what I have replaced so far all of bottom end blades belts, carb, plugs, ignition coils, battery fuel pump, and filter. Things I have tried already are the valves ( adjustments ) ( lack of power ), carb adjustments, cleaned the flywheel removed any rust. When using the PTO it just drains the battery even faster ( its electric ). Ive checked the 20 amp fuse its good. The only thing that bothers me about the replacement of the coils is I didn't put the ground wires back on I don't have any diodes. Thanks in advance
Submitted: 2 years ago.
Category: Small Engine
Expert:  Tim K replied 2 years ago.

Tim K :

Hello, welcome to Just Answers. My name is Tim, and I would like to help you with your question

Tim K :

What engine do you have in this machine?

Customer :

21 hp vanguard

Customer :

385777 0349-e1

Customer :

model and code

Tim K :

ok no problem.
a few other questions and then I should be able to help you diagnose your problem

Tim K :

do you have an electric meter or access to one, and know how to read one?

Customer :

yes and yes

Tim K :

ok great

Tim K :

now on the coils, did you replace the ignition coils chasing the charging problem?

Customer :

yes

Tim K :

alright. unfortunately on this engine the ignition coils do not have anything to do with the charging.

Tim K :

there should be a square box mounted on the side of the engine

Customer :

ok no problem this thing will all brand new when I get done

Customer :

yep there is

Customer :

3 wires red and 2 yellow

Tim K :

there is usually two yellow wires going to the box, and a connector there.

Customer :

rectifier/regulator 797375 part number

Customer :

ok

Tim K :

on the vanguard it is usually this part that goes bad on the charging.
you can do two checks to verify if it is this or the stator under the flywheel

Customer :

ok which one first

Tim K :

first disconnect the red wire, you want to check the side going to the machine for voltage with the key turned on. you should get battery voltage at this wire

Tim K :

this will make sure the charging circuit is intact

Customer :

it does

Tim K :

if that is ok, you next want to check the two

wires for the yellow connector. this one is sometimes tricky to get a good read on with the meter.

Tim K :

you want to check these two wires with a/c, not d/c, with the engine running

Tim K :

at full rpm you should see around 20 volts or more. more is ok, much less or zero is bad

Customer :

ok but why would it show a negative on the amp meter

Tim K :

the negative from the meter is because it takes voltage to run the fuel shut off solenoid, and also even more voltage with the pto engaged. if the engine is producing no voltage, the meter will see it as a negative draw on the system

Customer :

got it

Tim K :

if you have good voltage from the two yellow wires, (put one meter probe on one wire, and one on the other, not the engine ground), then your problem is the regulator

Tim K :

if you have low or no voltage from the two wires, then the stator is bad, and you could still have a bad regulator but not able to check it without a good source voltage from the stator.

Customer :

(if you have good voltage from the two yellow wires, (put one meter probe on one wire, and one on the other, not the engine ground), then your problem is the regulator) explain that one more time please

Customer :

touch both sides of the of the plug ?

Tim K :

on the check for a/c voltage from the two yellow wires, you are checking the ones coming from the engine, and the way to check them is with the meter on both wires. so the red on one of the yellow wires, and the black on the other yellow.

Customer :

got it

Tim K :

yes. you are checking for voltage using only those two wires and not the engine ground

just want to make sure i explain it correctly

Customer :

yes me too lol

Tim K :

It is almost always the regulator, but if you dont check you can wind up with a new regulator and still not have the problem fixed

Tim K :

on the coils again, you mentioned a concern about the diodes, are the still there just not plugged in?

Customer :

what about the alternator ?

Customer :

yep they are cut not attached

Tim K :

sorry, the stator i mentioned earlier is another term for the alternator. same thing

Customer :

so there is one then

Tim K :

yes. that is what the two yellow wires are from

Customer :

ok got it

Customer :

what about the 2 wires off the coils for the shut off

Tim K :

and the black wires from the ignition coils should be the kill wires. most models do have diodes in there, and if it is supposed to have diodes and they are not there, most of the time it will only run on one side.

Tim K :

with the wires hooked up direct i mean

Customer :

it wont even start with them hooked like that to the connector

Tim K :

ok, you can check with your meter and make sure those wires are not grounded with the key on. if that is the case, then a new wiring harness piece with diodes should take care of it.

Customer :

the new coils didnt have diodes installed on them so it goes from the coils to a little tab at the side of the engine and with them hooked up it wont start at all

Customer :

I tried that and it back fires at me

Tim K :

the diodes should be in the wiring

Customer :

not on mine

Customer :

not on the coils its just 2 straight pieces of wire

Tim K :

usually looks

something like this here..

Tim K :

link

Tim K :

keeps the coils from cross talking

Tim K :

if that looks like what you tried, then i would check the wires for ground when off of the coils, and the key turned on, and then off

Customer :

ok that came off the old ones but not on the new ones

Tim K :

most of the engines i see from briggs have something like that on them.

Customer :

yes there was one of those but am I suppose to use the old one ?

Customer :

I figured it was more like a fuse and needed to be replaced

Tim K :

ah, yes you re-use that. it is considered a part of the wiring harness.

Customer :

ok then

Tim K :

the coils try and ground each other out if the diodes are not in place. that explains the problem there.

Customer :

ok but not the charging part ?

Customer :

that doesnt have anything to do with that right ?

Tim K :

correct. the ignition coils and the charging are two seperate systems

Customer :

ok

Customer :

can you just come here and fix it

Customer :

ROTFL

Tim K :

lol..

Tim K :

if it ends up being the regulator as i suspect, then its a pretty easy fix :)

Customer :

I hope so Im tired of spending money on this thing

I guess I will have to figure this out tomorrow and let you know where

Customer :

I end up

Tim K :

ok sounds fine. I will check back in tomorrow afternoon.

Customer :

ok cool thanks for your help with this

Tim K :

you are welcome. let me know what you find, and I will help you as best I can

Customer :

ok

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
< Last | Next >
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Curtis B.

    Technician

    Satisfied Customers:

    6989
    have worked on and around most engine models for 35 yrs./Polaris ATV expert
< Last | Next >
  • http://ww2.justanswer.com/uploads/KO/koboma/2012-6-6_20917_DSCF1022.64x64.JPG Curtis B.'s Avatar

    Curtis B.

    Technician

    Satisfied Customers:

    6989
    have worked on and around most engine models for 35 yrs./Polaris ATV expert
  • http://ww2.justanswer.com/uploads/SM/SmEngPro/2012-8-5_3564_Rick1206290005Edit.fullres.logo.scrn.64x64.jpg Rick's Avatar

    Rick

    Factory Authorized Trainer

    Satisfied Customers:

    4126
    Outdoor Power Equipment technical trainer since 1990, covering eight states.
  • http://ww2.justanswer.com/uploads/GI/giftindex/2011-11-19_2715_JamesLWells500.64x64.jpg James W's Avatar

    James W

    Small Engine Troubleshooting Expert

    Satisfied Customers:

    2978
    7 years as Mechanic & Parts Manager for Brother who has Owned Lawn & Garden Repair shop for 35 years
  • http://ww2.justanswer.com/uploads/jonrk/2010-1-5_22551_jon.jpg Jon K.'s Avatar

    Jon K.

    Small Engine Diagnostic Expert

    Satisfied Customers:

    2950
    Gold certified Stihl tech, Service Manager for a rental/repair shop.Certified in most small engines
  • http://ww2.justanswer.com/uploads/MR/mr2cycle/2011-3-12_03458_sears.64x64.jpg Vince O.'s Avatar

    Vince O.

    Small Engine Technician

    Satisfied Customers:

    2374
    Over 30 years experience repairing lawn and garden equipment. Chainsaws, mowers,blowers and trimmers
  • http://ww2.justanswer.com/uploads/rheisnger/2010-12-31_010856_41385_100001225699183_7012_q.jpg RUSS's Avatar

    RUSS

    SERVICE TECHNICIAN

    Satisfied Customers:

    1723
    28 YEAR SERVICE TECHNICIAN
  • http://ww2.justanswer.com/uploads/BriggsEngines/2010-02-26_230200_n1834842973_4823.jpg CJBennett's Avatar

    CJBennett

    Small Engine Technician

    Satisfied Customers:

    623
    Briggs and Stratton Master Service Tech, Kohler, Tecumseh, Kawasaki certified. 18 years exp.
 
 
 
Chat Now With A Technician
Tim K
Tim K
Service Manager
378 Satisfied Customers
Service Manager and technician for small engines and lawn equipment