charging mystery

Muleman

Forum Newbie
Joined
Mar 17, 2016
Threads
1
Messages
3
This is our 1st post so be patient if we ask dumb questions.

We have a Briggs and Stratton 350445-1162-E1, code# 9907281, 19 hp V-twin we have retrofitted to drive a hydraulic pump on an all terrain scissors list. Originally, the engine did not have a AC/Alternator/Stator charging system. We ordered a half circle stator to go under the flywheel. This system does not show any increase in battery voltage when engine is at idle or high speed. However, if you disconnect from the battery circuit and measure direct from the alternator to ground DC voltage varies from 14 vdc at idle to 19 vdc at high idle. Reconnect to battery and its back to 12.3 to 12.8 vdc. We went today and bought a full circle alternator, installed it and we get the exact results?

Any ideas or direction?
 

bertsmobile1

Lawn Royalty
Joined
Nov 29, 2014
Threads
64
Messages
24,647
How and where are you taking the voltage readings.
What was the model number of the alternator, as you know there are a lot of different ones.
Is it regulated or unregulated ?

If it is regulated and the battery is fully charged it will not generate any power because there is no reason to do do so.
To test you need to put a load on the electrical system like a lamp.
An old headlamp works well.

How did you wire it into the machine ?
Photo please.
 

Muleman

Forum Newbie
Joined
Mar 17, 2016
Threads
1
Messages
3
How and where are you taking the voltage readings. Reading from battery post and from charging lead to neg battery post

What was the model number of the alternator, as you know there are a lot of different ones Could not find a model # on alternator and it is back together now

Is it regulated or unregulated both had the built in diode

If it is regulated and the battery is fully charged it will not generate any power because there is no reason to do do so.We have tried it with dead battery (jumped off) and fully charged battery, same results

To test you need to put a load on the electrical system like a lamp.

An old headlamp works well.

How did you wire it into the machine ? Charging lead is connected to positive battery lead

Photo please.
these are the two alt's we have tried with the same results
half ring alt.jpgful ring alt.jpg
 

ILENGINE

Lawn Pro
Joined
May 6, 2010
Threads
39
Messages
9,865
If this engine wasn't designed with charging system. Is there a chance that the flywheel doesn't contain the magnets on the inside to produce the magnetic field to generate power.
 

Mad Mackie

Lawn Addict
Joined
Jul 11, 2011
Threads
50
Messages
1,851
Does the underside of the flywheel have the magnets that are needed to make the stator have output?
 

Muleman

Forum Newbie
Joined
Mar 17, 2016
Threads
1
Messages
3
Does the underside of the flywheel have the magnets that are needed to make the stator have output?

Yes the magnets are there and appear new, If you disconnect from the battery circuit and measure direct from the alternator to ground DC voltage varies from 14 vdc at idle to 19 vdc at high idle. Reconnect to battery and its back to 12.3 to 12.8 vdc. We went today and bought a full circle alternator, installed it and we get the exact results?
 
Top