current regulaor on YM1300

California · Apr 3, 2016

Carey the one you suggest is 40 amps. I don't know if there is space on the little YM1300 to mount it.

I think he has this tiny 'pancake' alternator:
New 12V 2 Amp Permanent Magnet Alternator John Deere with Yanmar Engine | eBay

careyo63 · Apr 4, 2016

I know who this is. There's a 68.00$ Alt for a JD. If you open the link there's a Ad for DB Electrical and that's who you need to talk to. Tell them what your looking to do.
Here's the link if it's not there. Yamaha, Starters Tractor items in DB Electrical-Starters-Alternators store on eBay!
There just next to me in Tenn. and a good friend who has owned a Auto repair shop for yrs. has used them. He also works on all types of Equipment.

California · Apr 4, 2016

Carey, DB are good folks. That's where I bought my starter. However - DB wants $45 to mail the regulator to UK. Bigmog is looking for a less expensive alternative.

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Ok I kept pursuing this because I may need this regulator someday.

I see Deere used a similar pancake alternator on their garden tractors. Deere # AM101406 is one of the regulators for those. It has terminal tabs instead of wires coming out. The two tabs labelled AC would go to the alternator, B+ to the battery, L I assume is lamp, and IGN probably turns the thing off when the key is off. I suspect it is similar to the original Yanmar regulator since the alternator is so simple. The alternator just has a permanent magnet spinning inside a circle of coils and puts out AC, to be used with an external rectifier/regulator.

Price for AM101406 on Ebay-UK is about $50 / 36 pounds, including shipping. (+VAT or customs fees?)
John Deere Tractor Regulator AM1

6 1

33 MOWER 332 MOWER 67 MOTOR GRADER | eBay

I found that Deere # looking on Amazon. They offer several clone versions of Deere # AM101406. Here is the only one with a lot of user comments (not all complimentary). Over-voltage is a frequent comment, one reply said resistance in old wiring is the cause and Deere recommends a relay to get full voltage signalled back to the regulator. I would just run a new wire. Or maybe add a diode (voltage drop) in the output wire.

I have found Amazon reviews to be a valuable source of user information that isn't available anywhere else.
Amazon.com: New Rectifier Regulator for John Deere Garden Tractor 33 322 332 Commercial Mower F915 Compact Tractor 67 77 87 97 1

: Automotive

Now- who's going to be brave and risk blowing up their alternator to try this out?

If that didn't work I would buy the Amazon regulator/alternator combo (under $100).

Neat 1500 · Apr 4, 2016

The reg California is talking about is used on many Yanmar tractors too including my YM14 which didn't have one when I bought it. I looked at buying one but needed something quick so made my own using a bridge rectifier and a capacitor for the interim, which has now been 7 or 8 years..... You could use any of the combination of regs they have as long as it has the 2 ac in terminals and a B+ out which really is all that is needed.

bigmog · Apr 4, 2016

had a look at uk suppliers this morning, all sourcing parts from the states, stupid prices and lead times, so it looks like its time to get the soldering iron out, one home made rectifier comming up

Barry 1 · Apr 4, 2016

Just buy a cheap($20) Kohler voltage regulator.Most of them are 15amp,and will work fine.Easy to wire up.

Neat 1500 · Apr 4, 2016

here's my shade tree mechanic reg, works beautifully :thumbsup:

bigmog · Apr 4, 2016

well, less than £5 worth of components and 1 diy regulator built, after getting a price of £149-00 from one supplier for the same regulator sold in the states for $35-00, and telling them where to go, decision was made