Late Model B7100 battery confusion

ken erickson

Active member

Equipment
B7100 hst, 2650 front mount snowblower, L2501 hst qa loader
Nov 21, 2010
166
52
28
Waupaca Wisconsin
Its time for me to replace a ten year old battery in my late model hst B7100.
After doing a search here in this forum I see that some folks say a 51R is a correct battery.
My owners manual says that the battery type is a 50B24L
I have a cheap group 22 lawn and garden battery in now that has 300 cca.

I am assuming that my owners manual is calling for a group 24 but I have been unable to to search and find a group 24l. It seems that some of the group 24 batteries I find have a length dimension that is too long.

Can someone shed some light as to why a group 51R is mentioned seemingly to contradict what my owners manual says and also why I do not seem to be able to find a group 24L?

I would like to purchase a battery that has more cold crank amps than what I currently have in place.
 

Captain13

Member

Equipment
M7040 4WD ROPS, ZD28
Feb 27, 2019
150
24
18
Kathleen, GA
i don’t think there is a 24L battery. All group 24 batteries should be the same dimensions. Messick’s carries the 50B24L battery if you want to check their site. Or you can go to Napa and they can come close to your size simply by doing a lookup on your tractor model.
 

85Hokie

Well-known member
Lifetime Member

Equipment
BX-25D w/ Filled Rears,2" Spacers,PTB. Under Armor, 90'-90'-92'-B7100HST's
Jul 13, 2013
7,866
316
83
Bedford - VA
Its time for me to replace a ten year old battery in my late model hst B7100.
After doing a search here in this forum I see that some folks say a 51R is a correct battery.
My owners manual says that the battery type is a 50B24L
I have a cheap group 22 lawn and garden battery in now that has 300 cca.

I am assuming that my owners manual is calling for a group 24 but I have been unable to to search and find a group 24l. It seems that some of the group 24 batteries I find have a length dimension that is too long.

Can someone shed some light as to why a group 51R is mentioned seemingly to contradict what my owners manual says and also why I do not seem to be able to find a group 24L?

I would like to purchase a battery that has more cold crank amps than what I currently have in place.
Ken

Measure the physical size of your battery and get one that is that size or a smidge smaller with the highest CCA you can afford. Go to wally world or NAPA or any place that sells batterys and pull out your tape measure and go from there!!!
 
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Dave_eng

Well-known member
Lifetime Member

Equipment
M7040, Nuffield 465
Oct 6, 2012
3,656
258
83
Williamstown Ontario Canada
In Canada we can buy 24L batteries.

You likely know this but the only significance of the L is to differentiate which side the + terminal is on.

Some manufacturers now put the terminals in the middle of the battery case and thus you can install the battery facing forward or backward to get the + terminal on the side you need it.
forum 24L battery 1.jpg


forum 24L battery 2.jpg


Dave
 

SDT

Well-known member

Equipment
multiple and various
Apr 15, 2018
1,669
123
63
SE, IN
Its time for me to replace a ten year old battery in my late model hst B7100.
After doing a search here in this forum I see that some folks say a 51R is a correct battery.
My owners manual says that the battery type is a 50B24L
I have a cheap group 22 lawn and garden battery in now that has 300 cca.

I am assuming that my owners manual is calling for a group 24 but I have been unable to to search and find a group 24l. It seems that some of the group 24 batteries I find have a length dimension that is too long.

Can someone shed some light as to why a group 51R is mentioned seemingly to contradict what my owners manual says and also why I do not seem to be able to find a group 24L?

I would like to purchase a battery that has more cold crank amps than what I currently have in place.
I replaced the battery in my B1750, which is similar to your B7100 (battery on left side between seat and fender), last year.

My B1750 also uses a 51R battery but I use a DEKA 651RMF in mine. The 651RMF is of the same physical dimensions as the 51R but has higher capacity and is only slightly more expensive.

Not a common battery so you will likely need to order one.

SDT
 

D2Cat

Well-known member
Lifetime Member

Equipment
L305DT, B7100HST, TG1860, TG1860D, L4240
Mar 27, 2014
9,452
590
113
40 miles south of Kansas City
When I needed a battery for the B7100 I went to the local farm store that sells InterState batteries. Had a 51R in stock, fit perfectly.

Be aware of a manual that is for a 35 year old machine. Specs change with improvements, especially oil, and batteries.
 

ken erickson

Active member

Equipment
B7100 hst, 2650 front mount snowblower, L2501 hst qa loader
Nov 21, 2010
166
52
28
Waupaca Wisconsin
Thanks all for responding!
Dave, I was not aware of what the L signified ! That is the sort of knowledge I was hoping to gain from this thread.

SDT,
"I replaced the battery in my B1750, which is similar to your B7100 (battery on left side between seat and fender), last year."

As a side note, my B7100 (B7100HST-D) has the battery located adjacent to the fuel tank on the right side under the hood.

My son works for a tire and auto center in town that handles Interstates. I have him checking on a price of a 51R for me today.

Thanks again !
 
Last edited:

Lil Foot

Well-known member
Lifetime Member

Equipment
1979 B7100DT Gear
May 19, 2011
5,228
282
83
Peoria, AZ
My B7100D gear (1979) has the battery located adjacent to the fuel tank on the right side under the hood,
and it has a 51R.