yanmar ym 1500 battery?

[billymc]

ok guys i think the battery is on the way out it just seems to go back to around 75 percent charge and in the cooler weather its not enough to start it? so what do you guys fit ie like cold crank ? thanks

 

[clemsonfor]

I forget the series but put the largest one your tractor will hold in there. mine is at the farm so I don't know.

 

[rjsharp]

I have a YM 2000, I bought my battery @ walmart, I think it is around 650 cold cranking amps. Hope this of some help. Take care.

 

[billymc]

ok guys it says only 300 crank on the battery that is on it so will have a meassure up see what will fit will update when i see what there is. thanks

 

[California]

Just measure and get the largest (capacity) battery that will fit.

I don't know if the same definitions are used in the UK compared to here, but I bought a 'Group 24' that fits in my slightly larger YM240 (YM2000).

Before that - when I bought the tractor I moved over the used battery from my wife's Subaru. It was smaller than a '24' but that worked fine to get the second four years of life out of that battery. I think the one from the Subaru is near universal across Honda, Toyota, etc.

Just don't make the mistake I made with my first replacement - the salesman told me a 'dual purpose' marine battery, intended for both starting and for running an electric trolling motor etc, was a good choice because they have less self discharge if not used for months. I discovered after a year or so that this type isn't built tough enough for the shock and vibration on a tractor, and had to replace it with an ordinary automotive battery.

 

[billymc]

o thanks for that im looking at heavy duty deisel at the moment will meassure and let you all know . thanks

 

[kenmac]

Just replaced my batt. I think it's 650 cca. It cost me $105.00 which I thought was a little steep

 

[billymc]

yes im looking for a big cca on a battery not sure if thats expensive as we use pounds here not dollars.dose it fire it up quite fast?

 

[kenmac]

It spins over at a good rate.I did replace my old cables with new ones (from starter to batt & the ground)

 

[billymc]

ok thanks

 

[clemsonfor]

for those in the US there is codes that you can use to get $30 off a battery from Advanceaoutoparts.com This will make their batteries the cheapest around.

 

[billymc]

o dont get many bargins like that here

 

[clemsonfor]

The last 3-4 batteries i have bought from them i have used this online then picked them up in the store. That $100 battery is now $70!

 

[Katahdin]

FYI, my 2012 model Yanmar came equipped with a 540cca battery to turn over a 4cyl 4tnv88 engine.

Part/Model# 526RMF
Group Size 26R

 

[winston1]

Does your 2012 model have compression release?

 

[kenmac]

Does your 2012 model have compression release?

I wonder if it has the same (or less) compression as our old iron

 

[Katahdin]

No compression release that I can find. Just warm the glow plugs and turn it over. I did some research and conclude it must come with a gear-reduction starter, that I know will use less amps then a conventional starter. Maybe you can refit the older engines with a gear-reduction starter, I've done it before with an old surplus military truck.

The compression ratio I found on the 4tnv88 spec sheet is 19.1

 

[winston1]

My curiosity has been touched. I have several manuals and one for a ym276 engine which has a compresson ratio of 20:1. Suppose to have 497-569 compression psi @ 300rpm.

Read a couple of internet conversions on compression ratio to compression psi to use 14.7 as multiplier. Evidently that doesn't work with these Yanmars. 20 X 14.7 = 294. Can you gurus tell us how to convert ratio to psi?

I'd bet a dollar to a donut that 4tnv88 has a pretty high compression psi also.

 

[Katahdin]

Hey Winston, I'm actually flying down your way tomorrow, I'm spending Christmas at my brother's in Killeen, TX.

I'm not a diesel expert but I'll ponder your question on the flight down. The only compression figure I can find for the 4tnv88 is 93.8 PSI for "BMEP, Net Power." I'm using martindiesel.com for the spec sheet. http://www.martindiesel.com/products/Engines/4TNV88 SPECIFICATION SHEET.pdf

Also, I'm wondering if there have been some compression design changes over the years due to EPA requirements so these diesels burn a little cleaner. I know that's what killed the Army's LD-465 multifuel engine which has a 22:1 compression ratio.

 

[California]

... Maybe you can refit the older engines with a gear-reduction starter ...

I put a gear reduction starter spec'd for a later and larger Deere/Yanmar on my YM240 (YM2000). I recommend this. It now cranks frantically fast and fires instantly regardless of starting technique. The more powerful starter was a perfect clone replacement. I only had to add a few inches to the wire that comes down from the key switch.
Cost me $100 (new, no exchange) via ebay.

Here's a post I made back in January with a photo of both starters. I described the high-output starter earlier in that thread, post #26.

As I noted there - this could also be a suitable remedy if compression seems too low for reliable starting. I wouldn't be surprised if this high-output starter, designed for a four cylinder engine, spins this little twin 50% faster than its native starter did when new. As I said, highly recommended.