Coolant

[Joeandmack]

What brands do people suggest for coolant? Any to avoid? I have some for my Subaru “in stock” thoughts on using that? Appreciate the help

[ScottyD'sdad]

I use whatever is on sale.

Ed

[indy61]

The old green type not the yellow.

[radioguy41]

Do not use Dexcool. Personally I stay away from all red AF. Vehicle specific AF, such as Subaru blue or GM Dexcool should not be used in vehicles not spec'd for them. As stated above, stay with green.

[ricky racer]

I use whatever is on sale.

Ed

The old green type not the yellow.

[Joeandmack]

Appreciate the advice, particularly Radioguy41. Looked up the side affects of dexcool and saw“eats away at head gaskets and intake gaskets” … I think I’ll pass on using whatever is lying about.

[NJ Farmer]

Prestone (green) anti-freeze get my two thumbs up normally I run about 60-40 water to antifreeze mixture…..but I also drain my antifreeze in the late fall so I don’t let the motor sit around 6 plus month with water in it to also avoid a potential freeze problem. I don’t like cracked blocks!!! I installed a quick drain valve in the bottom of the booster so it take about 3 mins to drain the entire engine.

NJ Farmer

[outdoors4evr]

Most antifreeze instructions recommend a 50:50 mix of water to antifreeze. In most places (not sure of your location) this is adequate protection against freezing.
Should your location be northern Canada, Alaska, Siberia, or perhaps Antarctica a larger content of antifreeze would be recommended.

[Stanton]

What brands do people suggest for coolant? Any to avoid? I have some for my Subaru “in stock” thoughts on using that? Appreciate the help

Usually use the (green) antifreeze from O'Reilly (their brand) at a 50/50 mix. Be sure to mix your antifreeze BEFORE you pour it in. Don't count on the Cub's abilities to ensure adequate mixing.

[outdoors4evr]

Be careful... They sell some as full strength that you would mix and they also sell Pre-Mix (50/50).
If you purchase the Pre-Mix, don't thin it further.

[Clemsonfor]

What's farmall's recommend mix ratio? I am big into the classic yanmars. The 1500 and smaller ones ran a thermosyphon system as well and it is not recommended to go over a 25% coolant ratio and at least 75% water for the movement of the coolant. So like 90/10 water antifreeze is good but not 50/50. It has been shown many times on our forum that tractors running too much antifreeze overheat. Do these tractors suffer the same issue? The cub holds way more coolant than the Yanmar 1500 though...it only holds about a gallon.

[radioguy41]

50/50 is the sweet spot. 90/10 would beg the question "Why bother?". If AF content goes beyond 50% the coolants ability to cool goes down which can cause overheating. More water = better cooling, more AF = better freezing protection. The optimum balance point is a 50/50 mix.

[Gary Dotson]

25% might work for you in S. Carolina but not so well up here in the Northern states. For 31 years, I had a thermo syphen Kubota. It was quite happy with 50/50 mixture. That’s the “go to” ratio in this part of the country.

[Clemsonfor]

50/50 is the sweet spot. 90/10 would beg the question "Why bother?". If AF content goes beyond 50% the coolants ability to cool goes down which can cause overheating. More water = better cooling, more AF = better freezing protection. The optimum balance point is a 50/50 mix.

You get some rust prevention abilities and lubricity. But the sweet spot on those little yanmars is 25/75 with the latter being water

[Clemsonfor]

25% might work for you in S. Carolina but not so well up here in the Northern states. For 31 years, I had a thermo syphen Kubota. It was quite happy with 50/50 mixture. That’s the “go to” ratio in this part of the country.

Yea this obviously isn't for year round protection in the northern states. This provides a little protection if you leave it in the tractor but also allows you to not overheat when your bush hogging and it's 98F outside with 80% humidity. These things (the classic yanmars)are know to blow head gaskets if run hot too long.