Adding weight is only a solution if any slippage is occurring. That variable needs to be absolutely ruled in or out.
When I go up the hill backwards, then my tires slip on the yard.
And I have the gouge marks to prove it. This is not what happens when going forward.
When going forward, the tractor just stops, or inches (literally) along at a snail's pace. So I would say that, by all accounts, the tires are not slipping.
If nothing is actually slipping, then the problem is either in the transmission or the engine. What you might think is normal engine sound others might describe as a problem.
I'm certainly no expert on tractor engines, but I will say that this engine, in my opinion, is running about as well as any engine could, much less one that's over 45 years old. There is no smoke, she starts pretty much every time and sounds/feels smooth. I dare say it runs better than my truck. However, as I stated, I'm no expert on tractor engines.
That indicates to me an engine problem.
Well, ok. I'm in no position to disagree, other than to state what I already have.
It could be in the ignition, as my power problem was, or it could be in the governor (if it has one )/ fuel problem.
Some time back (as in two-or-so years ago) there was an issue with, as I recall, the jet on the carburetor. I got online to a help site and a guy sent me a manual for that (or similar) carb and walked me through things to look for. I ended up fixing it myself (with his help, of course) and it's run without (obvious) issue since. So again, I'm just having a hard time seeing the issue as being engine-related. But again....
You also may want to check the engine compression.
Ugh. I'll look elsewhere first...lol.
I decided that all of this was good cause for me to actually go through the operator's manual for the tractor (a first, yes). The first thing that caught my eye was transmission fluid. I checked the level and it was "LOW," as in "I couldn't see any." I figured that if I couldn't see it and that whomever had the tractor before I did probably never changed the oil, it was time to change it. So I drained it, and actually got a lot more than I thought I would. It also had that two-color thing going for it...you know...a little milky white streak in it, and pretty much NO (apparent) viscosity.
In looking at what oil to put into it, some 45 years later, the manual said "SAE 90." Well, little did I know that there (apparently) is no such thing as "SAE 90" oil anymore. So I asked at the store what would be the replacement oil, and was told "80W-90" was the closest I was going to get to "SAE 90." So, I bought it.
But I would dearly love to get input from others on this topic: did I pick the correct oil? (And, is it likely to make any difference in my "no-go" situation?)
Anyway, that's where it stands now. (Fun, fun...fun!)