Due to all the thunderstorm rain this week, the grass grew quite a bit, and one of my coworkers and one of my best friends were both hit by tornadoes this week, so my chainsaw is on loan right now, and thankfully both of them and their houses are ok, except for all of the new firewood laying on the ground, but we've had some pretty wild weather here in the Mid-Atlantic this week.
Enough about the weather, but with all of the fresh growth, I decided to do the whole lawn this week with the 125 to really try her out and compare notes with my 129, which really has been my workhorse around here. I did a bit of mowing with it before, and my Dad cut the entire back yard with it last week, about an acre of grass, but the grass was dry and light. This was the perfect chance to compare them head to head.
The first thing I noticed when I filled the tank with gas and checked the oil was that the oil was almost down to the add mark. I filled the crankcase but made a note of it. I had caught a whiff of blowby in earlier excursions, and a slight puff of smoke when I started it up. Nonetheless, the engine was run hard and ran well for the 2 hours and 15 minutes it took to mow the lawn. I can knock out the lawn under similar conditions in about 2 hours with the 129, but it has a 48 inch deck, rather than the 42 on my 125.
Speaking of mower decks, one thing I needed to get used to on the 125 was the fact that the mower deck doesn't stick out as far to the side, and I have to crane my neck a bit to see exactly where the edge of the deck is when working along a fence or other border areas. I took out 2 boards on my neighbors fence, but repaired them before he suspected a thing. I think the 129 has a slight edge here.
One thing I did like about the 125 is I can get closer to my line of Leyland Cypress without having to worry about the branches pulling the PTO lever to the off position as frequently happens with my 129 when I get in close. Cut quality was about the same, though I have my default cut height on the 129 preset, I use a detent on the 125 or else it cuts too short.
Both the 125 and the 129 have issues with the linkages on the Hydro units, and it seems like the friction control on the Hydro lever needs to be adjusted on the 125, the linkage needs lubrication, and the trunion needs to be welded up and tightened up. The steering box and linkages were surprisingly tight as in not very sloppy for a more or less original looking 125, which I am pleased about, but the steering seemed to stiffen up as I got within a half a turn of lock. I probably need to pull the steering box and go over it, but I think all it really needs is a good cleaning out and repacking with grease, with perhaps the plate straightened a bit and other minor adjustments as well.
As the grass cutting wore on, I noticed that the engine didn't have quite as much "guts" as my 129 when it got into the heavy stuff or climbing hills, despite the fact that it didn't have 100 extra pounds of wheel weights on it and a smaller mower deck. I noticed the smell of blowby as well when the going got tough. My suspicions that the engine wasn't quite as fresh as I initially thought were confirmed when I looked at the dipstick when I got back to the garage. In 2 hours of mowing, it used a little more than half a pint of oil, a good bit more than my 129, which doesn't use that much oil in a month.
Mechanical condition being equal between the 125 and the 129, I would have to give the 129 a slight edge over the 125, but both are more pleasant to mow with than the Simplicity Sunrunner I have.
The 125 is going to need a good going over. Although the engine could probably go a few more seasons, its probably a good idea to pull it out after mowing season and freshen it up a bit with a light honing, some new rings, and a good valve lapping. Hopefully the bore will still be within or at least pretty close to being within tolerance. That's the main thing,
I've already covered the steering and the hydro linkage issues, and really, there isn't a whole lot else wrong with it.