The Lawn-Boy 10604 is a self-propelled gas mower with a 20” steel deck. The rear wheel drive ensures the mower can climb fairly steep inclines without any problems. You can also adjust the speed the mower is propelled forward to fit your walking pace. Adjust the cutting height on all four wheels to get the cut you want.
- Kohler 149cc gas engine.
- 20” cutting width.
- Variable speed.
- Adjustable cutting height.
- 3-in-1: mulch, bag and side discharge.
- Non-CARB compliant.
- 2 year full warranty.
Lawn-Boy 10604 review
After my old gas powered lawn mower died I bought this Lawn-Boy 10604 since it had received lots of good reviews and fitted my needs. I wanted a mower that was self-propelled and powerful enough to handle thick grass and weeds in my uneven yard.
The mower has a 20” steel deck that is both lightweight and sturdy. The 20 inch cutting width lets me mow my medium sized lawn efficiently without making the mower too big for some of the narrow paths in my backyard. I would say this mower fits best for medium and maybe large sized lawn. For smaller lawns it might be just too bulky and difficult to turn in tight spots.
The Lawn-Boy 10604 comes more or less fully assembled in the box. It took me only about 10 minutes to get the mower out of the box and start cutting grass. You get a bottle of engine oil in the box, but you need to provide gasoline yourself.
Kohler gas engine
The Lawn-Boy 10604 has a Kohler 149cc 6 ½ gross torque engine with overhead valves. There is no manual choke or primer ball, all you have to do is squeeze the engine bail and pull. The automatic choke ensures the engine starts with the first pull even when it is cold. I was quite surprised how easy it was to pull; it feels like it is not any resistance at all.
Self-propelled with variable speed
The self-propulsion works great and the rear wheel drive has no problem pushing the mower up the steep inclines in my backyard. The mower literally does all the work and I just guide it.
A front wheel drive would most likely have struggled to climb up the inclines, but they are a bit easier to maneuver. It took me a few tries to figure out how make the turns go smoothly with this one. Now, I let go of the self-propulsion bail before the turn and squeeze it in again when the turn is made.
You can adjust the speed as well. The variable speed allows you to set a pace from really slow to full speed which makes you have to almost run behind the mower.
Adjustable cutting height
The cutting height can be adjusted with 7 different settings which ranges from 1 inch to 4 inches. It is a bit of a hassle to change the cutting height since you have to adjust each wheel separately. I tend to let the height stay on one setting, but occasionally adjust it up a notch if I have been gone for more than a week.
You can either choose to mulch or bag the clipping with this Lawn-Boy mower. If you really want to use the option of discharging the clippings to the side you need to buy an additional part and attach it. I haven’t done it and I am not going to do it either since I usually bag my clippings.
The bagging option works alright, but I think the bag is too small. The mower picks up literally all the clippings and the bag fills up quickly. It lets me pick up leaves during the fall as well. The only problem I have had with the bagging system is that the grass clogs up the entrance of the bag when the grass is wet or damp.
I mulch my lawn maybe once a month to give it some natural fertilizer. The mower mulch very well thanks to the dome shaped deck accompanied with the tri-cut blade. The mulch is spread evenly without any signs of pile ups.
- The engine starts usually on first pull.
- Climbs the inclines in my yard with ease.
- Reasonable priced.
- Making turns take time to get used to.
- A hassle to change the cutting height.