Lawn and Garden tractorsSpec sheet
Bolens HT20
The Bolens HT20 is a compact lawn and garden tractor that was made from 1973 to 1978. It's a 2-wheel drive machine with manual steering, perfect for small yards and gardens. The tractor has a Kohler K532 engine with two cylinders and runs on gasoline. This engine is air-cooled and naturally aspirated, which means it doesn't need extra parts to push air into it. The HT20 is quite powerful for its size, with 19.5 horsepower. It has a very high engine displacement for its class, which means it can handle tough jobs well. The tractor is small but heavy, measuring about 75 inches long, 38 inches wide, and 45 inches tall. It weighs 1091 pounds, which is above average for similar tractors. The HT20 has lawn and turf tires, an open operator station, and an electric starter. It also has a 5-gallon fuel tank and disc brakes for good stopping power.
ManufacturerBolensPower19.5 hp(14.5 kW)ClassUnder 25 HP tractors →Engine2-cylinderTransmissionShaft-driven hydrostatic
Key specifications
- Category
- Lawn and Garden
- Engine power
- 20hp
- Operating weight
- 1,091 lb
- Transmission
- Shaft-driven hydrostatic
Category comparison
HT20 compared with its category
vs. Lawn and Garden medianDistribution
Engine Power (hp)
All recorded Lawn and Garden tractors
19.5 hp · 54th
This model
4
Median 18 hp
28
This modelLawn and Garden tractorsMediann = 380
The HT20 ranks at the 54th percentile for engine power among recorded lawn and garden tractors.
Overview
About the Bolens HT20
The Bolens HT20 is a compact lawn and garden tractor that was made from 1973 to 1978. It's a 2-wheel drive machine with manual steering, perfect for small yards and gardens. The tractor has a Kohler K532 engine with two cylinders and runs on gasoline. This engine is air-cooled and naturally aspirated, which means it doesn't need extra parts to push air into it. The HT20 is quite powerful for its size, with 19.5 horsepower. It has a very high engine displacement for its class, which means it can handle tough jobs well. The tractor is small but heavy, measuring about 75 inches long, 38 inches wide, and 45 inches tall. It weighs 1091 pounds, which is above average for similar tractors. The HT20 has lawn and turf tires, an open operator station, and an electric starter. It also has a 5-gallon fuel tank and disc brakes for good stopping power.
Full specifications
Recorded specifications
General
| Manufacturer | Bolens |
|---|---|
| Model | HT20 |
| Category | Lawn and Garden tractor |
| Type | 4x2 |
| Years built | 1973–1978 |
| Operating weight | 1,091lb(494.9 kg) |
Engine
| Make | Kohler |
|---|---|
| Model | K532 |
| Power | 19.5hp(14.54 kW) |
| Cylinders | 2 |
| Displacement | 53.7ci(0.88 L) |
| Bore | 3.37in(85.6 mm) |
| Stroke | 3in(76.2 mm) |
Transmission
| Type | Shaft-driven hydrostatic |
|---|
Chassis & drive
| Chassis | 4x2 |
|---|---|
| Drive | 2WD |
| Steering | Manual |
| Cab | Open operator station |
Dimensions
| Length | 74.8in(1,900 mm) |
|---|---|
| Width | 37.8in(960.1 mm) |
| Height | 44.9in(1,140 mm) |
| Operating weight | 1,091lb(494.9 kg) |
Closest alternatives
HT20 compared with the nearest models by horsepower
Among lawn and garden tractors, the Simplicity 9020 PowrMax and the Iseki TM3200 Mech are closest to the Bolens HT20 in rated horsepower. The Simplicity 9020 PowrMax matches it on rated power and weighs 210 lb more, at 67 lb per horsepower against 56 lb. The Iseki TM3200 Mech matches it on rated power and weighs 340 lb more, so it carries more weight per horsepower, which helps traction in draft work. Of the 3 models, the HT20 has the lowest weight per horsepower at 56 lb per hp.
| Spec | Bolens HT20 | Simplicity 9020 PowrMax | Iseki TM3200 Mech |
|---|---|---|---|
| Engine power | 19.5 hp14.5 kW | 19.5 hp14.5 kW | 19.5 hp14.5 kW |
| Operating weight | 1,091 lb495 kg | 1,299 lb589 kg | 1,433 lb650 kg |
| Weight per hp | 56 lb/hp34 kg/kW | 67 lb/hp41 kg/kW | 73 lb/hp45 kg/kW |
| Displacement | 53.7 ci0.88 L | 49.8 ci0.82 L | 68.6 ci1.12 L |
| Cylinders | 2 | 2 | 3 |
| Transmission | Shaft-driven hydrostatic | Hydrostatic | - |
| Drive | 2WD | 2WD | - |
| Years built | 1973-1978 | 1975-1980 | - |
Calculators
Calculators for the HT20
PTO power
About 16 to 18 PTO hp
Estimated from the 19.5 hp engine rating. The calculator also estimates drawbar power by surface.
Implement sizing
Implements a 19.5 hp tractor can run
The calculator sizes mowers, tillers, discs, plows and balers for this tractor.
Ballast
65 lb per PTO hp as listed
Heavy draft work calls for 130 to 150 lb/hp. The calculator gives the ballast to add.
Units
19.5 hp is 14.5 kW
The converter gives kW and metric PS values, as used on European spec sheets.
Parts and manuals
Parts and manuals for the Bolens HT20
Each link opens a retailer search keyed to the fields recorded for this model. Confirm fitment against the serial plate before ordering.
Filters
- Oil filter for the Kohler K532Amazon
Fits the Kohler K532 2-cylinder gasoline engine listed for this model. Confirm the part number against the engine serial plate.
- Air filter for the Kohler K532Amazon
Fits the Kohler K532 2-cylinder gasoline engine listed for this model. Confirm the part number against the engine serial plate.
- Fuel filter for the Kohler K532Amazon
Fits the Kohler K532 2-cylinder gasoline engine listed for this model. Confirm the part number against the engine serial plate.
- Hydraulic filter for the Kohler K532Amazon
Fits the Kohler K532 2-cylinder gasoline engine listed for this model. Confirm the part number against the engine serial plate.
Manuals
- Bolens HT20 service and repair manualseManualOnline
Digital manuals. Built 1973 to 1978. Check the serial number range on the listing.
- Bolens HT20 operator's manualAmazon
Printed and reprint manuals. Built 1973 to 1978. Check the serial number range on the listing.
- Bolens HT20 service manualAmazon
Shop and repair manuals for this model.
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Category medians
HT20 vs. Lawn and Garden median
Bolens HT20 compared with other Lawn and Garden tractors
| Spec | This model | Lawn and Garden median | Difference | Percentile |
|---|---|---|---|---|
| Engine Power | 19.5 hp | 18 hp | +8% | 54th |
| Engine Displacement | 53.7 ci | 41.1 ci | +31% | 76th |
| Cylinders | 2 | 2 | at median | 50th |
| Operating Weight | 1,091 lb | 738 lb | +48% | 66th |
| Length | 74.8 in | 71.7 in | +4% | 66th |
| Width | 37.8 in | 43.3 in | -13% | 32nd |
| Height | 44.9 in | 42.9 in | +5% | 64th |
Medians and percentiles are calculated from the lawn and garden tractors in the database that have a recorded value for each specification (sample size 269–380 models).
Same manufacturer
Other Bolens models
Other manufacturers
Models with similar horsepower
Gallery
Bolens HT20 photos
FAQ
Frequently asked questions
When was the Bolens HT20 in production?
Bolens HT20 production started in 1973 and ended in 1978.
How much horsepower does the Bolens HT20 have?
The Bolens HT20 produces 19.5 hp from its 2-cylinder engine. Engine displacement is 53.7 ci.
How much does the Bolens HT20 weigh?
The Bolens HT20 weighs about 1,091 lb in operating condition.
What transmission is in the Bolens HT20?
Transmission on the Bolens HT20 is Shaft-driven hydrostatic.
What three-point hitch category does the Bolens HT20 use?
The Bolens HT20 has a Category 0 three-point hitch.
What maintenance does the Bolens HT20 require?
The Bolens HT20 needs periodic engine oil and filter changes, hydraulic fluid checks, and regular greasing and inspection. The owner's manual lists the manufacturer's recommended service intervals.