A new STIHL KM 91 R powerhead typically costs about $400-$500 before tax, while a package with a cutting attachment can bring the total to roughly $500-$700. The final price depends on dealer pricing, the attachment or KombiTool selected, local taxes, and whether the unit is new, used, or bundled.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| New KM 91 R powerhead | $400 | $450 | $500 | Powerhead only; dealer price varies |
| Powerhead with basic attachment | $500 | $600 | $700 | Attachment type affects total |
| Used powerhead | $175 | $300 | $400 | Condition, age, and accessories matter |
| Common KombiTool attachment | $100 | $175 | $250 | Separate purchase; tool dependent |
| Sales tax on a $450 purchase | $0 | $30 | $45 | Depends on local tax rate |
What Does a New KM 91 R Powerhead Cost?
For the KM 91 R alone, a practical U.S. shopping range is about $400-$500, with roughly $450 a reasonable planning figure. The unit is a professional-oriented KombiSystem powerhead, not a complete trimmer, edger, or other finished tool. Its 28.4 cc engine drives compatible attachments, which are generally sold separately.
Dealer quotes may differ from advertised prices because of regional inventory, seasonal promotions, setup, and what is included at checkout. A quote near the lower end may reflect a promotion or a powerhead-only sale; a price toward the upper end may include added items or reflect a higher-cost market. Ask the dealer to identify each included item and any fees.
Assumptions: new KM 91 R powerhead, standard retail purchase, no attachment, no delivery, and tax excluded. The purchase total after tax is commonly around $425-$550, depending on the selling price and local sales-tax rate. A buyer should verify current availability and the exact model designation with a local STIHL dealer.
What Is Included in a KM 91 R Retail Quote?
A quote can look higher than the advertised powerhead price if it includes attachments, setup, or delivery. Separating the powerhead, tools, and added charges is the fastest way to compare dealer offers accurately. The table shows common budget allowances; actual attachment prices vary by model and dealer.
| Quote component | Typical price | What it covers | Common range |
|---|---|---|---|
| KM 91 R powerhead | $400-$500 | Engine, shaft, and controls | Per powerhead |
| Basic attachment | $100-$250 | Tool head, such as an edger or trimmer | Per attachment |
| Additional KombiTool | $100-$300 | Specialty tool for another yard task | Per attachment |
| Delivery or local transport | $0-$50 | Dealer delivery if offered | Per order |
| Sales tax | $0-$45 | Illustration on a $450-$750 taxable purchase | Location dependent |
The powerhead typically carries most of the initial cost, but the first attachment changes what jobs the buyer can perform. A customer who already owns compatible tools may only need the powerhead, while someone starting from scratch should budget for at least one tool head. Assumptions: common retail add-ons; local tax and delivery vary.
How Engine and Attachment Choices Change the Price
The engine model is only one part of the total. A KM 91 R purchase with a single-purpose attachment may stay near $500-$700 before tax, while a setup with several tools can exceed $800. Attachment count and type usually create the largest difference between a powerhead-only quote and a ready-to-work package.
Common KombiTool options include trimmer, edger, hedge-trimmer, pole-pruner, and blower attachments, but prices and compatibility differ. A simple attachment may add around $100-$175; more complex reach or cutting tools can add $200-$300 or more. Confirm that each tool is compatible with the exact KM 91 R and ask whether a guard, blade, line, or other operating item is included.
Package discounts are not guaranteed. A dealer may offer a lower combined price for the powerhead and one or more attachments, but a bundle is only a saving if it contains tools the buyer will use. Compare the bundle total with the powerhead price plus individual tool prices, and check for overlapping tools or required accessories.
Assumptions: approximate retail budgeting for common compatible attachments; specialist tools and bundled promotions can fall outside these ranges. Replacing a missing attachment later can also mean another trip, shipping, or a separate minimum purchase, so the intended tasks should be decided before checkout.
How Engine and Shaft Details Affect a KM 91 R Quote
Model identification and condition help explain quote differences. The KM 91 R is a 28.4 cc KombiSystem powerhead with a loop handle. It should not be priced as a complete dedicated trimmer, nor compared directly with a smaller residential trimmer kit that already includes a cutting head. Compare like for like: engine, included tool, condition, and warranty status.
Used-unit pricing often depends on whether the engine starts cold, idles reliably, accelerates without hesitation, and engages its attachment shaft properly. A machine with a worn starter, damaged fuel lines, missing guard, or poorly maintained carburetor can require repairs that erase an apparent $50-$100 discount. Ask for a cold start and inspect the shaft connection and controls before paying.
Scope also matters. A powerhead-only purchase is a different deal from a package with two attachments, and a new unit with dealer support is not equivalent to an older private-party sale. Verify serial and model details, included parts, and whether any warranty applies to the specific transaction. A used unit may have no transferable warranty.
For repair planning, small fixes can cost about $40-$100 in parts or shop labor, while more involved fuel-system or engine work can reach $150-$300. These are broad service allowances, not model-specific diagnostic quotes. Have a dealer inspect the unit if its operating history is unclear.
Where U.S. Dealer Prices Run Higher or Lower
Regional pricing is shaped by dealer competition, shipping and inventory costs, labor rates, and demand during yard-care season. Use the national shopping range as a starting point, not a guaranteed local price. A $400-$500 powerhead can land below or above that band when a dealer is clearing inventory or when availability is limited.
In a competitive metro area, two or more nearby dealers may make it easier to find a promotion or a bundle. In rural areas, fewer sellers and longer transport distances can reduce price competition. A planning allowance of about 5%-10% above a comparable metro quote is reasonable in some remote markets, but actual differences vary and may be offset by lower local taxes or a dealer promotion.
Seasonal timing can also affect what is available. Spring demand may make popular units or attachments harder to find, while late-season inventory changes can produce discounts. A reasonable comparison is to request two or three written quotes in the same week, with the same powerhead and attachment list. That controls for changing stock and promotional timing.
When comparing prices across state lines, include travel or shipping and check how sales tax is collected. A lower sticker price may not reduce the final bill once delivery, tax, or accessory costs are added. Ask whether setup is included and whether the retailer has a charge for delivery or special ordering.
What Do Common KM 91 R Setups Cost?
These examples show how the total grows when the buyer adds tools. For budgeting, count the powerhead and every attachment separately before adding tax. Figures are planning estimates, not advertised prices or guaranteed dealer packages.
| Setup | Powerhead | Tools and extras | Estimated subtotal |
|---|---|---|---|
| Powerhead only | $400-$500 | $0 | $400-$500 |
| Powerhead plus one basic tool | $400-$500 | $100-$200 | $500-$700 |
| Powerhead plus two tools | $400-$500 | $225-$450 | $625-$950 |
For example, a $450 powerhead plus a $150 attachment totals $600 before tax. At an illustrative 7% tax rate, the checkout total is $642. A second tool costing $225 would bring the pre-tax subtotal to $825 and the same-tax total to $882.75. Actual tax depends on the buyer’s location and the items sold.
Another useful way to review a quote is to calculate the tool cost per job. If an attachment is needed for only one occasional task, renting or hiring that task out may cost less than buying a $200-$300 specialized tool. For frequent use, ownership may make sense, but the decision depends on frequency and storage needs.
Are Used KM 91 R Powerheads Worth the Lower Price?
Used KM 91 R powerheads commonly list around $175-$400, with a middle-of-range planning figure near $300. A lower purchase price is only a saving if the engine and drive system work correctly. Older units in good condition may be a sensible buy, but asking prices do not prove the machine’s value or mechanical health.
Before purchase, inspect the housing, shaft, air filter, fuel lines, and starting system. Confirm that the unit runs at idle and under throttle, and test the attachment connection if possible. Missing covers or tools, hard starting, smoke, leaking fuel, or inconsistent power can justify a lower offer or a decision to walk away.
Estimate the cost of any immediate repairs before comparing a used listing with a new dealer quote. A $250 unit that needs $150 in repairs and a $50 replacement part may cost $450 before tax, close to the price of a new powerhead. The used purchase may still be worthwhile if it includes a valuable compatible attachment, but that tool should be inspected too.
Private sales generally offer less purchase support than a dealer sale. Ask for a receipt and clear model information, and do not assume a manufacturer warranty transfers. If the seller cannot demonstrate a cold start or explain maintenance history, budget for a professional inspection or treat the asking price as higher risk.
When Can a KM 91 R Purchase Cost More?
Several add-ons can move a purchase above the basic $400-$500 powerhead range. Attachments, delivery, repairs, and tax should be treated as separate line items, not hidden in one headline price. A fully equipped setup with multiple tools can reach $700-$950 before tax, depending on attachment choice.
A used purchase may have repair costs, while a new package may carry delivery or setup charges. Some retailers include local setup in the sale; others may quote transport separately. If the unit is ordered from another location, ask whether freight or delivery is charged and whether the quoted amount includes required accessories for the selected tool.
Sales tax is another material difference in final price. On a $600 taxable purchase, a 5%-10% tax rate adds $30-$60. The actual rate is location-specific, and delivery charges or bundled items may be treated differently under local rules. Request an out-the-door figure rather than estimating from the listed price alone.
For any service work, ask for the shop’s diagnostic fee and whether it is credited toward repair. Labor estimates vary by shop and task; a small repair may involve less than an hour, while diagnosis and parts replacement can take longer. Example: 1-2 hours at $75-$125 per hour equals $75-$250 in labor, before parts.
How to Lower the KM 91 R Purchase Price
Start by buying only the powerhead and attachments needed for planned work. Avoid paying for a bundle whose extra tools will sit unused. If several tools are genuinely needed, compare the package price against individual prices and confirm that the bundle discount is real after accessories and tax.
Get written quotes from nearby dealers for the same model and tool list. Request the price before tax, the out-the-door total, and a breakdown of delivery, setup, and accessories. This makes it easier to spot a difference caused by included items rather than a lower base price. A quote comparison is most useful when completed close together, before inventory or promotions change.
Consider late-season availability if the purchase is not urgent. Ask dealers whether they expect a price change on remaining inventory, but do not assume a discount will occur. If the tool is needed immediately, the value of having it for the season may outweigh waiting for a possible markdown.
For occasional jobs, compare the cost of buying a specialty attachment with renting, borrowing, or paying for that task once. For used units, inspect and test before negotiating; document repair needs rather than bargaining based only on age. A careful inspection and a precise tool list can prevent more expense than choosing the lowest advertised price.