How we verify fitment

A primary source is a document published by the manufacturer of the equipment or the engine: an official parts listing, a parts catalog, an operator’s manual, or a manufacturer product page. These are the only sources that can carry a page to publication on their own.

Retailer listings, aggregator sites, and forum posts are not primary. They can corroborate, but they are frequently wrong — during the research for this site, a search result confidently gave a blade part number for a Toro mower that does not appear on Toro’s own parts page for that machine. We record what the manufacturer publishes.

We do not copy manufacturer tables, diagrams, or text. We record the facts — a part number listed against a machine — and cite where we read it.

Every part-to-machine relationship gets one of four statuses, and each one means something specific.

✓Confirmed fit

The manufacturer lists this part for this machine, and we have read that listing ourselves. The evidence is quoted on the page.

!Conditional fit

It fits, but something has to be true first — a serial range, a deck size, a variant. The condition is always stated. A conditional fit with no stated condition is not allowed to exist in our data; the schema rejects it.

?Not verified

We have not verified this either way. This is a real, useful answer and we publish it rather than staying silent — silence reads as compatibility. Absence from a parts listing is not proof that a part does not fit.

×Does not fit

We have a source indicating it does not fit.

A model number identifies a machine. A serial number identifies a production run. Manufacturers change suppliers and revise designs mid-model, and they publish separate parts listings to match.

The Toro 20340 is a working example. Toro publishes two parts listings for it. The blade part number is the same in both. The engine maintenance kit is not. Anyone answering “what maintenance kit fits a 20340?” without asking for the serial number is guessing on behalf of the reader.

So fitment is recorded per serial range wherever the source distinguishes them.

Category pages — “which blades fit the Toro 20340” — only get published when all of the following hold. Otherwise the page is served noindex, kept out of the sitemap, and the reader is pointed to the model hub instead.

• At least 1 confirmed fitment.
• At least one primary source behind those fitments.
• Every fitment verified within the last 365 days.
• An original written analysis of at least 120 words, specific to that machine and that part category.
• At least 2 concrete decision factors — the measurements or codes that actually settle the purchase.

These are enforced in code, not by checklist. A page that fails any of them cannot enter the sitemap even if someone wants it to.

We do not display a price unless it came from an authorized source and was fetched within the last 24 hours. Outside that window the figure is suppressed and the link reads “Check price at …”, which is always true.

At present no authorized price feed is connected, so no price is shown anywhere on this site.

Always confirm a part against your own model and serial number before buying. Nothing on this site replaces that check.