Description

Bolens 1666 1981 Parts Catalog

If you are restoring a Bolens 1666 (QT-17) tractor and chasing part numbers off some internet forum, stop. You need the factory book. This is the original 1981 Bolens Parts Catalog. 23 pages of exploded views and exact part numbers. I’ve seen too many guys order the wrong side panel because they guessed. The manual lists 1742142 for the R.H. Side Panel. You do not guess.

Bolens 1666 Parts Catalog: What You Get

The catalog covers the complete 17 HP tractor model 1666, serial numbers 0600101 through 1099999. It includes the trim assembly (Figure 1) on page 2, with 50+ part numbers for the grille, hood, decals, side panels, fenders, and hardware. Every part is referenced with the original Bolens part number. You also get the common hardware note at the bottom of the parts list: “Common Hardware – Purchase Locally (Grade 5 where applicable)”. That saves you money on bolts and nuts you can buy at any hardware store. No need to order those from Bolens. The catalog also covers the engine mounts, idler pulley, shock absorbers, and all the small fasteners. The exploded view on page 2 is especially useful for trim pieces. Many of these parts are hard to find now, so having the correct part number is critical.

23 Pages of Factory Part Numbers

This is not some third-party compilation. It was published by Bolens in December 1981, form number P553412-3, superseding P553412-2. The document is 23 pages of black-and-white line drawings and tables. Each page is a clean scan of the original. You get the exact quantities and descriptions. For example, the stud harness is part 1725147, and you need four of them. The lock nut is 1724101. You won’t find that level of detail on a parts lookup website.

Why Aftermarket Part Lists Fail

Aftermarket part catalogs often combine multiple models into one diagram. They might list a part that fits the 1660 but not the 1666. The 1666 has a specific grille screen (1736536) and hood decal (1739112) that differ from other models. Using the wrong parts means wasted time and money. This OEM catalog removes all doubt. You see the exact part for your serial number range.

Trim Assembly: Page 2 Exploded View

Page 2 of the catalog shows the trim assembly with reference numbers 1 through 50. It starts with acoustic foam (1724588) and goes through the engine mount assembly (1733889) and shock absorber (1736356). Each part is listed with its part number and quantity required. The decal set includes left and right identification decals (1736196, 1736197) and fender decals (1736289, 1736290). If you’re missing a decal, you have the number right here.

How to Use This Parts Catalog

Find your tractor’s serial number on the frame. The catalog covers 0600101 through 1099999. Then locate the section you need — engine, transmission, sheet metal, etc. The book is organized by assembly groups. Each group has a figure number. Cross-reference the part number against the list. Then order from a dealer or online with confidence. I recommend you access the PDF and keep it on your tablet in the shop. No need to flip through paper.

Common Hardware: Know When to Buy Local

Look at the bottom of the parts list on page 3. Bolens explicitly says “Common Hardware – Purchase Locally (Grade 5 where applicable)”. That means hex screws, nuts, lockwashers, and such can be bought at any fastener supplier. You don’t need to pay OEM markup for a 1/4-20 hex screw. But for the unique items like the pivot rod (1736340) or the idler pulley (1733889), you need the factory part.

For background on the automotive and small engine industry, see Automotive Industry Overview. The principles of parts standardization apply here.

The Automotive Industry Overview also confirms that OEM documentation reduces errors in repair and restoration.

Related Manuals

If you need parts for similar Bolens tractor models, check these related factory manuals:

• FMC Bolens Model 1666 Tractor Parts List
• FMC Bolens 1660 Tractor Parts List with 16 HP Kohler Engine
• FMC BOLENS Tractor 10 HP Model 1055 Parts List

Frequently Asked Questions

Does this manual include repair procedures?

No, this is a parts catalog only.

Is this the original factory manual?

Yes, it’s the official Bolens factory parts list published in 1981. The document number is P553412-3, which supersedes P553412-2. Every part number listed here was verified by the manufacturer at the time of production. This is not a reprint or a third-party scan; it’s a direct copy of the original manual. You’ll see the exact part numbers for the acoustic foam, side panels, decals, grille, hood assembly, and all hardware. The manual includes notes like ‘Common Hardware – Purchase Locally’ to save you money on easy-to-find fasteners. Plus, it lists the correct quantities and references for each part. This is what you need to order the right parts for your 1666 tractor.

Are the diagrams clear?

They are factory line drawings. You’ll see each part with a reference number and description. At 23 pages, it’s concise.

What if I need a service manual?

This parts catalog complements a service manual. For repair procedures, look for a separate factory service manual. The parts catalog gives you the exact part numbers so you don’t order wrong components. Many DIY owners find that having both saves time.

Do not waste time on generic parts numbers. Get the real thing. Access the Factory Manual and keep it on your bench.