Description

Kohler CV17, CV26, CV620, CV750 Service Manual – Factory Torque Specs and Disassembly

I’ve torqued enough head bolts to fill a dumpster. If you’re fighting a Kohler CV17, CV26, CV620, or CV750 Command engine that won’t start, blows smoke, or drops oil pressure, the last thing you need is a generic book that tells you to “refer to dealer.” This factory Service Manual runs 230 pages of what Kohler actually wants on your bench. No rewritten aftermarket condensation. No missing pages. Just the OEM print.

Section 3 Troubleshooting – Why You’ll Use It Before Coffee

Every CV-series engine has its quirks. The manual’s Section 3 walks you through spark, fuel, and compression checks in the order Kohler’s engineers designed. You get a flowchart that starts at “engine cranks but won’t start” and ends at “replace component X.” The diagnostic steps include specific ohm readings for ignition coils and fuel solenoid resistances. This isn’t a hint – it’s a factory procedure.

What Torque Values Are Listed in This Manual?

Head bolts, connecting rods, flywheel nuts – all in ft-lbs and in-lbs. The manual gives both the initial tightening pass and the final angle (if applicable). For example, the CV26 connecting rod cap bolts call for a specific torque range that, if you miss by 5 ft-lbs, you’ll spin a bearing. I’ve seen it happen. That spec lives in Section 10, Inspection and Reconditioning. You also get thread locker recommendations and fastener grade callouts.

Two Fuel System Sections – Carb and EFI

Section 5 covers the standard carbureted Fuel System and mechanical governor. Section 5B is the Electronic Fuel Injection (EFI) setup – throttle body, fuel pump pressure test, injector removal. The EFI section includes wiring pinouts for the ECM. If you’ve ever chased a no-start on a CV620 EFI and ended up spraying starter fluid, this section will save you that wasted hour. The manual shows you how to test the fuel pump relay with a multimeter.

Electrical System and Components – Section 8 Breakdown

Section 8 is the electrical bible for these engines. Charging coil outputs, rectifier-regulator tests, starter motor disassembly, and the entire wiring harness diagram. It also covers the kill circuit – a common failure point on mowers where the engine dies after start. The manual lists the exact resistance values between test points. You don’t guess. You measure and compare. If you’re working on a CV750 that has intermittent shutdown, start with Section 8.

Disassembly to Reassembly – Sections 9–11 in One Sweep

Section 9 tells you the order to pull the engine apart – remove the blower housing, then the flywheel, then the crankcase cover. Section 10 is Inspection and Reconditioning: bore wear limits, valve stem clearance, cylinder head flatness. Section 11 is the reassembly sequence. It’s all in one place, so you don’t flip back and forth. The manual specifies which gaskets to replace and the sealant type for the crankcase joint.

Two fuel system sections. That alone saves hours.

Who Needs This Manual – DIYer and Pro Alike

The home garage mechanic who mows three acres and the shop owner who sees three Command engines a week. If you’ve ever had a CV26 that burns oil after a valve job, you know the frustration of missing a torque spec. This manual eliminates that. It’s also for the guy who buys a used zero-turn with a CV620 that’s been flooded and wants to clean the carb correctly. The beginner gets the step order; the pro gets the precision numbers.

Source Authenticity – OEM vs. Aftermarket

This is a direct scan of the Kohler factory publication. The binding is gone, but the content is untouched. Aftermarket manuals often combine two different engine families into one book and call it “compatible.” This manual is specific to three CV17–CV26 and CV620–CV750 vertical crankshafts. Every spec came from Kohler’s engineering department, not a third-party compiler. You can trust the fuel pressure numbers and electrical values because they match the service bulletins.

Related manuals you might need: Kohler CV17, CV26, CV18, CV20, CV22 Service Manual – OEM Factory Specs covers the smaller horizontal engines. Kohler XT-6 XT-7 Service Manual – 84 Pages OEM Factory Specs if you have those utility engines. Kohler OHC 16 HP, OHC 18 HP Service Manual – OEM Factory Specs for overhead cam models.

If you’re also working on a vehicle’s manual transmission, check out this Wikipedia article on manual transmissions for gear ratio basics. And for understanding how clutches engage, this Wikipedia article on manual transmissions covers the theory.

Does this manual cover the EFI models of the CV620 and CV750?

Yes. Section 5B covers the Electronic Fuel Injection system for these engines, including wiring diagrams and fuel pressure specs.

Can I use this manual for a Kohler Command CV740 engine?

No. This 230-page manual is specific to the CV17, CV26, CV620, and CV750 models. The CV740 uses a different block and fuel system layout. Look for the factory manual for that specific model. Using the wrong specs can damage the engine.

You’ve got a Command that’s down. The factory manual is here. Access the Factory Manual – it’s the difference between a Saturday job that goes right and a parts cannon that leaves you waiting on a shipping box.