This comprehensive workshop service repair manual provides detailed instructions and illustrations for servicing and repairing Generac GTV-990 and GTV-760 OHVI engines. The manual covers a wide range of topics, including:

* **Safety Regulations:** Ensuring safe operation practices during all maintenance and repair procedures.
* **Engine Dimensions and Features:** Providing detailed specifications and characteristics of the GTV-990 and GTV-760 engines.
* **4-Cycle Engine Theory:** Explaining the fundamental principles of how 4-cycle engines operate.
* **General Information:** Offering essential information about the engines, including torque specifications and general maintenance guidelines.
* **Ignition System:** Detailed instructions on inspecting, troubleshooting, and repairing the ignition system, including components like spark plugs, ignition coils, and wiring.
* **Carburetor System:** Guidance on servicing and adjusting the carburetor for optimal engine performance.
* **Governor Controls and Governor:** Instructions on understanding and adjusting the governor system for proper engine speed regulation.
* **Cylinder Head and Valves:** Detailed procedures for inspecting, removing, and reinstalling cylinder heads and valves, including valve adjustments.
* **Electric Starter:** Information on diagnosing and repairing the electric starter system.
* **Alternator System:** Explaining the alternator system's operation and how to troubleshoot and repair it.
* **Lubrication System:** Guidance on maintaining and troubleshooting the engine's lubrication system.
* **Engine Disassembly:** Step-by-step instructions on disassembling the engine for repair purposes.
* **Cylinder & Crankcase Cover:** Detailed procedures for removing, inspecting, and reinstalling the cylinder and crankcase covers.
* **Crankshaft & Camshaft:** Instructions for inspecting, repairing, and assembling the crankshaft and camshaft.
* **Piston & Rings:** Procedures for inspecting, replacing, and assembling pistons and rings.
* **Connecting Rod Inspection & Assembly:** Guidance on inspecting and assembling connecting rods.
* **Engine Assembly:** Comprehensive instructions on reassembling the engine after repair or maintenance.
* **Wire Harness:** Information on inspecting and repairing the engine's wiring harness.


This manual is designed for both DIY enthusiasts and experienced mechanics, providing clear instructions and detailed illustrations to guide you through every step of the repair process.

The GENERAC GTV-990 and GTV-760 are robust, high-performance gasoline engines designed for a wide range of applications. These OHVI (overhead valve, inline) engines are known for their reliability, durability, and efficiency. They are commonly used in generators, pumps, compressors, and other equipment demanding dependable power output. Both models are part of Generac's renowned GTV series, recognized for its advanced engineering and commitment to providing reliable and powerful engines for various industries.

The GTV-990 and GTV-760 engines are distinguished by their respective displacement capacities. The GTV-990 boasts a larger 990cc displacement, delivering higher power output than the GTV-760, which has a 760cc displacement. Both engines share core features like cast iron cylinder sleeves for increased durability, a single-cylinder configuration, and a balanced crankshaft for smooth operation. The GTV-990 and GTV-760 are equipped with a recoil starter for easy operation, and their fuel systems provide efficient fuel consumption. These features, combined with GENERAC's commitment to quality control, ensure these engines deliver years of reliable operation in demanding environments.