Summary of Contents for FNA CRX680
- Page 1 CRX680/CRX750 If your engine is not working properly or if there are parts missing or broken, please DO NOT RETURN IT TO THE PLACE OF PURCHASE. Contact our Customer Service Department at 1-877-362-4271 or cservice@fna-group.com 7118266 Rev B JULY 2022...
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- Page 6 This engine is equipped with a spark arresting muffler. If the engine will be used around flammable materials or on land covered with materials such as agricultural crops, forest, brush, grass or other similar items, then a USDA Forest Service spark arrester must be installed.
- Page 7 DO NOT touch hot surfaces while operating or just after stopping the engine. Avoid contact with hot exhaust gases. 3-ENG...
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- Page 9 Exhaust port / Spark Arrester Static screen Spark plug Throttle lever(If equipped) Oil cooler Oil fill cap Oil filter Cylinder head cover Air filter cover Dipstick Choke control Starting motor Control box / Key start / Muffler with heat shield Choke control Crankshaft 5-ENG...
- Page 10 Allow three feet of clearance on all sides of the engine while operating it outdoors. 6-ENG...
- Page 11 Remove any excessive dirt or debris, especially around the muffler and static guard. 7-ENG...
- Page 12 Oil is a major factor affecting performance and service life. Use SAE 10W-30 API SG or newer automotive detergent oil as recommended in the MAINTENANCE section of this manual. Only run the engine on a level surface. The engine is equipped with a low oil level sensor.
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- Page 14 The starting position of the If the engine fails to start after choke will vary depending on three attempts, verify that the the engine temperature. To start engine is on a level surface a cold engine, pull the choke and the oil level is maintained fully to the “CLOSED”...
- Page 15 Once the engine starts, push the choke to the “OPEN” position. If the engine does not Use the throttle lever (if run smoothly, pull the choke equipped) to adjust the engine midway between the “OPEN” speed to the requirement of and “CLOSED”...
- Page 16 The engine starter requires the electrical system to be started or powered by a 12-volt (V) If you need to stop the engine in battery with a minimum capacity an emergency, simply turn the of 21 ampere-hours (Ah). The key to “OFF”. For a normal positive (+) lead from the shutdown, first move the throttle battery connects to the positive...
- Page 17 If the engine will not be used for a period of two months or more, drain the fuel system into an approved container. Store the engine in a cool, dry location. • Disconnect the black, negative (-) battery lead. • See Section VI, Storage and Transportation.
- Page 18 Note 2: Before each season, then follow the prescribed service interval. Note 3: Service more frequently when operating the engine under severe, dusty and/or dirty conditions. 14-ENG...
- Page 19 SAE 10W-30 API SG or newer automotive detergent oil is recommended for general, all- temperature use. Other viscosities shown in the chart may be used when the average temperature in your area is within the indicated range. 2. Remove the oil fill cap. Fill using oil of the proper recommended type.
- Page 20 1. Place an appropriate container below the oil drain bolt. Remove the oil filler cap. Next, using a wrench, loosen the drain bolt counterclockwise. Once loose, fully unthread the bolt with your fingers removing it and the bolt gasket. 2. When the oil is completely drained, inspect the drain bolt gasket for damage;...
- Page 21 5. Paper filter element: Brush way any debris thoroughly before reinstalling the filter. Replace the element if it is heavily soiled. 7. Reinstall air filter cover: a. Lean the cover against the base as illustrated below. Push the cover forward until the tabs slip The air filter element and filter into the mating slots.
- Page 22 1.Recommended spark plugs: F6RTC. Always replace the The air cleaner is a critical spark plugs in pairs. emission related component 2. Use of a non-recommended and should not be altered or spark plug style may cause modified in any way. damage to the engine.
- Page 23 b) Slight amount of buildup on the electrodes can be cleaned with a wire brush. Replace the plug if heavily soiled. Spark plug(s) that look wet, oily or have extreme electrode wear 15-18 ft. lb. (20 – 25 N.m) indicate the engine needs to be serviced by a trained small engine technician.
- Page 24 Choke is open starting process. If your engine is not working properly or if there are parts missing or broken,please DO NOT RETURN IT TO THE PLACE OF PURCHASE. Contact our Customer Service Department at 1-877- 362-4271 or cservice@fna-group.com. 20-ENG...
- Page 25 5. Disconnect the negative (-) battery lead. Wipe the engine of any dirt and debris. Turn the fuel valve to “OFF” or “Closed” (if equipped). 1. Allow a hot engine to cool. 2. Change the oil while the engine is warm. 4.
- Page 26 CRX680 CRX750 Type Piston diameter (mm) 8.5:1 8.8:1 Rated power (kW) CI 14.5/3600 per CI 16.0/3600 per SAE J1349 Net Power SAE J1349 Net Power Counterclockwise (While viewing the PTO) Intake 0.004 – 0.006” (0.10 – 0.15mm) Exhaust 0.006 – 0.008”...
- Page 27 2.Case cover installation dimension 23-ENG...
- Page 28 CRX680/CRX750 electrical schematic 24-ENG...
- Page 29 The FNA Group’s only liability shall be the repair or replacement of parts as stated above. In no event shall the FNA Group be responsible for any losses or damages that are indirect, consequential, punitive, special, exemplary, or for economic loss, commercial loss, lost revenues, lost profits, or lost business opportunities,...
- Page 30 (SORE). In California, new small off-road engines must be designed, built and equipped to meet the State’s stringent anti-smog standards. FNA must warrant the exhaust emission control system on your SORE for the periods of time listed below provided there has been no abuse, neglect or improper maintenance of your small off-road engine.
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