Ariens HVZ 915085-2350 Service Manual Page 15
- Page / 53
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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5 - 14
5.1 ENGINE TROUBLESHOOTING
The following troubleshooting chart is to be used to
isolate engine problems and give possible causes and
corrective action responses.
The troubleshooting key is generic and can be used for
several types of engines. Use only those possible
causes and corrective actions that apply to the unit.
SECTION 5 - ENGINE
ENGINE TROUBLESHOOTING
PROBLEM PROBABLE CAUSE CORRECTION
Black Exhaust Restriction in air cleaner Remove obstruction
Poor compression Repair per instructions in manufacturer’s manual
Blocked fuel tank vent Remove obstruction
Incorrect grade of fuel Use fuel recommended in manufacturer’s manual
Leaking cylinder head gasket Replace per instructions in manufacturer’s manual
Sticking valves Repair per instructions in manufacturer’s manual
Worn cylinder bores Repair per instructions in manufacturer’s manual
Broken, worn, or sticking piston rings Repair per instructions in manufacturer’s manual
Blue/White Exhaust Incorrect grade of lubricating oil Use oil recommended in manufacturer’s manual
Poor compression Repair per instructions in manufacturer’s manual
Leaking cylinder head gasket Replace per instructions in manufacturer’s manual
Worn cylinder bores Repair per instructions in manufacturer’s manual
Worn valve stem guides Repair per instructions in manufacturer’s manual
Broken, worn, or sticking piston rings Repair per instructions in manufacturer’s manual
Difficult Starting Restriction in air cleaner Remove obstruction
Low cranking speed Check battery and electrical system (see Electrical)
Cold engine oil Warm engine oil or disconnect transmission drive
belt to increase cranking speed
Controls not in correct operating position Reset controls (see Safety Interlock System)
Blocked fuel feed line Remove obstruction
Faulty fuel lift pump Replace pump
Choked fuel filter Clean or replace filter
Poor compression Repair per instructions in manufacturer’s manual
Blocked fuel tank vent Remove obstruction
Incorrect grade of fuel Use fuel recommended in manufacturer’s manual
Sticking valves Repair per instructions in manufacturer’s manual
Worn cylinder bores Repair per instructions in manufacturer’s manual
Pitted valve stems and seats Repair per instructions in manufacturer’s manual
Broken, worn, or sticking piston rings Repair per instructions in manufacturer’s manual
Erratic Running Restriction in air cleaner Remove obstruction
Controls not in correct operating position Reset controls (see Safety Interlock System)
Blocked fuel feed line Remove obstruction
Faulty fuel lift pump Replace pump
Choked fuel filter Clean or replace filter
Poor compression Repair per instructions in manufacturer’s manual
Blocked fuel tank vent Remove obstruction
Sticking throttle/restricted movement Lubricate or replace
Overheating Allow to cool; determine cause
Sticking valves Repair per instructions in manufacturer’s manual
- Zoom/HVZ 1
- TABLE OF CONTENTS 2
- SECTION 1 - INTRODUCTION 3
- SECTION 2 - SAFETY 4
- SECTION 3 - SPECIFICATIONS 7
- 4.1 CONTROLS AND FEATURES 8
- Remove (Figure 4) 9
- OF MOWER DECK 10
- NEUTRAL ADJUSTMENT 11
- STRAIGHT 12
- 4.9 FRONT AXLE LOCKS 12
- Figure 11 13
- Install bolts here for 13
- P1010066.jpg 14
- SECTION 5 - ENGINE 15
- 5.9 ENGINE REMOVAL 19
- 5.10 ENGINE INSTALLATION 19
- Figure 15 20
- SECTION 6 - MOWER DECK 21
- 6.3 REPLACING THE PTO BELT 22
- SECTION 7 - DRIVE TRAIN 23
- 7.7 HYDRO-GEAR TRANSMISSION 26
- Remove (Figure 20) 27
- SECTION 8 - LIFT SYSTEM 28
- SECTION 9 - STEERING 29
- SECTION 10 - FUEL SYSTEM 30
- 10.2 FUEL PUMP 32
- 10.4 FUEL TANK 32
- 10.5 FUEL TANK REMOVAL 32
- SECTION 11 - ELECTRICAL 33
- 11.3 BATTERY 34
- 11.4 SWITCHES 35
- 11.5 SOLENOID AND RELAYS 36
- 11.6 LIGHTING CIRCUITS 37
- 11.7 FUSES 37
- 11.8 DIODES AND RECTIFIERS 37
- 11.9 ELECTRIC CLUTCH 37
- 11.10 ENGINE ELECTRICAL 38
- COMPONENTS 38
- 11.11 ZOOM/HVZ ELECTRICAL 38
- Yellow / 41
- Optional 41
- Figure 32 42
- Figure 33 43
- Figure 34 44
- Cranking Circuit 45
- Engine Kill Circuit 46
- 11.13 ELECTRICAL SYSTEM 47
- 11.14 CONTINUITY DIAGRAM 48
- SECTION 12 - MOWER ATTACHMENT 49
- SECTION 13 - TROUBLESHOOTING 50
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