HS81 CUT-OFF SAW — TROUBLESHOOTING (ENGINE)

TABLE 4. TROUBLESHOOTING (ENGINE)

SYMPTOM

POSSIBLE CAUSE

SOLUTION

 

 

 

 

Spark plug bridging?

Check gap, insulation or

 

replace spark plug.

 

 

 

 

 

 

Carbon deposit on spark plug?

Clean or replace spark plug.

Difficult to start, "fuel is available, but no

 

 

Short circuit due to deficient spark plug

Check spark plug insulation,

SPARK at spark plug".

insulation?

replace if worn.

 

 

 

 

 

Improper spark plug gap?

Set to proper gap.

 

 

 

 

Ignition coil defective?

Replace ignition coil.

 

 

 

 

ON/OFF switch is shorted?

Check switch wiring, replace

 

switch.

 

 

 

 

 

 

Improper spark gap, points dirty?

Set correct spark gap and

Difficult to start, "fuel is available, and

clean points.

 

 

 

SPARK is present at the spark plug".

Condenser insulation worn or short

Replace condenser.

 

 

circuiting?

 

 

 

 

 

 

Spark plug wire broken or short circuiting?

Replace defective spark plug

 

wiring.

 

 

 

 

 

 

Wrong fuel type?

Flush fuel system, and replace

 

with correct type of fuel.

 

 

 

 

 

Difficult to start, "fuel is available, spark

Water or dust in fuel system?

Flush fuel system.

is present and compression is normal".

 

 

Air cleaner dirty?

Clean or replace air cleaner.

 

 

 

 

 

Choke Open?

Close Choke.

 

 

 

 

Suction/exhaust valve stuck or protruded?

Re-seat valves.

 

 

 

 

Piston ring and/or cylinder worn?

Replace piston rings and/or

 

piston.

Difficult to start, "fuel is available, spark

 

 

 

 

 

is present and compression is low".

Cylinder head and/or spark plug not

Torque cylinder head bolts and

 

tightened properly?

spark plug.

 

 

 

 

Head gasket and/or spark plug gasket

Replace head and/or spark plug

 

damaged?

gaskets.

 

 

 

 

Fuel not available in fuel tank (tank empy)?

Fill with correct type of fuel.

 

 

 

 

Fuel filter clogged?

Replace fuel filter.

No fuel present at the carburetor.

 

 

Fuel tank cap breather hole clogged?

Clean or replace fuel tank cap.

 

 

 

 

 

Air in fuel line?

Bleed fuel line.

 

 

 

HS81 CUT-OFF SAW — OPERATION & PARTS MANUAL — REV. #4 (09/12/05) — PAGE 27

Page 27
Image 27
Multiquip manual HS81 CUT-OFF SAW Troubleshooting Engine

HS81 specifications

The Multiquip HS81 is a high-performance, state-of-the-art concrete screed that has become a go-to equipment for contractors seeking efficiency and precision in surface finishing tasks. Designed with the professional contractor in mind, the HS81 excels in leveling and smoothing concrete surfaces, making it an essential tool for large scale construction projects.

One of the most notable features of the HS81 is its lightweight yet robust design. Weighing in at only 82 pounds, this screed can be easily handled by one person, allowing for efficient workflow without compromising strength and durability. Its aluminum frame is engineered to withstand harsh working conditions while ensuring longevity, reducing the need for frequent replacements or repairs.

The HS81 is equipped with a powerful 4-cycle engine, which delivers exceptional torque and performance. This engine is not only reliable but also fuel-efficient, enabling extended operation without the need for constant refueling. The screed features an adjustable handle that can be easily tailored to suit the operator's height, enhancing comfort during prolonged use.

In terms of technology, the HS81 incorporates advanced vibration control to produce a smooth and even finish. The screed’s unique vibration design minimizes the likelihood of concrete segregation, ensuring a consistent level of compaction throughout the surface. This innovative approach contributes to the screed's performance in achieving a professional-grade finish.

The HS81 also includes interchangeable strike-off blades, which can accommodate different types of concrete mixes and surface finishes. Whether a contractor is working with standard mixes or specialized formulas, the versatility of blade options allows them to achieve the desired results efficiently.

Another characteristic that sets the HS81 apart is its user-friendly design. The intuitive controls simplify operation, allowing even less experienced operators to achieve excellent results. Additionally, the maintenance requirements for the HS81 are minimal, meaning contractors can spend more time on the job site and less time troubleshooting equipment issues.

In summary, the Multiquip HS81 concrete screed stands out in the marketplace due to its lightweight design, powerful engine, advanced vibration control technology, and user-friendly features. It is a versatile, efficient, and reliable tool that helps contractors deliver outstanding results in concrete surface finishing, making it an invaluable asset to any construction crew.