MC-42S CONCRETE MIXER — TROUBLESHOOTING (ENGINE)

Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a breakdown, please take a remedial action following the

diagnosis based on the Troubleshooting (Tables 9 and 10) information shown below and on the next page. If the problem cannot be remedied, please leave the unit just as it is and consult our company's business office or service plant.

TABLE 9. ENGINE TROUBLESHOOTING

SYMPTOM

POSSIBLE PROBLEM

SOLUTION

 

 

 

Difficult to start

 

 

 

 

 

 

Ignition plug being bridge?

Check ignition system.

 

 

 

Fuel is available but spark plug

Carbon deposit at ignition?

Clean or replace ignition.

 

 

will not ignite. (Power available at

Short circuit due to defective

Replace insulators.

high tension cable).

insulators?

 

 

 

 

 

 

 

Improper spark gap?

Set spark plug gap to the correct gap.

 

 

 

Fuel is available but spark plug

Short circuit at stop switch?

Check stop switch circuit. Replace stop switch if defective.

will not ignite. (Power NOT

 

 

 

 

available at high tension cable).

Ignition coil defective?

Replace ignition coil.

 

 

 

 

Muffler clogged with carbon

Clean or replace muffler.

 

deposits?

 

Fuel is available and spark plug

 

 

Fuel in use inadequate (water,

Flush fuel sytem and replace with fresh fuel.

ignites (compression normal).

dust)?

 

 

 

 

 

 

 

Air Cleaner clogged?

Clean or replace air cleaner.

 

 

 

 

Defective cylinder head gasket?

Tighten cylinder head bolts or replace head gasket.

Fuel is available and spark plug

 

 

Cylinder worn?

Replace cylinder.

ignites (compression low ).

 

 

 

Spark plug loose?

Tighen spark plug.

 

 

 

Operation not satisfactory

 

 

 

 

 

 

Air cleaner clogged?

 

 

 

 

Not enough power available

Air in fuel line?

Bleed (remove air) from fuel line.

 

 

(compression normal, no miss-

Fuel level in carbureator float

 

firing).

Adjust carbureator float

chamber improper?

 

 

 

 

 

 

Carbon deposits in cylinder?

Clean or replace cylinder

 

 

 

 

Ignition coil defective?

Flush fuel sytem and replace with fresh fuel.

Not enough power available

 

 

Ignition plug often shorts?

Replace ignition wires, clean ignition.

(compression normal, miss-

 

 

firing).

Fuel in use inadequate (water,

Flush fuel sytem and replace with fresh fuel.

 

 

dust)?

 

 

 

 

 

Excessive carbon depostion in

Clean or replace crankcase.

 

combustion chamber?

 

 

 

 

Engine overheats.

Exhaust or muffler clogged with

Clean or replace muffler.

 

carbon.

 

 

 

 

 

Spark plug heat value incorrect?

Replace spark plug with correct type spark plug.

 

 

 

PAGE 30 — MC-42S CONCRETE MIXERS — PARTS & OPERATION MANUAL — REV. #8 (12/16/05)

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Multiquip manual MC-42S Concrete Mixer Troubleshooting Engine, Engine Troubleshooting
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MC-42S specifications

The Multiquip MC-42S is a powerful and versatile concrete saw designed for both professional contractors and construction enthusiasts. This robust machine embodies a perfect blend of performance, durability, and ease of use, making it an excellent choice for a wide range of cutting applications, including asphalt, concrete, and masonry.

One of the standout features of the MC-42S is its dependable engine. Powered by a Honda GX390 gasoline engine, this saw delivers a peak performance of 13 horsepower, ensuring efficient cutting through tough materials. The engine is not only robust but also designed for fuel efficiency, which is essential for long working hours on the job site.

The MC-42S features an adjustable height handle that allows operators to easily control the cutting depth. This ergonomic handle enhances user comfort while reducing fatigue during prolonged use. The saw is equipped with an innovative bellows-style dust cover that minimizes dust production during cutting, keeping the job site cleaner and safer for everyone.

Another significant characteristic of the MC-42S is its cutting depth capability. With a maximum cutting depth of 14 inches, it’s suitable for a variety of cutting tasks, from shallow cuts to deeper trenches. This versatility allows users to tackle different projects without the need for multiple tools.

The saw features a heavy-duty frame constructed from high-strength materials, which enhances its durability and stability even during the most demanding tasks. Additionally, it comes equipped with large, robust wheels for easy mobility across job sites. This transportability ensures that operators can easily move the saw from one location to another without hassle.

Multiquip has integrated advanced technologies into the MC-42S, including a built-in water supply system that helps to cool the blade during operation. This system not only prolongs the life of the blade but also helps in minimizing the release of concrete dust, making it an environmentally friendly choice.

Finally, the MC-42S is designed for easy maintenance, with accessible components that make servicing straightforward. This feature ensures that the saw remains operational and reliable, minimizing downtime on the job.

In conclusion, the Multiquip MC-42S stands out as a premier option for those in need of a reliable and effective concrete saw. Its powerful engine, user-friendly design, efficient dust control system, and high cutting depth capabilities make it a favored choice across various construction and masonry applications.
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