troubleshooting

 

 

 

 

 

 

 

Troubleshooting (engine)

 

Symptom

possible problem

Solution

 

 

 

 

Spark plug bridging?

Check gap, insulation or replace spark plug.

 

 

 

 

Carbon deposit on spark plug?

Clean or replace spark plug.

 

 

 

 

Short circuit due to defi cient spark plug

Check spark plug insulation, replace if worn.

 

insulation?

 

 

 

Improper spark plug gap?

Set to proper gap.

 

Fuel reaching carburetor?

Check fuel line.

 

Water in fuel tank?

Flush or replace fuel tank.

 

Fuel fi lter clogged?

Replace fuel fi lter.

Diffi cult to start, fuel is available, but no spark

Stuck carburetor?

Check fl oat mechanism.

Spark plug is red?

Check transistor ignition unit.

at spark plug.

 

 

If insuffi cient compression, repair or replace

 

Spark plug is bluish white?

engine. If injected air leaking, correct leak. If

 

 

carburetor jets clogged, clean carburetor.

 

 

 

 

 

Check transistor ignition unit is broken, and

 

No spark present at tip of spark plug?

replace defective unit. Check if voltage cord

 

cracked or broken and replace. Check if

 

 

 

 

spark plug if fouled and replace.

 

 

 

 

No oil?

Add oil as required.

 

 

 

 

Oil pressure alarm lamp blinks upon starting?

Check automatic shutdown circuit, "oil

 

(if applicable)

sensor". (if applicable)

 

ON/OFF switch is shorted?

Check switch wiring, replace switch.

Diffi cult to start, fuel is available, and spark is

Ignition coil defective?

Replace ignition coil.

Improper spark gap, points dirty?

Set correct spark gap and clean points.

present at the spark plug.

Condenser insulation worn or short circuiting?

Replace condenser.

 

 

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.

 

 

Diffi cult to start, fuel is available, spark is

 

 

Water or dust in fuel system?

Flush fuel system.

present and compression is normal.

 

 

Air cleaner dirty?

Clean or replace air cleaner.

 

 

 

 

 

Choke open?

Close choke.

 

 

 

 

Suction/exhaust valve stuck or protruded?

Reseat valves.

 

 

 

Diffi cult to start, fuel is available, spark is

Piston ring and/or cylinder worn?

Replace piston rings and/or piston.

 

 

Cylinder head and/or spark plug not tightened

 

present and compression is low.

Torque cylinder head bolts and spark plug.

 

properly?

 

 

Head gasket and/or spark plug gasket damaged?

Replace head and spark plug gaskets.

 

 

 

 

No fuel in fuel tank?

Fill with correct type of fuel.

 

 

 

 

Fuel cock does not open properly?

Apply lubricant to loosen fuel cock lever,

 

replace if necessary.

No fuel present at carburetor.

 

 

 

Fuel fi lter/lines clogged?

Replace fuel fi lter.

 

 

 

 

 

Fuel tank cap breather hole clogged?

Clean or replace fuel tank cap.

 

 

 

 

Air in fuel line?

Bleed fuel line.

 

 

 

page 32 — WM70SH5C/wm70sh8c Mixer • operation and parts manual — rev. #0 (06/07/11)

Page 32
Image 32
Multiquip WM70SH5C, WM70SH8C manual Troubleshooting engine

WM70SH8C, WM70SH5C specifications

The Multiquip WM70SH5C and WM70SH8C are cutting-edge water pump models designed for construction and industrial applications. These robust machines are specifically engineered to handle a variety of heavy-duty pumping tasks, making them an essential asset for contractors and industrial operators alike.

The WM70SH5C model is powered by a reliable 5.5 HP Honda engine, while the WM70SH8C variant features an 8 HP Honda engine, providing additional power for demanding applications. Both models are equipped with a high-performance centrifugal pump, ensuring efficient water transfer and quick operation. They are capable of moving large volumes of water, making them suitable for dewatering, irrigation, and other water management tasks.

One of the standout features of the WM70SH series is their impressive maximum flow rate. The pumps can deliver up to 2,000 gallons per minute, significantly reducing the time required for water removal in flooded areas or construction sites. This efficiency is crucial in maintaining project timelines and ensuring safety in work environments.

Durability is another key characteristic of these models. The WM70SH5C and WM70SH8C are built with heavy-duty materials, including a cast iron pump housing and aluminum alloy components, which resist corrosion and ensure a long operational lifespan. Additionally, their rugged construction allows them to withstand harsh working conditions, making them reliable even in the toughest environments.

Ease of use and maintenance is also a priority in the design of these pumps. The WM70SH series features an easy-access maintenance panel that simplifies routine checks and service procedures. The equipped oil alert system helps prevent engine damage by shutting down the engine if the oil level is too low, providing peace of mind for operators.

Both models are designed for portability, with integrated handles and a lightweight frame that facilitate easy transportation. This mobility makes the WM70SH series ideal for contractors who need to move equipment frequently from one job site to another.

In summary, the Multiquip WM70SH5C and WM70SH8C water pumps stand out in the market for their powerful performance, robust construction, and ease of use. They are designed to deliver efficiency, reliability, and durability, making them an excellent choice for any water pumping requirements in construction and industrial applications. With features catering to the demands of heavy-duty tasks, these pumps enhance productivity while ensuring operational safety.