Diesel Generator Won’t Start – Tried Everything

Diesel generator still won’t start? Then we need to look at the ‘not-so-obvious’ and check them carefully, one by one.

Firstly check through all the advice that Power Continuity has provided within our FREE knowledge resource base listed below:-


Now let’s check through the ‘ not-so-obvious’ issues

Exhaust outlet – is the rain flap rusted in place and won’t rise?

Always lubricate the exhaust flap regularly to ensure it has free movement. The generator will struggle to start and won’t start

Exhaust outlet – is the exhaust rusted OPEN and been allowing rain into the exhaust.

If it is full of rain water internally, then your generator will not start.

Big Problem – You’ll first need to ensure the water has been removed before re-starting your generator. Then lubricate the exhaust flap regularly to ensure it has free movement

Silencer – Has the silencer got holes and not been maintained?

It can be also full of water or even the home to birds, blocking the air flow to smoother the generator not allowed it to start. Check for holes. Then use a flexi camera to check inside. If you find water or home to birds etc. then better to replace the silencer than fix it.

Fuel – Generator has stood for many years and never been used?

Then your fuel can be like treacle & unusable.

Flush out the fuel, clean the fuel lines and replace with NEW clean diesel from a reputable supplier.

Fuel hoses can have perished and stuck together preventing fuel flow.

Metal fuel pipes can be bent or nipped to stop fuel flow- check all metal pipes for hidden damage. Replace ALL Filters with Brand NEW Branded Filters.

Never use pre-used or ‘Copy, look alike’ filters. These are cheap for a reason

BUND Alarm

If you have fluids within the bund, the bund alarm won’t allow the generator to start in the first place or it runs a little then will shut the generator down.

Check that there are NO fluids around the generator floor or leaks within the bunded generator

Also check the associated Bunded fuel tank that feeds the generator with fuel

In either case a bund with fluids will NEVER allow the generator to start.

Solution- clean the fluids out of the bunded area in the generator and also clean up the bund of the fuel tank. Once cleaned then re-start the generator

Container Generators – With Motorised louvres

Won’t Start? Check the louvres rusted closed & can’t open.

If the louvres can’t open then the generator can’t vent, hence won’t start. Firstly lubricate all the moving parts of the louvres. Then check also that the electric motor that powers the louvres is operational.

Test the louvres can now open free and easily. Now re-start the generator.

Finally check all hose connections – See Photo below

After all of the above your generator should be ready to Start. If you still have an issue then time it’s to call the local dealer – You’ve done your best.

For further assistance, contact Power Continuity 0845 055 8455

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