Engine won't start
Tell a starter motor that won't crank apart from an engine that cranks but won't fire. Check the controls, battery and fuel before calling in a workshop.
Manuals
Check step by step
Select your engine on its model page to see the relevant steps and part numbers.
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Does the starter turn the engine over? Check neutral, the kill switch and the main battery switch.
Volvo Penta's starting table distinguishes a starter motor that doesn't turn from fuel and ignition faults.
Action: Reset the controls and emergency stop as described in your manual. On diesels with a mechanical stop control, make sure the control is reset.
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Check battery charge and visible cable connections.
A flat battery or poor connections can stop the starter motor from turning, or make it turn slowly.
Action: Switch off the power before cleaning or tightening connections. Charge the battery as instructed; do not bypass the engine or ground relays.
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Check the fuel level and any fuel valves.
The starter motor can crank normally even if there is no fuel.
Action: Fill with the correct fuel and open the valves as described in the manual. Check for visible leaks before trying to start again.
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Check the pre-filter/water separator and fuel filter.
Water, dirt and a clogged filter are covered in the manufacturers' troubleshooting guides.
Action: Service the filters as instructed for your model and catch any spills. On diesels, bleed the low-pressure system after opening it, following the correct manual.
fuel filterpre-filter - Workshop
On diesels: check the stop control, air filter and any glow plug preheating.
The D1/D2 table lists a pulled-out stop control, too little preheating and a blocked air filter. Not all diesels have glow plugs.
Action: Use the cold-start procedure for your model and replace a clogged air filter as described in the manual. Have a workshop check a suspected glow plug system rather than assuming the TAMD40 and MD2010 use the same system.
glow plug - Workshop
On a petrol engine: have the spark plugs and ignition system checked if there is fuel.
Sooty or damaged spark plugs, misfires and low voltage can prevent starting.
Action: Check according to the correct model manual, not by doing a spark test in an engine compartment full of fuel.
spark plug - Workshop
If the starter motor doesn't turn: check the specified fuses; leave relays and the starter motor to a workshop.
The starting circuit may have a faulty fuse, relay, cable or starter motor.
Action: Only use the specified fuse and never bypass protection. If the fuse blows again or the engine turns stiffly: stop trying to start it.
When to call a workshop
Call a workshop if the basic checks don't help, if fuses keep blowing or if fuel is leaking. If you hear a metallic clunk or the engine turns unusually stiffly, don't try to start it again. Let the workshop determine whether it's a starting fault or a mechanical fault.
Frequently asked questions
My TAMD40 won't start despite changing the filter and bleeding the system. Should I replace the glow plugs or the pump?
Don't guess. First check the fuel supply, the stop function and the cold-start equipment the model actually has. The D1/D2 table is no evidence that a TAMD40 has the same glow system; let the workshop continue before replacing expensive parts.
Can I bypass the ground relay and ground the starter motor directly?
The starting table is a reason to check the battery, cables, fuses and relays – not to modify the engine's grounding system. Have a workshop test the starting circuit without rebuilding or bypassing any protection.