I'm with briggs we need to know the model. Some you can just remove the screws and replace the bulb and others are connected with fuel lines.
#4
Mid TN Lawn
We buy bulbs on ebay the plug in type are around 7.00 for ten and the bulb type are 5.50 for ten. The type with screws just remove screws and swap bulb. Insert type with lines attached just pluck out with needlenose hold fuel lines and replace lines on insert bulb with fingers. Either type take less than 5 minutes.