I would say roughly 5 hours. you need to remove a lot of things, and drain the coolant too. all these processes involve running into issues that slow down the whole thing, so what really should be a 2 hour job takes longer.
Timing Belt
The 1.8 litre four cylinder engine in a 1995 Mazda Miata has a timing BELT
Here you can find the whole instructions how to change your timing belt on a Miata http://www.racecaddy.com/mx5/tech/timing-belt-mx5.html it has good images and it is well explained good luck
The timing belt has been replaced with a no-maintenance chain on 2006 & up
The Mazda Miata transitioned from a timing belt to a timing chain with the introduction of the ND generation in 2015. This change was part of the car's overall redesign, which included various updates to its engine and performance features. Prior to this, earlier generations of the Miata, specifically the NA, NB, and NC models, utilized timing belts.
The standard for most vehicles is every 60-70k miles.
The 2013 Mazda Miata is equipped with a timing chain, not a timing belt. Timing chains are generally more durable and require less frequent replacement compared to timing belts. This means that the timing chain in the Miata is designed to last the life of the engine under normal driving conditions.
The timing belt has been replaced with a no-maintenance chain on 2006 & up
The 2006 Mazda Miata is equipped with a timing chain, not a timing belt. Timing chains are generally more durable and do not require regular replacement like timing belts. This design helps reduce maintenance costs over the vehicle's lifespan.
timing BELT ( according to Gates , they make timing belts etc. - it is also an interference engine )
YES! It should be change every 60,000 miles and here is how to replace it: http://www.racecaddy.com/mx5/tech/timing-belt-mx5.html Good luck
There is no fan belt on a Mazda Miata.