There are a few variations on that. US/Canadian, Auto/Stick, Air/No Air, California. What you got?
from Mazda or you could try your local library they often have workshop books.
A person can find a wiring diagram for a 1984 Mazda b2000 in its maintenance book. They can also ask for a print out at an auto part store.
See the attached link below for a color coded diagram that should get you in the ball-park.
Attached is the vacuum diagram for the 91 B2200, it should be close enough to get you in the ball park. Kyrasis6 Owner of Mazdatruckin.com
mazda b2000
I have attached a link for the 91 B2200 vacuum diagram, it should be almost the same. Mazdatrucking.com is a great resource with lots of info on repairs.
The engine oil capacity for a 1986 Mazda B2000 is 4.1 quarts.
If the diagram decal is not under the hood, your best bet would be to visit your local library and find a reference specific to your vehicle. I don't think reference books are available for checkout, but you can make copies of the diagrams there.
I believe the carburetor is a Mikuni. I have a 1986 B2000 myself.
Yes, a Mazda B2000 is most definitely a 4-cylinder with a 2.0L engine. However, technically Mazda didn't produce the B2000 as a 1988 model. It was made in 1986-1987. Then in 1989 Mazda made the B2200 Pickup, which is a 2.2L 4 cylinder.
Yes, all B2000 models until 89 where carbureted. After 89 Mazda stopped production in the United States on this model.
One could purchase auto parts to repair a Mazda B2000 from the Mazda B2000 Auto Parts online catalog. Other places to purchase auto parts to repair a B2000 would include O'Reilly Auto, Advance Auto Parts and also Auto Parts Wearhouse.