On a 85 prelude manual 5 speed there is a small square opening (approx 1 1/2" X 2') on the transmission housing where it mounts to the engine block just below and to the left (when facing front of car) of the number 4 spark plug. Look inside this opening and you will see the flywheel, the 20 degree BTDC mark is on the flywheel. There is a small needle shaped pointer on the engine block. Adjust the distributor so the timing mark on flywheel is in line with needle pointer. Since you asked where the marks are I assume you know how to time the engine. I.E. warm engine, plug vacuum hose at distributor, loosen and rotate distributor for your advance/retard.
The timing mark on flywheel may be dirty, I had to remove the flywheel cover under my engine by oil pan and hand crank engine counter clockwise with socket on the front of the crank inside fan belt pully to clean my flywheel. If fan belt pully bolt becomes loose, torque to spec and don't forget to remove socket from bolt when done cleaning and before you start engine....
The fuses on an 85 Honda Prelude are located in the panel near the hood release and under the hood. The main fuse box is located against the firewall in the engine compartment.
if you look behind the water pump straight down u can see the timing marks.
85 Lude, old school cable clutch... No hydraulics (fluid)
the timing marks are on the rear of the engine @ the top of the transmission bell housing,use the mark on the flywheel & pointer on the bell housing to line up the timing marks.
preludepower.com take visit there you will be among friends
Unscrew the bolts that connect the fans 2 the radiator then unplug the plugs and it should come out..
Overall Length SI 172.2 inches. Dx 169.1 inches Overall Width Both 66.9 inches
The sticker on the top right of the underside of the hood should have a picture of factory spec timing mark.
Passing Marks out of 85 is 34. techwithzm
With a timing light of course. Your crank pully should have 2 marks on it, the first mark is for the leading plugs and is 5 degrees AFTER top dead center (atdc) and the second mark is for trailing and is 20 degrees AFTER top dead center (atdc). Your 85 should have vacuum advance on your distributer, be sure to unplug the vacuum line and cap it off while stetting your timing. Trust me when I say, use only your timing marks, playing with your timing on rotaries causes all sorts of problems
Loosen the timing belt tensioner so the belt will have some slack before removing it from a 1985 Honda Civic. Remove the old belt. Install the new belt and make sure the engine is TDC.
1970's to 1980's had a Magnetic Probe receiver. Digital readout vs. using a Strobe inductive type. I own an 85' Chrysler 5th Ave 5.2L and I can't find actual timing marks so Magnetic Probe in my case is an alternative.