You will need to remove the short section of exhaust pipe just down stream from the "Y" piece. The starter can then be removed fairly easily. You will need to replace the exhaust gaskets, the gasket on the downstream side is kinda hard to find. Before you try to remove the exhaust flange bolts spray them with a lot of WD-40 and let sit for awhile. You DO NOT want to break those bolts! Also, be sure to disconnect the battery!
The starter on a 94 Isuzu Trooper is located on the bottom, passenger side of the vehicle. It is found at the rear of the engine, at the flywheel.
It is located on the flywheel.
bypass key on a trooper
The starter for the 1992 Isuzu Trooper was a little difficult to locate, honestly. One may find it on the driver's side of the motor, directly above the oil pan.
under the hood in the fuse box
Starter Relay Isuzu Trooper (Diesel Engine) located in fuse box (engine room), grey color. They have 4 relay (Power Windows-black, AC-black, Engine/Alternator-blue, and Starter-diesel engine-grey)
Isuzu Trooper was created in 1981.
From what I understand, you have to diconnect the exhaust system on the side that the starter motor is located on. To reassemble you have to replace the exhaust gasket with a new one. If you are replacing the starter, there is a GM starter that is a direct replacement for the Isuzu starter and costs quite a bit less.
1999 Isuzu trooper
I found that the easiest way to get to the starter of an 1987 Trooper II is to take the front right wheel off. You should see it right there, and with relatively easy access.
Take out the transmission and there it is. The flywheel holds the ring gear for the starter. If your ring gear has been obliterated by your starter you have an issue with how the starter engages the fly wheel to begin with. Proper clearances, alignment and securing of your starter will make your trooper whole agian.
timing marks for 1996 Isuzu trooper