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the starter has a starting system drive gear that should engage the flywheel when the key is in the start position and disengage when the engine starts rotating at a prescribed RPM. The sound may be the drive gear staying engaged with the flywheel. A way to check this is BEFORE starting the car, put it in 1st gear and rock the car. If you hear a clunk, then the starting gear has just disengaged from the flywheel. As mentioned by Briank, it could be due to a flywheel with damaged and/or missing teeth. Also it could be that your starter drive gear is damaged and/or needs some lubrication. See page 23-79 in the attached service manual for a starter system check and other related info in near by pages.Good luck...Bobhttp://www.nsxprime.com/FAQ/Reference/1991_svcman/1991_svcman.htm
the starter has a starting system drive gear that should engage the flywheel when the key is in the start position and disengage when the engine starts rotating at a prescribed RPM. The sound may be the drive gear staying engaged with the flywheel. A way to check this is BEFORE starting the car, put it in 1st gear and rock the car. If you hear a clunk, then the starting gear has just disengaged from the flywheel. As mentioned by Briank, it could be due to a flywheel with damaged and/or missing teeth. Also it could be that your starter drive gear is damaged and/or needs some lubrication. See page 23-79 in the attached service manual for a starter system check and other related info in near by pages.
Good luck...Bob
http://www.nsxprime.com/FAQ/Reference/1991_svcman/1991_svcman.htm
