Technical Service Bulletin Starter Motor/Gear Damage

Subject: Starter Motor/Gear Damage              Models: 911 Carrera

Bulletin Number: 87 – 08

To assure good starter engagement, the engine mounting flange/starter motor mounting flange dimension on the 1987 Model 911 Carrera transmission housing was reduced from 117 – 0.2mm to 115 – 0.2mm (see picture)

From Production Date: September 6, 1986

Transmission number: 74H00889

When replacing starter motors with gear damage, the starter ring gear should also be checked for damage and replaced if necessary. Transmission and replaced if necessary. Transmission dimension “a” should also be checked.

If transmission housing measurement “a” is 117 – 0.2mm, starter mounting flange should be machined to dimension 115 – 0.2mm. This machining can be accomplished without disassembling the transmission.

motor/gear damage image transmission

Important Notice: Technical Bulletins are intended for use by professional technicians, not a “Do-it-yourselfer”. They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Special tools may be required to perform certain operations identified in these bulletins. Use of tools and procedures other than those recommended in these bulletins may be detrimental to the safe operation of your vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle or that your vehicle will have that condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your Porsche Dealer for information on whether your vehicle may benefit from the information. Part numbers listed in these bulletins are for reference only. Always check with your authorized Porsche dealer to verify correct part numbers.

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