Description
Quicksilver 863007A1 Starter Motor Assembly delivers the dependable starting power your marine engine needs. This genuine Quicksilver component is built for GM-based MerCruiser V6 and V8 engines from 1983–2016, as well as select MCM 3.0L sterndrives from 1999–2015. Designed for bottom-mount installations, it features an offset bolt pattern and 11-tooth pinion for precise, consistent engagement every time.
Built for Marine Performance
- Direct OEM Replacement: Same model originally equipped on many GM-based MerCruiser engines for a seamless fit and installation.
- Durable Marine Construction: Manufactured to Mercury Marine OEM standards and engineered to withstand the moisture, vibration, and temperature extremes of marine operation.
- Reliable Starts: Provides strong, consistent cranking power to support smooth engine ignition even in harsh marine environments.
- Precision Fit: Designed specifically for bottom-mount configurations with an offset bolt pattern and an 11-tooth pinion gear.
- Supersession Information: Replaces part numbers 807904A1, 863007R01, 864340A2, and 864340R02.
Applications
- GM-based MerCruiser V6 and V8 engines (1983–2016)
- MerCruiser MCM 3.0L sterndrives (1999–2015)
Specifications
- Part Number: 863007A1
- UPC: 745061452572
- Mount Type: Bottom Mount
- Pinion: 11-Tooth
- Weight: 8.57 lb
- Dimensions: 12″ L × 6.5″ H
- Brand: Quicksilver
- Category: Parts › Starter Motors
Installation Notes
Refer to your Mercury Marine or MerCruiser service manual for proper starter removal and installation. Verify electrical connections, inspect the ring gear for wear, and confirm correct torque specifications. Always ensure battery voltage and grounding are within manufacturer requirements before starting the engine.
California Prop 65 Warning
WARNING: Cancer and Reproductive Harm
Depend on Quicksilver for genuine marine performance. The 863007A1 starter motor assembly is built to deliver lasting reliability and OEM-level starting power for your MerCruiser engine.



