The service and repair manual for the 1986 Mercury Grand Marquis — 5.0L V8 and 5.8L V8 engines, 5 trims. Matched to this exact model year, so the specifications and sequences are the ones Mercury published for your car, not figures carried over from a neighbouring year.
01 / FitmentWhat this manual covers
| Model year | 1986 |
|---|---|
| Engines | 5.0L V8 — OHV 5.8L V8 — 351 cu in, OHV |
| Trims | Base Sedan 2-Door · Base Sedan 4-Door · Colony Park Wagon 4-Door · LS Sedan 2-Door · LS Sedan 4-Door |
| Federal record | 1 recall · 22 complaints · 22 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 1986 Grand Marquis manual
03 / ContentsSections in the manual
- Quick Lookups 66
- Engine Performance 710
- Accessories & Equipment 236
- General Information 1,456
- Body & Frame 53
- Heating, Ventilation & A/C (HVAC) 236
- Brakes 54
- Maintenance 134
- Drivelines & Axles 46
- Steering 122
- Electrical 245
- Suspension 92
- Engine Mechanical 143
- Transmission 165
04 / Known issuesRecalls on federal record for the 1986 Grand Marquis
- Fuel System, Gasoline — delivery › hoses, lines/piping, and fittings · 87V139000Coupling could disengage due to fuel pressure,vibration, and engine movements; this would cause loss.
Owners have filed 22 complaints and Mercury has issued 22 technical service bulletins for the 1986 Grand Marquis. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 1986 Grand Marquis manual
Is this manual specific to the 1986 Grand Marquis?
Yes. It is the OEM manual matched to the 1986 model year, covering the 5.0L V8 and 5.8L V8 across the Base Sedan 2-Door, Base Sedan 4-Door, Colony Park Wagon 4-Door, LS Sedan 2-Door, LS Sedan 4-Door trims. Specifications and procedure sequences are the ones Mercury published for this year.
What 1986 Grand Marquis problems does it help with?
1 recall is on federal record for the 1986 Grand Marquis, covering fuel system, gasoline. The manual carries the manufacturer's diagnostic and repair procedures for those systems; the recall repairs themselves are done free by Mercury dealers.
Does it include 1986 Grand Marquis wiring diagrams?
Yes — the complete wiring diagrams for the 1986 build, alongside repair procedures, specifications and diagnostics.
Is it a subscription?
No. $29.99 once and the manual is yours. It is a digital manual — nothing ships; access details arrive by email after checkout and it works on any device.
RelatedOther Grand Marquis years and 1986 Mercury models
1992 Grand Marquis · 1991 Grand Marquis · 1990 Grand Marquis · 1989 Grand Marquis · 1988 Grand Marquis · 1987 Grand Marquis · 1985 Grand Marquis · 1984 Grand Marquis · 1983 Grand Marquis · 1982 Grand Marquis · all 30 years
1986 Mercury Capri · 1986 Mercury Cougar · 1986 Mercury Lynx · 1986 Mercury Marquis · 1986 Mercury Sable · 1986 Mercury Topaz · every 1986 model