Silverton 402 / 422 Motor Yacht
Built 1996–2001 by Silverton Marine
About the Silverton 402 / 422 Motor Yacht
Researched from public sources for this model. Any individual boat may have been modified or repowered — confirm before relying on any figure.
- Built
- 1996–2001
- Builder
- Silverton Marine
- Length
- 45.92 ft
- Beam
- 14.17 ft
- Draft
- 3.5 ft
- Displacement
- 23,826 lb
- Hull / keel
- planing
- Propulsion
- inboard
- Fuel
- 375 gal
- Water
- 132 gal
- Holding
- 58 gal
- Stern thruster
- none
Called 422 Motor Yacht 1999-2001. Entry-level aft-cabin with two staterooms/two heads; hardtop and wing doors standard. Most had big-block MerCruiser gas engines (14-16 kt cruise). LOA 45.9 ft per HMY likely includes platform and pulpit.
Known problems for this model
-
Tight engine room engine
Engine room, reached through salon hatches, is a tight fit.hmy.com
Engines & parts
MerCruiser 5.0 (305) / 5.7 (350) V8 gas parts: good
Factory standard engine — you entered “MerCruiser big-block gas V8”
GM small-block Chevrolet base engines, so internal parts are everywhere. Marine exhaust manifolds and risers for 1983–2002 small blocks are sold by many aftermarket makers (Sierra, Barr, Osco and others) through Power Boat Supply, Hardin Marine, Basic Power Industries and similar stores; Mercury sells genuine parts through dealers.
Parts sources: Power Boat Supply, Hardin Marine, Basic Power Industries
Common problems (2)
-
Manifold/riser failure and water in cylinders exhaust
Cast-iron manifolds and risers rust internally or their gaskets fail, letting water back into the cylinders; small amounts cause hard starting and rough running, large amounts hydrolock and wreck the engine. Service roughly every 7 years in fresh water and about 5 in salt.powerandmotoryacht.com · forums.iboats.com · justanswer.com
-
Overheating from scaled manifolds cooling
Rust and scale inside the manifolds restrict cooling flow and cause overheating under load.powerandmotoryacht.com
Model sources (1)
Other Silverton models
- Silverton 34 Convertible (1991-95) 1991–1995
- Silverton 37 Convertible (1980-89) 1980–1989
Researched from public sources. Spotted an error? The sources are listed above — tell us what they got wrong.