Silverton 402 / 422 Motor Yacht
Built 1996–2001 by Silverton Marine
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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
- Water heater
- AC
- Generator
- fitted on some boats
- Stern thruster
- not fitted
- Steering
- hydraulic
Tank capacities — where the figures come from
-
Fuel 375 gal
“Fuel (gallons) 375” — broker listing (2000), yachtauctions.com · “370 gallons (two 185-gallon tanks with crossover)” — broker listing (2000), yachtauctions.comThe listing gives 375 gal in its header but two 185-gal tanks (370) in its details; no builder figure was found.
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Water 132 gal
“Water (gallons) 90” — broker listing (2000), yachtauctions.com · “Fresh Water: 40 gallons” — broker listing (2000), yachtauctions.comThe only listing checked contradicts itself (90 and 40 gal), and both are below our earlier 132. Worth confirming on your boat.
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Holding 58 gal
“Waste (gallons) 58” — broker listing (2000), yachtauctions.com · “Waste Water: 20 gallons” — broker listing (2000), yachtauctions.comThe listing's header agrees with 58 gal; its detail list says 20.
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Water heater AC
“Check with your Silverton dealer for the capacity of the water heater installed on your yacht. The water heater operates” — owner's manual (1986-1999 (all models)), silvertonclub.comOnly Silverton's general 1986-1999 owner's manual was found (it covers the 1996-99 boats but isn't model-specific): a 120 V heater, capacity left to the dealer. No listing we read gave a size.
Tanks are often replaced or added on older boats — check the tank labels or a survey for yours.
Thrusters and steering — where this comes from
-
Bow thruster unknown
The builder's general owner's manual (1986-99) and the Denison buyer's guide do not mention a thruster; no option list found.
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Stern thruster not fitted
Our earlier figure of none has no source; the Silverton general owner's manual (1986-99) never mentions a thruster.
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Steering hydraulic
“Your Silverton yacht has a modern, manual, hydraulic steering system. The system consists of the "head" pump at the helm” — owner's manual (1986-1999), silvertonclub.comSilverton's general owner's manual for 1986-99 models describes manual hydraulic steering; it covers the 402 (1996-98) and 422 through 1999, not 2000-01 boats. No maker named.
Thrusters and steering are often replaced — check the units on your boat before ordering parts.
Sources disagree on make of standard gas engines — left blank rather than guessed.
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.
Engines fitted
-
MerCruiser big-block gas V8 — gas, twin
standard
HMY says most were sold with big-block MerCruiser gas engines (14-16 knots cruise, about 20 top); model/hp not stated.Sources: hmy.com
-
Crusader 8.2L (502) gas V8, V-drive — gas, twin
factory option
Found on a 1999 and a 2000 Silverton 422 for sale (V-drives). One listing prints '503 HP each', which looks like a confusion with the 502 cid designation, so hp is left blank.Sources: harbortownemarine.com · yachtauctions.com
Boats of the same model can differ — check which engines yours actually has before ordering parts.
Generator
A Boat Trader listing for another 1996 402 also mentions a Kohler 4-cylinder generator. No builder document or review was found saying whether the generator was standard or optional.
-
Kohler — 8 kW
Seen on two separate boats (a 1996 402 and a 1999 422), both with gasoline Crusader 8.2 L engines; the generator's fuel isn't stated. Whether it was standard or an option isn't documented.“8KW Kohler Generator (500 hrs)” — search excerpt (1996), au.boats.com · “powered by twin Crusader 8.2 L engine with 609 hours and a Kohler 8 kW generator with 881 hours” — broker listing (1999), harbortownemarine.com
Generators are often replaced or added — check the unit's own plate before ordering parts.
Manuals and brochures online
- Owner's manual Silverton general owner's manual for models 1986-1999 (1986-1999) — silvertonclub.com
Hosted by the builder or an owners' association; they own the copyright.
Known problems for this model
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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)
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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
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Overheating from scaled manifolds cooling
Rust and scale inside the manifolds restrict cooling flow and cause overheating under load.powerandmotoryacht.com
Maker’s service schedule (8)
| Engine oil & filter change | 100 hrs or 1 yr | “Most four-stroke outboards and sterndrive engines require an oil change either annually or every 100 hours of operation.” — manufacturer, mercurymarine.com |
| Fuel filters & water separator | 100 hrs or 1 yr | “The fuel filter on your engine should be inspected or replaced per the maintenance schedule in your owner's manual, usua” — manufacturer, mercurymarine.com |
| Raw-water pump impeller | 300 hrs or 3 yrs | “How often should my seawater pump impeller be serviced? Every 300 hours or 3 years, whichever comes first.” — manufacturer, mercurymarine.com |
| Spark plugs inspect / replace | 300 hrs or 3 yrs | “How often should spark plugs be changed? Every 300 hours or 3 years, whichever comes first.” — manufacturer, mercurymarine.com |
| Coolant replacement & freeze-point test closed (freshwater) cooling only | 5 yrs | “How often should coolant be changed on engines with closed cooling? Every 5 years.” — manufacturer, mercurymarine.com |
| Transmission fluid change sterndrive gear lube | 1 yr | “Gearcase lubricant in outboard and sterndrive lower units should also be changed annually or at the service interval spe” — manufacturer, mercurymarine.com |
| Lubricate steering linkage and check power-steering fluid sterndrive | 100 hrs or 1 yr | “Mercury Marine recommends lubricating the steering linkage and checking the power steering fluid level in ... MerCruiser” — manufacturer, mercurymarine.com |
| Check power trim fluid level sterndrive | 100 hrs or 1 yr | “Power trim and tilt fluid level should be checked annually or every 100 hours.” — manufacturer, mercurymarine.com |
Service part numbers (6)
| Oil filter | Mercury Quicksilver 35-866340Q03 | “Part number: 866340Q03 ... for MerCruiser sterndrive and inboard engines except V6 engines with the oil filter mounted o” — manufacturer, mercurymarine.com · “Includes: Oil Filter Oil Filter 866340Q03 Fuel Filter 802893Q01 ...” — dealer, midnightmarine.net |
| Fuel filter carbureted engines (Rochester 2-/4-barrel, MerCarb 2-barrel): filter inside carburetor fuel inlet |
Mercury 53336T | “For use on MerCruiser 3.0L, 4.3L, 5.0L , 5.7L and 7.4L engines with Rochester 2- and 4-barrel and MerCarb” — manufacturer, mercurymarine.com |
| Fuel filter MPI engines with Gen III cool fuel module (filter page: 2004 and newer; kit page: 2002 and newer) |
Mercury Quicksilver 35-8M0093688 | “Fits 2004 and newer Mercury/MerCruiser sterndrive and inboard engines with Gen III (3) fuel cooler” — manufacturer, mercurymarine.com |
| Raw-water impeller Bravo sterndrive and inboard engines with engine-mounted sea water pump (2-piece plastic pump per Mercury) |
Mercury Quicksilver 47-59362Q01 Also: Sierra 18-3087 |
“For MerCruiser engines with engine mounted, 2-piece, plastic sea water pumps.” — manufacturer, mercurymarine.com · “Water Pump Impeller 59362Q01” — dealer, midnightmarine.net |
| Thermostat standard cooling, 160 F |
Mercury Quicksilver 807252Q5 | “Thermostat 807252Q5 is for V6 and V8 MerCruiser engines ... made by General Motors (model year 1987-2016)” — manufacturer, mercurymarine.com |
| 100-hour maintenance kit (oil filter, fuel filter, drive seals) MPI engines with Gen III cool fuel module (2002 and newer) |
Mercury 8M0147053 | “Mercury 8M0147053 MerCruiser 5.0L, 5.7L, 6.2L, 8.1L and 8.2L V8 MPI ... 100 Hour Maintenance Kit” — manufacturer, mercurymarine.com |
From the engine maker’s parts lists, or two independent parts dealers. Numbers change with serial number and get superseded — check yours before ordering.
Crusader 350 / 454 inboard gas V8 parts: good
Factory optional engine — you entered “Crusader 8.2L (502) gas V8, V-drive”
GM-based inboard engines; Crusader (now part of Pleasurecraft Marine Engine Co.) still publishes illustrated parts manuals and sells through distributors. Go2marine stocks Crusader manifolds, risers, raw water pumps and ignition parts; Osco and Barr make aftermarket manifolds, and new GM/Crusader base engines are sold by rebuilders.
Parts sources: Crusader Engines, Go2marine (Crusader parts), 1-800-RUNS-NEW (GM & Crusader base engines)
Common problems (1)
-
Clogged or failing manifolds/risers exhaust
Owners find individual risers running much hotter than the others (a sign of internal blockage) and debate replacing vs. flushing; Osco manifolds are often preferred as closest to OEM.marineengine.com · marineengine.com
Maker’s service schedule (14)
| Engine oil & filter change 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 50 hrs or 1 yr | “Change engine oil and filter — After 1st 25 Hrs / Every 50 Hours of Operation / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Fuel filters & water separator 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 50 hrs or 1 yr | “Fuel Filters - Service or replace — After 1st 25 Hrs / Every 50 Hours / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Raw-water pump impeller 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 100 hrs or 1 yr | “Cooling System - Inspect/Replace raw water pump impeller — Every 100 Hours of Operation / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Drive belts inspect / replace 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 100 hrs or 1 yr | “Drive Belt - Inspect condition and check tension — After 1st 25 Hrs / Every 100 Hours / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Spark plugs inspect / replace 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 100 hrs or 1 yr | “Ignition System and Spark Plugs - Clean and inspect condition — After 1st 25 Hrs / Every 100 Hours / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Exhaust mixing elbow inspection 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 100 hrs or 4 mo | “Exhaust System - Check condition and tightness of all hose clamps — After 1st 25 Hrs / Every 100 Hours(1) / Once Each Ye” — manufacturer (2013), crusaderengines.com |
| Coolant replacement & freeze-point test 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 5 yrs | “Fresh-water cooled models - Change coolant — Every five years” — manufacturer (2013), crusaderengines.com |
| Engine pencil zincs 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 1 mo | “Zinc Anodes - Heat exchanger and cooler - check condition — Every 30 days” — manufacturer (2013), crusaderengines.com |
| Transmission fluid change 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 1 yr | “Transmission and "V" Drive - Change fluid and clean strainer, if equipped — After 1st 25 Hrs (Hurth Only) / Once Each Ye” — manufacturer (2013), crusaderengines.com |
| Flame arrestor & crankcase ventilation - clean and inspect 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 100 hrs or 1 yr | “Flame Arrestor and Crankcase Ventilation System - Clean and inspect — Every 100 Hours / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Engine alignment check 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 1 yr | “Engine Alignment - Check and adjust if necessary — After 1st 25 Hrs / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Inspect all hoses (and cooling hose clamps) 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 100 hrs or 1 yr | “Hoses (all) - Inspect for cracks, swelling, weather checking or other signs of deterioration — Every 100 Hours / Once Ea” — manufacturer (2013), crusaderengines.com |
| Shift & throttle cable linkage - inspect and lubricate 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 100 hrs or 4 mo | “Shift and Throttle Cable Linkage - Inspect and lubricate — Every 100 Hours(1) / Once Each Year” — manufacturer (2013), crusaderengines.com |
| Electrical system - check connections and wiring 2013 MPI 5.0L/5.7L (350 CID)/6.0L | 50 hrs or 2 mo | “Electrical System (complete) - Check for loose or dirty connections and damaged wiring — Every 50 Hours(2) / Once Each Y” — manufacturer (2013), crusaderengines.com |
Service part numbers (18)
| Oil filter remote-mounted oil filter (MP7.4L and 2013 5.0/5.7/6.0L MPI) |
Crusader 22679 | “Oil Filter 22679 (MAINTENANCE ITEM PART NUMBERS)” — manufacturer, crusaderengines.com |
| Fuel filter MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008 |
Crusader 47038 | “Fuel Filter 47038 (MAINTENANCE ITEM PART NUMBERS)” — manufacturer, crusaderengines.com |
| Fuel filter 5.7L (350) MPI with FCC fuel system, 2007 on - 2013 owner manual L510001-13 |
Crusader RP080026 | “Fuel Control Cell (FCC) Fuel Filter Element RP080026” — manufacturer, crusaderengines.com |
| Fuel pre-filter / separator MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008: engine-mounted Racor water-separating filter 47046 |
Crusader 47047 | “25 47047 Element, Racor fuel filter (Not Shown) 1” — manufacturer, crusaderengines.com |
| Fuel pre-filter / separator 5.7L (350) MPI with FCC fuel system, 2007 on - 2013 owner manual L510001-13: primary fuel filter |
Crusader R080033 | “Primary Fuel Filter Element R080033” — manufacturer, crusaderengines.com |
| Raw-water impeller MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008 (raw water pump RA057031) |
Crusader RP061017 Replaces R061017 |
“Replaces Crusader R061017 (Impeller Kit with Gasket & O-Ring | Crusader RP061017)” — dealer, marinepartssource.com · “Replaces Crusader R061017 (Impeller Kit with Gasket & O-Ring | Crusader RP061017)” — dealer, marinesuppliesdepot.com |
| Raw-water impeller 5.7L (350) MPI with FCC fuel system, 2007 on - 2013 owner manual L510001-13 |
Crusader RP061022 | “Impeller , Raw Water Pump (1) RP061022 (ON-BOARD PARTS KIT 5.7L)” — manufacturer, crusaderengines.com |
| Raw-water pump kit MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008 (raw water pump RA057031) |
Crusader 40064 | “40064 Overhaul Kit, Major (includes items 2, 3, 11, 14 and 15)” — manufacturer, crusaderengines.com |
| Drive belt MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008: alternator drive |
Crusader 98210 | “Alternator Drive Belt 98210” — manufacturer, crusaderengines.com |
| Drive belt MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008: raw water pump drive |
Crusader 10258 | “Raw Water Pump Drive Belt 10258” — manufacturer, crusaderengines.com |
| Drive belt 5.7L (350) MPI with FCC fuel system, 2007 on - 2013 owner manual L510001-13, left-hand (LH) rotation: serpentine |
Crusader R066028 | “Belt , Serpentine (1) R066028 (ON-BOARD PARTS KIT 5.7L (LH))” — manufacturer, crusaderengines.com |
| Drive belt 5.7L (350) MPI with FCC fuel system, 2007 on - 2013 owner manual L510001-13, right-hand (RH) rotation: serpentine |
Crusader R066029A | “Belt , Serpentine (1) R066029A (ON-BOARD PARTS KIT 5.7L (RH))” — manufacturer, crusaderengines.com |
| Spark plug MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008: platinum plug |
Crusader 49078 × 8 | “Spark Plugs (platinum) 49078” — manufacturer, crusaderengines.com |
| Spark plug 5.7L (350) MPI with FCC fuel system, 2007 on - 2013 owner manual L510001-13: platinum plug set |
Crusader RP030010 | “Spark Plug , Set, (Platinum) (1) RP030010 (ON-BOARD PARTS KIT 5.7L)” — manufacturer, crusaderengines.com |
| Thermostat MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008: raw-water (standard) cooling, 143 F |
Crusader R026002E | “6 R026002E Thermostat (143-degree) 1 (Raw Water Cooling Components - Figure 18)” — manufacturer, crusaderengines.com |
| Thermostat MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008: fresh-water (closed) cooling kit, 170 F |
Crusader 98203 | “5 98203 Thermostat (170-degree) 1 (Fresh Water Cooling Components 1)” — manufacturer, crusaderengines.com |
| Zinc / anode MP7.4L / MP454 XLi (454 MPI) - illustrated parts manual L510008: oil cooler / transmission cooler / heat exchanger |
Crusader R168005 | “24 R168005 Zinc, sacrificial 1 (Raw Water Cooling Components - Figure 18)” — manufacturer, crusaderengines.com |
| On-board spare parts kit (belt, cap, rotor, fuses, relays, plugs, impeller, fuel filters) 5.7L (350) MPI with FCC fuel system, 2007 on - 2013 owner manual L510001-13, LH rotation |
Crusader RK173089D-07 | “ON-BOARD PARTS KIT 5.7L (LH) 2007 TO PRESENT, FCC FUEL SYSTEM RK173089D-07” — manufacturer, crusaderengines.com |
From the engine maker’s parts lists, or two independent parts dealers. Numbers change with serial number and get superseded — check yours before ordering.
Model sources (5)
hmy.com · harbortownemarine.com · yachtauctions.com · silvertonclub.com · harbortownemarine.com
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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.