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Catalina 27

Built 1970–1991 by Catalina Yachts

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About the Catalina 27

Researched from public sources for this model. Any individual boat may have been modified or repowered — confirm before relying on any figure.

Catalina 27
Photo: Ahunt, CC0 via Wikimedia Commons · licence (names blurred)
Built
1970–1991
Builder
Catalina Yachts
Designer
Frank Butler / Bob Finch
Length
26.83 ft
Waterline
21.75 ft
Beam
8.83 ft
Draft
4 ft
Displacement
6,850 lb
Ballast
2,700 lb
Hull / keel
fin keel
Rig
sloop
Propulsion
inboard
Fuel
varies by year
Water
18 gal
Holding
21 gal
Water heater
AC + engine · factory option
Number built
6,662
Stern thruster
not fitted
Steering
tiller
Tank capacities — where the figures come from
  • Fuel varies by year
    “FUEL CAPACITY 20 GAL” — owner's manual (1988 manual (boats built at publication)), catalina27.net · “Fuel Tank 15 Gallon C-27 w/ Atomic 4 or Diesel Engine” — search excerpt, catalinadirect.com · “Fuel Tank 19 Gallon W/Inspection Port C-27, C-28, C-320” — search excerpt (later diesel boats (not stated)), catalinadirect.com
    The builder's 1988 owner's manual gives 20 gal but says it applies to boats built then, not earlier hulls. Catalina Direct, an independent parts supplier, sells a 15-gal replacement for Atomic 4/diesel boats and a 19-gal tank shared with the C-28/C-320. Many early C27s had outboards and portable tanks. No single figure covers 1971-1991.
  • Water 18 gal
    “FRESH WATER, CAPACITY 18 GAL” — owner's manual (1988 manual), catalina27.net · “18 gallon water tank” — broker listing (1987), sailingtexas.com · “20-gallon fresh water tank” — search excerpt (1981), youtube.com
    The builder's 1988 owner's manual gives 18 gal and a 1987 listing agrees. A 1981 listing says 20 gal, so early boats may differ.
  • Holding 21 gal
    “WASTE TANK, CAPACITY 21 GAL” — owner's manual (1988 manual), catalina27.net · “22 gallon holding tank” — broker listing (1987), sailingtexas.com
    The builder's 1988 owner's manual gives a 21-gal waste tank; a 1987 listing says 22.
  • Water heater AC + engine · factory option
    “STANDARD WATER SYSTEM (galley foot pump, no heater); HOT AND COLD PRESSURE WATER SYSTEM: water heater, plumb to optional” — owner's manual (1988), catalina27.net · “The optional 110 volt AC system ... breaker schedule: Water heater B 20” — owner's manual (1988), catalina27.net
    In the 1988 factory owner's manual the standard water system is a galley foot pump with no heater, while a separate hot and cold pressure water drawing (4.3.5) shows a heater plumbed to the optional inboard engine, with its own 20 A breaker on the optional 110 V shore power. That split is why it is shown as optional; no capacity or brand is given.

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
    Builder brochure and 1978/1988 owner's manuals say nothing about a thruster.
  • Stern thruster not fitted
    Our earlier figure of none has no source, and nothing was found either way.
  • Steering tiller
    “Tiller steering was standard, although I have seen some early boats retrofitted with a pedestal and wheel. Late in the p” — review, sailingmagazine.net · “REMOVE THE WHEEL ... THE EMERGENCY TILLER MOVES THE WHOLE STEERING UNIT ASSEMBLY, INCLUDING CABLES AND QUADRANT” — owner's manual (1988), catalina27.net
    Tiller standard per Sailing Magazine; a wheel became optional late in the run (many post-1984 boats have one). The 1988 builder manual describes only pedestal steering by cables and quadrant, plus an emergency tiller, naming no brand. Edson's Catalina 27 inboard data sheet for its chain-and-wire kit is a retrofit plan, not proof of a factory brand.

Thrusters and steering are often replaced — check the units on your boat before ordering parts.

Originally sold with an outboard well; Atomic 4 inboard optional from 1972, later Universal diesels. Deep, shallow (3.0 ft) and wing keels; tall rig with small bowsprit. Displacement grew over the run (about 5,650 lb early outboard boats to 6,850 lb later). Also built under license in Canada. Replaced by the Catalina 270 in 1991. Builder brochure confirms 6,850 lb displacement, 2,700 lb ballast and 4.0 ft standard draft. Builder history: hull 6,000 built May 1985.

Engines fitted

Boats of the same model can differ — check which engines yours actually has before ordering parts.

Generator

The 1988 owner's manual covers an optional 110 V shore-power system only; no generator appears.

Manuals and brochures online

Hosted by the builder or an owners' association; they own the copyright.

Known problems for this model

1 more
  • Exposed early electrical panel electrical
    Early boats put the switch panel on the port quarterberth face where spray and bilge water can reach it; later boats moved to a breaker panel in a protected spot.
    practical-sailor.com

Engines & parts

Universal Atomic 4 parts: good

Factory optional engine — you entered “Atomic 4 (Universal)”

Tens of thousands were built (sources say from 40,000 to 50,000). Despite being out of production for decades, the engine is well supported: Moyer Marine sells parts, rebuilt engines, fuel pump rebuilds and exhaust parts, and hosts an owners' forum; Old Lyme Marina and others also supply parts, and electronic ignition upgrades are available.

Parts sources: Moyer Marine

Common problems (3)
  • Raw-water cooling scale and corrosion cooling
    Most Atomic 4s are raw-water cooled, so the block scales up and corrodes, especially in salt water; cranking without starting can also flood the engine with seawater through the exhaust.
    goodoldboat.com · moyermarineforum.com · keelindex.com
  • Gasoline vapor fire/explosion risk fuel
    Gasoline vapor is heavier than air and settles in the bilge, so ventilation, blower use and shutting the fuel valve (a stuck carburetor float can overflow) matter.
    goodoldboat.com
  • Ignition and fuel system faults electrical
    Points, condenser, cap and wires, plus gummed carburetors and contaminated fuel, are the most common reasons an Atomic 4 won't run well.
    keelindex.com · goodoldboat.com
Maker’s service schedule (9)
Engine oil & filter change50 hrs
“3. FIFTY HOUR CHECK a. Using sump pump, remove all oil from crankcase. Refill with a good grade oil as specified in Tabl” — manufacturer, westerbeke.com
Fuel filters & water separator50 hrs
“e. Clean fuel pump strainer.” — manufacturer, westerbeke.com
Heat exchanger & oil cooler cleaning50 hrs
“b. Inspect oil cooler and remove any accumulation of grit or dirt.” — manufacturer, westerbeke.com
Clean flame arrestor100 hrs
“b. Inspect flame arrestor to be sure air passages are clean and free from oil. If dirty remove and wash with kerosene.” — manufacturer, westerbeke.com
Check clutch (reverse gear) adjustment100 hrs
“4. ONE HUNDRED HOUR CHECK ... c. Check adjustment of clutch.” — manufacturer, westerbeke.com
Valve clearance check / adjust150 hrs or 1 yr
“5. ONE HUNDRED FIFTY HOUR CHECK a. Check valve tappet adjustment.” — manufacturer, westerbeke.com
Spark plugs inspect / replace150 hrs
“b. Remove, clean, and reset spark plugs.” — manufacturer, westerbeke.com
Transmission fluid change
Universal V-drive unit (V-drive installations only; the standard reverse gear shares engine oil)
500 hrs
“(2) After the first 50 hours of operation, drain unit and refill ... (3) Change lubricant every 500 hours of operation.” — manufacturer, westerbeke.com
Complete overhaul3,000 hrs
“At the end of three thousand hours of operation the engine should be completely overhauled.” — manufacturer, westerbeke.com
Service part numbers (8)
Oil filter
optional add-on oil filter (not standard equipment)
Universal 276236
“2 Element or Cartridge 1 276236 (Oil Group, Oil Filter, Not Standard Equipment)” — manufacturer, westerbeke.com
Raw-water impeller
Oberdorfer N202M-03 / N202M-07 replacement raw-water pump (Universal pump 295625)
Oberdorfer 6593
“5 Impeller 6593 6593 6593 6593 6593 1 (N202M, N202M-03, N202M-07 parts list)” — manufacturer, pumpsandpartsonline.com · “Impeller : Catalog # 6593, Impeller” — dealer, pumpagents.com
Raw-water pump kit
Oberdorfer N202M-03 / N202M-07 raw-water pump
Oberdorfer 10725
“REPAIR KIT N202M N202M-03 N202M-07 10725” — manufacturer, pumpsandpartsonline.com · “Catalog # 10725, Repair Kit, includes O-Ring, Snap Ring, Impeller, 2 x Lip Seal” — dealer, pumpagents.com
Drive belt
alternator belt (Prestolite and Motorola alternators)
Universal 239387
“19 Belt 1 239387 (12 Volt - Motorola 51 Amp Alternator)” — manufacturer, westerbeke.com
Spark plug Universal 273276 × 4
“8 Spark plugs, champion 4 273276” — manufacturer, westerbeke.com
Thermostat
late style, from 1967 / serial #79476 (Holley 145 F, on cylinder head)
Universal 200206
“12 Thermostat Kit 1 200206 consists of 262278 and 261601” — manufacturer, westerbeke.com
Thermostat
Dole type, before serial #79476 (on manifold)
Universal 200207
“13 Kit, Thermostat (consists of 275965 & 261144) 1 200207” — manufacturer, westerbeke.com
Zinc / anode
fresh-water-cooled engines only (Universal heat-exchanger kit)
Universal 299760
“23 zinc pencil 1 299760 (Cooling, Fresh Water System, after serial #79476)” — manufacturer, westerbeke.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.

Sources disagree on first year, last year, number built — left blank rather than guessed.

Model sources (9)

sailboatdata.com · practical-sailor.com · sailnet.com · catalinayachts.com · catalinayachts.com · en.wikipedia.org · catalina27.net · sailingtexas.com · sailingmagazine.net

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Other Catalina models

Researched from public sources. Spotted an error? The sources are listed above — tell us what they got wrong.