Bristol 29.9
Built 1977–1986 by Bristol Yachts
About the Bristol 29.9
Researched from public sources for this model. Any individual boat may have been modified or repowered — confirm before relying on any figure.
- Built
- 1977–1986
- Builder
- Bristol Yachts
- Designer
- Halsey Herreshoff
- Length
- 29.92 ft
- Waterline
- 24 ft
- Beam
- 10.17 ft
- Draft
- 4.33 ft
- Displacement
- 8,650 lb
- Ballast
- 3,600 lb
- Hull
- fiberglass
- Hull / keel
- fin keel
- Rig
- sloop
- Propulsion
- inboard
- Fuel
- 18 gal
- Water
- 63 gal
- Holding
- 25 gal
- Number built
- 216
- Stern thruster
- not fitted
Tank capacities — where the figures come from
-
Fuel 18 gal
No brochure was found. Wikipedia repeats 18 US gal from a spec database, and a 1978 boat's listing gives a close 17 gal. The engine changed over the run (Atomic 4 gas, then Yanmar, then Universal diesel by 1983), so the tank may have changed too.
-
Water 63 gal
Wikipedia gives 63 gal from a spec database; a 1978 listing says 65. There's no builder source.
-
Holding 25 gal
The only other figure is 15 gal in a 1978 listing, for one boat, which isn't enough to change it. There's no builder source.
-
Water heater unknown
No builder document found; the SpinSheet review covers construction and sailing but not the water system.
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
-
Stern thruster not fitted
Our earlier figure of none has no source, and nothing was found either way.
-
Steering unknown
“The rather small 22-inch wheel mounts on an Edson pedestal.” — review, goodoldboat.com · “Another locker beneath the helm seat offers stowage and access to the emergency tiller connection.” — review, goodoldboat.comGood Old Boat confirms our earlier note: a 22-in wheel on an Edson pedestal, with the emergency tiller under the helm seat. No source found says whether the Edson unit is chain-and-wire or geared.
Thrusters and steering are often replaced — check the units on your boat before ordering parts.
Standard low-aspect fin keel 4 ft 4 in; keel/centerboard version 3.5 ft board up, 7.5 ft down; tall rig optional. Ballast is lead inside the integral keel, glassed over, so there is no external keel joint. Solid hand-laid hull, balsa-cored deck; butyl-sealed hull-deck joint on an inward flange, closely through-bolted. No molded liner; bulkheads tabbed to hull. Engines by era (sailboatdata): Atomic 4 originally, later 15 hp Yanmar, 16 hp Universal diesel standard by 1983. Early boats had luan interior joinery, later teak. Two galley layouts.
Engines fitted
-
Atomic 4 (Universal) — gas, single
standard
Wikipedia: initially fitted with a Universal Atomic 4 gasoline engine.Sources: en.wikipedia.org
-
Yanmar — 15 hp, diesel, single
standard
Wikipedia: the Atomic 4 was replaced in production by a 15 hp Yanmar diesel.Sources: en.wikipedia.org
-
Universal — 16 hp, diesel, single
standard
Wikipedia: later a 16 hp Universal diesel was used.Sources: en.wikipedia.org
Boats of the same model can differ — check which engines yours actually has before ordering parts.
Generator
No source mentions a generator.
Known problems for this model
-
Awkward engine access engine
The engine sits under the cockpit sole; reaching the alternator, oil dipstick and raw-water pump means removing companionway panels, emptying the sail locker or working through a galley door.goodoldboat.com
-
Small engine for the displacement engine
The 15-16 hp diesels move the boat near hull speed in flat water, but Good Old Boat suggests a bit more power for pushing into big seas and wind.goodoldboat.com
-
Poor ventilation, mold risk interior
Fixed saloon portlights, one overhead hatch and no deck vents leave the cabin stuffy; mold and mildew are likely without added fans or vents.goodoldboat.com
-
Balsa-cored deck deck
The hull is solid glass but the deck is balsa-cored, so sound the deck around fittings when surveying.goodoldboat.com
Engines & parts
Universal Atomic 4 parts: good
Factory standard 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 change | 50 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 separator | 50 hrs | “e. Clean fuel pump strainer.” — manufacturer, westerbeke.com |
| Heat exchanger & oil cooler cleaning | 50 hrs | “b. Inspect oil cooler and remove any accumulation of grit or dirt.” — manufacturer, westerbeke.com |
| Clean flame arrestor | 100 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) adjustment | 100 hrs | “4. ONE HUNDRED HOUR CHECK ... c. Check adjustment of clutch.” — manufacturer, westerbeke.com |
| Valve clearance check / adjust | 150 hrs or 1 yr | “5. ONE HUNDRED FIFTY HOUR CHECK a. Check valve tappet adjustment.” — manufacturer, westerbeke.com |
| Spark plugs inspect / replace | 150 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 overhaul | 3,000 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 (3)
Own a Bristol 29.9? Add her to your boats, then share a photo — names, numbers and faces are blurred before it appears.
Other Bristol models
- Bristol 27
- Bristol 32 1966–1983
- Bristol 35.5 1977–?
Researched from public sources. Spotted an error? The sources are listed above — tell us what they got wrong.