Berkeley Jet Drive Model 12JG
 DESCRIPTION: The Model 12JG Jet-Drive is constructed of
a super-tough, high-strength, aluminum alloy, castings the finest
and most serviceable material available. Precision machined and
hard-anodized, assembled with stainless steel fasteners,
assures maximum performance with a minimum of
maintenance. Dissimilar metals are protected from each other by
inert insulators to retard corrosion. Using Berkeley's unique
single stage, mixed flow, impeller, this unit gives maximum thrust
per horsepower. Divided bowl-steering assembly
construction offers the boater the advantage of readily adding
accessories to change thrust angle.
APPLICATION: Ideally suited for vee and modified vee hull
boats, measuring 14 to 24 feet in overall length, with a gross weight
of not over 5,000 pounds per unit, including passengers and gear.
FEATURES: Only one rotating element, the shaft and impeller
assembly. Specially designed intake adapter to assure pump alignment and boat
bottoms matching for efficient performance. Two transom housings to accommodate
transom angles of 0° to 9° and 9° to 18°. A single stage, enclosed, mixed flow,
impeller available in aluminum or stainless steel, machined to match horsepower
involved. Replaceable, insulated impeller wear ring machined to close tolerances for
minimum bypass and high pump efficiency. Strong self-cleaning finger-type intake
grate. Readily accessible and serviceable stuffing box-type shaft seal. Heavy duty,
grease lubricated, ball-type thrust bearing, isolated and sealed for protection from
accidental water damage. Easily accessible handhole for impeller clean out in the
unlikely event of clogging. Cover securely held in place by swing bolts and special
wrench, which may be used for stuffing box adjustment. Long life, oil lubricated,
sleeve-type, tail bearing, sealed from the water. Smooth working steering nozzle and
reverse bucket for effortless steering in forward and reverse. Nozzle O-ring seal
assures minimum spray. Long blade rudder for positive boat handling at low speeds with no appreciable loss
in performance at higher speeds. Steering assembly is removable from bowl for addition of
steering wedge or Droop Snoot.
POWER REQUIREMENTS: Approximately 10 to 27 pounds gross boat weight requires 1 HP.
Higher or lower speeds will be obtained as gross
weight varies. Weight distribution, hull length and
design are other factors affecting total boat performance.
The standard aluminum alloy impeller is used with engines up to 400
HP; over 400 HP, a stainless steel impeller is recommended.
OPTIONAL EQUIPMENT: Handhole extension, stainless steel
impeller, Jetovator, shift-throttle controls, instrument panels,
gauge clusters and wiring harnesses, steering wedge, Droop Snoot.
DIMENSIONS / WEIGHT: Net weight 125 pounds total unit. Dimensions
will vary with different intake and transom adapters and are for estimating
only. Refer to catalog installation drawings for complete dimensions.
- Long Blade Rudder is included with all models.
- Shift requires Type 43BC Cable.
- Specify Impeller Size.
- 12JG with Aluminum `A' Impeller Catalog Number 0203-8-07338.
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12JG PARTS #150-B-07338
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