stern drive and transom assembly

Question 1

what is first when installing stern drive units

Answer 1

position trim cylinders straight back

Question 2

gimble proper installment

Answer 2

1. install new grease seal to piston using suitable mandrel
2. install and position a new tolerance ring
3. ensure notched edge of bearing carrier faces inward in bore when installing gimble bearing

Question 3

when installing Alpha One stern drive, what gear position is drive and shift control put in

Answer 3

forward

Question 4

what creates water flow in a stern drive

Answer 4

impeller pump

pump is driven by the engine through V-belt, shaft, and gears

Question 5

Alpha 1 and Bravo raw water pump locations

Answer 5

it is mounted at front of engine and may be driven by engine or drive belt

Question 6

reason to replace thermostat

Answer 6

when dealing with overheating engine

current one may have been damaged

Question 7

raw water pump

Answer 7

rubber wheel made to pump raw water to cool engine

Question 8

coolant type mixes with what for storage of raw water system only

Answer 8

propylene glycol antifreeze mixes with tap water

Question 9

why are mercruiser cooling systems so unique

Answer 9

it consists of 2 separate sub-systems, a raw water system and a closed coolant system

Question 10

where does stern drive engine exhaust exit boat

Answer 10

sterndrive transom assembly is a waterproof passages where exhaust exits and water for cooling engine enters

Question 11

what is so important when mounting sterndrives

Answer 11

always check alignment before installing

Question 12

function of gimble ring on transom assembly

Answer 12

Gimble ring pivots on the gimbal housing. The
gimbal ring, controlled by the steering arm, can move from side to side,
turning the drive unit for directional control.

Question 13

what gears drive what gear to transfer power 90 degrees in upper drive housing assembly

Answer 13

drive gear to driven gear

Question 14

why do spiral bevel gear have lower efficiency compared to straight cut gears

Answer 14

more sliding friction

Question 15

how does clutch dog engage gears

Answer 15

moves on the propeller shaft

Question 16

how do you properlly fill a stern drive gear case

Answer 16

Tilt the drive to a 45 degree angle. Remove the fill/drain screw and the
vent plug from the drive unit and allow the oil to drain completely.
2. Position the drive unit so the anti-ventilation plate is level.
3. Use a lubricant pump to fill the drive unit (using the fill/drain hole)
until the oil level is even with the bottom edge of the vent hole with the
drive level.
4. First, reinstall the oil vent plug and the new sealing washer without
removing the lubricant pump from the fill/drain hole; this will create a
vacuum effect so that when you remove the fill hose, you lose less oil.

Question 17

purpose of a gimble bearing

Answer 17

supports the engine side driveshaft

Question 18

closed cooling system contains a mixture of what

Answer 18

antifreeze and water

Question 19

when installing Alpha One 1 sterndrive, which direction do you rotate the propeller shaft to align the U-joint shaft splines to the engine coupler

Answer 19

counter clockwise

Question 20

component that allows raw water source to be turned OFF on an inboard engine when boat is in the water

Answer 20

seacock

Question 21

spiral bevel gear power flow

Answer 21

they provide a smoother power flow with less noise due to more tooth engagement

Question 22

what is shimmed first on the lower unit

Answer 22

pinion gear

Question 23

raw water system with closed cooling system cools what

Answer 23

oil cooler
exhaust
heat exchanger