Optional

Trolling

The Volvo Penta trolling function is available for engines with some versions of hydralic reverse gear. Trolling requires two control levers, one for throttle/ gear, and the other to control the slip function. Trolling makes it possible to use higher engine power without increasing boat speed.

WARNING!

If engine speed exceeds the maximum permissible engine speed for trolling (approx. 1000 rpm, depending on reverse gear), the EVC system automatically disengages trolling and full propeller effect returns. Depending on the position that the control lever is in when automatic disengagement occurs, the boat speed can increase rapidly.

Engage the trolling function

1 Move the throttle/gear lever to a position where the engine speed is within the permissible engine speed range and move the slip control lever to a slip position.

Active trolling is indicated by the symbol in the display.

If trolling initializing symbol shows in the display trolling is not ready to use. Gear shifting as normal until trolling is activated. Delay in gear shifting may occur when Trolling is active. At maximum slip there is no propeller effect.

Disengaging the trolling function

1 To disengage the trolling function, move the slip control lever to minimum slip position.

The indication in the tachometer display disapeares.

Low speed

The Lowspeed function is available for engines with some hydralic reverse gear. Boats with powerful engines can have high speed even at idle. The Lowspeed function reduces the boat speed. N = Neutral. Reverse gear is disengaged and engine runs at idle speed. F = Forward idling. Reverse gear engaged for movement ahead and engine runs at idle speed. Maximum slip in reverse gear. R = Reverse idling Reverse gear engaged for movement astern and engine runs at idle speed. Maximum slip in reverse gear. A = Lowspeed active. Propeller rpm is increased with increase of throttle, engine rpm is not affected. B = Lowspeed deactivated. Propeller rpm is increased with engine rpm, engine rpm will increase with throttle.

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RPMX100

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A

B

C

D

E

P0005941

Engaging Lowspeed

1 Move the lever to neutral position. 2 Press the neutral button (N) to activate Lowspeed.

If the message “Lowspeed initierate” (A) followd by the snail symbol (B) in the display the lowspeed function is not ready. Normal gear shifting until Lowspeed is activated.

When Lowspeed is engaged “Lowspeed activated” (C) shows on the display. 3 Active Lowspeed is indicated by the snail symbol on the display. Delay in gear shifting may occur when Lowspeed is active.

Disengaging Lowspeed

1 Move the lever to neutral position. 2 Press the neutral button (N) to disengage the lowspeed function.

The message “Lowspeed deactivated” (E) shows in the dispaly.

Propeller Shaft Brake

In certain operational circumstances the propeller may cause the propeller shaft to rotate when the engine is stopped. This passive rotation is uncomfortable and can be harmful to the reverse gear as its oil pump, which is driven by the input shaft, will not operate when the engine is stopped. The propeller shaft may be allowed to rotate with a stopped engine up to 6–8 hours. After this, the engine must be started and run for at least five minutes for lubrication and cooling of the reverse gear.

In cases where the propeller shaft may rotate faster than in normal operations, e.g. boat under sail, a temperature gauge should be installed for monitoring the oil temperature. Max. permissible temperature for ZF reverse gears is 95°C (203°F). When the above-mentioned regulations cannot be met, or when the shaft needs to be stopped or reasons of comfort, a shaft brake must be fitted. On isolated occasions the propeller shaft flange may be locked in a suitable manner instead.