Yamaha PZ50MTX Owner's Manual download pdf (Page 66)

Periodic maintenance and adjustment

60

ESU12043

Cooling system

The coolant level should be checked before

each ride. In addition, the cooling system

must be bled at the intervals specified in the

periodic maintenance and lubrication chart.

WARNING

EWS00380

Do not remove the coolant reservoir cap

when the engine is hot. Scalding hot fluid

and steam may be blown out under pres-

sure, which could cause serious injury.

When the engine has cooled, place a thick

rag or towel over the coolant reservoir

cap, and slowly rotate the cap counter-

clockwise to the detent. This procedure al-

lows any residual pressure to escape.

When the hissing sound has stopped,

press down on the cap while turning coun-

terclockwise and remove it.

To check the coolant level

1. Place the snowmobile on a level surface

and apply the parking brake.

2. Remove the top cover (PZ50 / PZ50RT /

PZ50GT / PZ50MT) or open the shroud

(PZ50VT), and then remove the right up-

per cover. (See page 49 for removal pro-

cedures.)

3. Check the coolant level in the coolant

reservoir when the engine is cold. If the

coolant level is below the “COLD LEVEL”

mark, add soft water until it reaches the

“COLD LEVEL” mark. (See the following

section “Replenishing the coolant” for

more details.) NOTICE: Hard water or

salt water is harmful to the engine

parts. You may use boiled or distilled

water, if soft water is not available.

Tap water can be used temporarily in

an emergency.

[ECS00491]

4. Install the right upper cover, and then in-

stall the top cover (PZ50 / PZ50RT /

PZ50GT / PZ50MT) or close the shroud

(PZ50VT).

Bleeding the cooling system

The cooling system must be bled if the cool-

ant reservoir becomes empty, if air can be

seen in the cooling system, or if there is a

cooling system leak. Consult a Yamaha deal-

er.

NOTICE

ECS00500

Operating the engine with an improperly

bled cooling system can cause overheat-

ing and severe engine damage.

Replenishing the coolant

1. Remove the top cover (PZ50 / PZ50RT /

PZ50GT / PZ50MT) or open the shroud

(PZ50VT), and then remove the right up-

per cover. (See page 49 for removal pro-

cedures.)

2. Remove the coolant reservoir cap, add

the recommended coolant until it reaches

the “COLD LEVEL” mark, and then install

the cap.

1. “COLD LEVEL” mark

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