150 TXRY loosing power

[GoneFishing]

Hi,

My 2000 model 2 stroke V6 150 TXRY (6G4 x 507386) is loosing power and dropping down to a limp as soon as I get up to about 20/22 knots...The oil levels indicator (which show full oil at low speed) start flashing at the same time, but no alarm. I have checked the actual oil level and its full, and the sensor seems to be working cause when I lift it out the oil while the motor is running the alarm goes off

Any suggestions?

Cheers
MarkG

[wildturkey]

Sounds like it may be a clogged fuel filter or gas line. Try hooking up a seperate gas can to the engine and see if the problem goes away. That will bypass the fuel filters and gas tank eliminating that portion. You also should have a small filter on the side of the block that could be the culprit too!

[99yam40]

have you run it with the cowling off and see if the level drops at higher RPM?
That could indicate a partially plugged remote tank oil filter.

When was the last time you drained and cleaned the oil tanks and changed the filters and tested the system like the manual says?

[GoneFishing]

have you run it with the cowling off and see if the level drops at higher RPM?
That could indicate a partially plugged remote tank oil filter.

When was the last time you drained and cleaned the oil tanks and changed the filters and tested the system like the manual says?

Thanks 99yam40

I just bought the boat a little while ago (been out tree times only since i got it)..was told it was serviced just before I got it so I haven't done any of the above yet. Ran fine till this weekend.

Will give it a go over the weekend. Is the filter inside the oil tank?

Cheers

Mark

[rodbolt17]

which Icon on the tach is flashing?
all 3 or far left only?
any RPM reduction should give an audible if its an alarm condition.
DO NOT remove the engine tank switch assy without FIRST draining the engine tank via the ater trap. just say NO.

[jb123]

check your buzzer to ensure its working,sounds like its not
when it goes into reduction check oil level @ main tank
if you dot know if waterpump stats and PRV have been replaced, plan to
does trim gauge show correct height ?

[GoneFishing]

which Icon on the tach is flashing?
all 3 or far left only?
any RPM reduction should give an audible if its an alarm condition.
DO NOT remove the engine tank switch assy without FIRST draining the engine tank via the ater trap. just say NO.

The oil indicator has 3 lines/ bars running horizontal along the bottom of the tac meter when full.... at low rpm all three are on, when the problem occur the right corner line/bar is off and the middle and left one's are flashing - but no alarm.

The alarm is working though as I checked it while we were out and running on low rpm - opend the oil tank and lifter it up - Alarm buzzed straight away.

[GoneFishing]

check your buzzer to ensure its working,sounds like its not
when it goes into reduction check oil level @ main tank
if you dot know if waterpump stats and PRV have been replaced, plan to
does trim gauge show correct height ?

Buzzer is working fine - Checked it

Will do the check on main tank

What is the PRV?

- and what is the correct height it should show on the trim gauge

[rodbolt17]

sounds like its not transfering oil properly.
insure the remote tank is at least 1/2 full and the arrow is lit on the far right bar.


remove the water trap and drain the engine tank.
replace the trap.
turn the key on, you should have 3 bars flashing,audible alarm and the tank should refill in 180 seconds before the transfer pump times out.

the trim doesnt affect oil transfer on 1996 and newer ,ONLY the 1990-95 2.6L V6 motors.
the pressure control valve controls water presure and if defective or leaking can cause a LOW speed overheat.

[GoneFishing]

sounds like its not transfering oil properly.
insure the remote tank is at least 1/2 full and the arrow is lit on the far right bar.


remove the water trap and drain the engine tank.
replace the trap.
turn the key on, you should have 3 bars flashing,audible alarm and the tank should refill in 180 seconds before the transfer pump times out.

the trim doesnt affect oil transfer on 1996 and newer ,ONLY the 1990-95 2.6L V6 motors.
the pressure control valve controls water presure and if defective or leaking can cause a LOW speed overheat.

Thanks rodbolt17 ... really appreciate the help.

All three bars are lit when running at low RPM, its only with high RPM that the right bar disappear and the rest start flashing. I will check levels over the weekend and do the drain test as well (its dark when I get home from work so I cant see anything then )

Cheers
Mark

[GoneFishing]

Thanks rodbolt17 ... really appreciate the help.

All three bars are lit when running at low RPM, its only with high RPM that the right bar disappear and the rest start flashing. I will check levels over the weekend and do the drain test as well (its dark when I get home from work so I cant see anything then )

Cheers
Mark

Ok, problem still there.

Oil in main tank was "VERY" low, so filled it and thought that MUST have been the problem. Couldnt test it last weekend as its been raining with strong winds for the last 2 weeks.... finally got fed up today and took it out in the rain....

It ran good again for the first +/- 2km (at about 3000 rpm) and then the RPM's dropped like before (no oil indicator bars flashing this time though - all 3 on) and could not get it to go past 1800 rpm under load same as before. No problem with rpm's when revving out of gear - get up to max

She idles good when not in gear and starts well (even after problem occurs), but after revs drops and under load it sounded like the ignition timing is retarded

Spark plugs have been replaced (to rule them out) Visual Cylinder internal inspection (with remote camera Scope ) also shows all pistons and cylinders are good,with no damage.

Water pump tell tale is pumping hard and not running hot.

Any help would be appreceated

Cheers
MarkG

[99yam40]

as Rodbolt17 said "any RPM reduction should give an audible if its an alarm condition"
are you getting an audible?
Are you getting any indication on the tach?I would think it should show oil or temp
Did you do the oil transfer test as stated before?
You may need to test the over temp alarm and pull and test the temperature switches and thermostats

I do not believe the tell tail will get hot, it just indicates that the water pump is pumping water

[GoneFishing]

as Rodbolt17 said "any RPM reduction should give an audible if its an alarm condition"
are you getting an audible?
Are you getting any indication on the tach?I would think it should show oil or temp
Did you do the oil transfer test as stated before?
You may need to test the over temp alarm and pull and test the temperature switches and thermostats

I do not believe the tell tail will get hot, it just indicates that the water pump is pumping water

Hi 99yam40

No alarm going off - just a drop in RPM.

Nothing showing on the tach - Oil bars full (3 bars) and no flashing like it did before when the main tank was empty.

The Temp indicator has no lines/bars/light showing at all and never has (not sure what it is supposed to show to indicates temp)

I did not do the oil transfer test as I thought the bottom tank being very low was the problem, but will do it now. I did check the oil sensor alarm and it does work.

How would you take out the Thermo switch?

Thanks again for your help

Cheers
Mark

[GoneFishing]

You may need to test the over temp alarm and pull and test the temperature switches and thermostats

Thermo Switch and Cooling Water Temp sensors both work. Thermo Switch 100% in spec, Cooling Water Temp Sensor resistance readings a little above spec at 100 deg C - 3.59 instead of 3.02 -3.48 but in spec for lower temps (was hard to get temp to exact 100 and keep it there, so that could also be why) Would that matter?

Next - How would I check the alarm?

Cheers
Mark

[GoneFishing]

sounds like its not transfering oil properly.
insure the remote tank is at least 1/2 full and the arrow is lit on the far right bar.


remove the water trap and drain the engine tank.
replace the trap.
turn the key on, you should have 3 bars flashing,audible alarm and the tank should refill in 180 seconds before the transfer pump times out.

.

Did the oil transfer test - Drained tank and switched on key. It filled to about 10mm above bottom line on Engine Tank before pump stopped. Buzzer stopped a little before-

I use to have it fuller than the top line (using the override switch) on the tank. Could that have caused the problem??

Cheers
Mark