After 16 months on a new Power Head my 50 Merc started to seize at top
end. Compression test showed #1 & 3 at 128 and #2 at 26 pounds.
Separated the crack case and found the oil pump gear was stripped.
Mercury shop said they had never seen a 50 with that problem. I
couldn't believe that a Plastic GEAR was used to supply oil to the
engine!

I'm not happy trusting a plastic gear on the crank case to supply oil
to the engine. I'm looking for advice on removing the oil injection
system and premixing.
1. Is this adviseable
2. Do I remove the oil pump and block with a plate
3. How do I remove the oil buzzer and not affect the over heat alarm
4. I don't idle much. Will this have a negative affect on the engine

At least that way I'll know for sure that the engine is being
lubricated.

2003 Mercury 50 HP
Serial Number OT840672
3 Cylinder / 2 Stroke Engne

Any input appreciated.
Dan Ayo

I can answer the first question and probably the second and fourth.
1. It's highly advisable -I looked into this a couple years ago when I
bought a '88 200hp which had been "converted".
2. My engine's oil pump had been removed and a plate substituted.
4. Shouldn't have any affect but ck your plugs after running, be sure they
don't look "lean". The more oil you add to the gas the leaner the air/gas
mix will be but 50:1 shouldn't be a problem any more than up .001" or .002"
on the main jets wouldn't fix.
LD


"FlyFisher" wrote in message
oups.com...
After 16 months on a new Power Head my 50 Merc started to seize at top
end. Compression test showed #1 & 3 at 128 and #2 at 26 pounds.
Separated the crack case and found the oil pump gear was stripped.
Mercury shop said they had never seen a 50 with that problem. I
couldn't believe that a Plastic GEAR was used to supply oil to the
engine!

I'm not happy trusting a plastic gear on the crank case to supply oil
to the engine. I'm looking for advice on removing the oil injection
system and premixing.
1. Is this adviseable
2. Do I remove the oil pump and block with a plate
3. How do I remove the oil buzzer and not affect the over heat alarm
4. I don't idle much. Will this have a negative affect on the engine

At least that way I'll know for sure that the engine is being
lubricated.

2003 Mercury 50 HP
Serial Number OT840672
3 Cylinder / 2 Stroke Engne

Any input appreciated.
Dan Ayo

Thanks for the reply LD. As soon as the new 50 runs out of warranty I
plan to remove it's oil pump also. I don't trust the plastic gear to
lubricate my engine.
Dan Ayo

LD wrote:
I can answer the first question and probably the second and fourth.
1. It's highly advisable -I looked into this a couple years ago when I
bought a '88 200hp which had been "converted".
2. My engine's oil pump had been removed and a plate substituted.
4. Shouldn't have any affect but ck your plugs after running, be sure they
don't look "lean". The more oil you add to the gas the leaner the air/gas
mix will be but 50:1 shouldn't be a problem any more than up .001" or .002"
on the main jets wouldn't fix.
LD


"FlyFisher" wrote in message
oups.com...
After 16 months on a new Power Head my 50 Merc started to seize at top
end. Compression test showed #1 & 3 at 128 and #2 at 26 pounds.
Separated the crack case and found the oil pump gear was stripped.
Mercury shop said they had never seen a 50 with that problem. I
couldn't believe that a Plastic GEAR was used to supply oil to the
engine!

I'm not happy trusting a plastic gear on the crank case to supply oil
to the engine. I'm looking for advice on removing the oil injection
system and premixing.
1. Is this adviseable
2. Do I remove the oil pump and block with a plate
3. How do I remove the oil buzzer and not affect the over heat alarm
4. I don't idle much. Will this have a negative affect on the engine

At least that way I'll know for sure that the engine is being
lubricated.

2003 Mercury 50 HP
Serial Number OT840672
3 Cylinder / 2 Stroke Engne

Any input appreciated.
Dan Ayo