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Old 11-08-2006, 08:15 PM
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Default 2000 Mercury 125 Saltwater Series

Does anyone have any experience with the Mercury 125 Saltwater Series Motor. I am specifically asking about the dependability of the motor and how you like the 2 cylinder at low RPMs increasing to 4 when the demand for power increases.

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Old 11-08-2006, 09:10 PM
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Default Re: 2000 Mercury 125 Saltwater Series

I have the same motor but it is a 2002. So far no problems. It is noisy sounds like it is on its last leg even when it was new. This was my first outboard. I do not like the 2 cylinder thing. It just does not idle smooth after u get about 20 hours on the plugs. But the motor has never left me sitting.
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Old 11-08-2006, 09:22 PM
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Default RE: 2000 Mercury 125 Saltwater Series

i heard (hearsay mind you)they are bad about fouling the two dropped cylinders plugs if you idle at anytime.i was gonna buy a little river boat that had that same motor on it.
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Old 11-08-2006, 09:48 PM
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Default Re: 2000 Mercury 125 Saltwater Series

I had one, same exact model/year as you're asking about. I put almost 500 hours on it and it ran like a raped ape on fire!
Yes, at idle it drops fuel to 2 cylinders, might idle a little rough, but when ya hit the gas that thing will kick in and flat boogy!

I had no issues whatsoever with it, very dependable. Like anything else, maintain it and change fluids and plugs at the recommended intervals. Loved the silent flush deal for it, the oil tank on the motor has enough capacity to do what you need to do for a day, filters are easy to get to and change if needed. I ran Pennzoil Synthetic blend TWCIII oil and used the 90W Pennzoil gear lube oil for the lower unit, never had any fouling issues even with extended trolling.

The only "quirk" of the motor is it's carburated and if not run in a while may take a little bit to warm up, but keep the bulb primed hard and have a good battery especially if boating during winter months. Summer, she fired up just fine. And it's a Merc,, so it's definately loud and has that bad ass merc sound. Definately a loud motor, and she loved to run wide open.

A plus of the motor is if you kill the battery(s) or loose juice somehow, you can pull start the motor.

I had zero problems with mine, ran like a champ and I wish I had two of them on the back of my current boat, I wouldnt hesitate to buy a carb'd Merc 125, good motor. When trolling, to get that lumpa lumpa lumpa feelin out of the motor, I would just move the throttle up a little to find the sweet spot where she'd not be so rough.
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Old 11-08-2006, 10:07 PM
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Default Re: 2000 Mercury 125 Saltwater Series

I have a 2003 and Love it the 2 cyc deactivatied is great for trolling never a minute of trouble
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Old 11-09-2006, 12:29 AM
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Default RE: 2000 Mercury 125 Saltwater Series

I like mine. I have a 2000 125 hp saltwater. I bought it used and have two seasone on it now. No issues. Runs great. A fuel hog when run wide open, at around 4200 I do about 8.5 gph. I am overpropped and underpowered. The motor is ran hard. I try to use the Penzoil semi synthetis but lately have been using the cheap wallmart stough. I think I have around 500 hours so far. No problems at all. I like the 2 cylinder troll, although after about 2k RPM's it will want to kick in the other 2. This means with a heavy boat you hyave a SLOW troll. So if you troll for Wahoo or other fast movers you wotn like it.

I would not hesitiate to buy one.
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Old 11-09-2006, 08:34 AM
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Default RE: 2000 Mercury 125 Saltwater Series

Thanks guys. I really appreciate your comments. They are extremely helpful.
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Old 11-09-2006, 08:56 AM
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Default Re: 2000 Mercury 125 Saltwater Series

I had a 2001 for 3 years and not 1 problem. Very dependable motor. As long as you take care of the motor it will take care of you just like anything else.
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Old 11-09-2006, 11:58 AM
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Default Re: 2000 Mercury 125 Saltwater Series

I have an '05 with about 25hrs on it, been great so far. Not sure if the older one have the same fiter setup, but it is just a small plastic inline cylinder. You should really add a fuel/water seperator to the incoming line just to be safe.
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Old 11-09-2006, 12:47 PM
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Default Re: 2000 Mercury 125 Saltwater Series

i had one, built like a rock crusher. the 2 cyl drop occurs at 1800 rpm according to merc. just change plugs every year and it will start quick. i ran the wally world oil no problem. i have a v6 200 on new boat, reliable engine just more power. fuel consumption is not any issue when you compare hpdi problems and shop costs. i will trade engine noise for less maintance as boats are made to pulled from the house to the ramp not to the shop.
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Old 07-06-2007, 12:27 PM
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Default Re: 2000 Mercury 125 Saltwater Series

anyone else know anything about this motor? Looking to buy one tomorrow after the mechanic goes over it
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Old 07-06-2007, 12:37 PM
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Default Re: 2000 Mercury 125 Saltwater Series

I had one it was a great engine no problems. It will haul the freight and when you drop it to 1700 rpms it does fine and sips the fuel. I did not like the built in oil tank messy to fill and to check the oil level. It does require annual plug change which makes for quick starting an very little smoak. I also used the wally world oil which is a no ash oil which lowers carbon buildup.
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Old 07-06-2007, 12:50 PM
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Default Re: 2000 Mercury 125 Saltwater Series

plug changes are not a problem. Motor looks in really good condition with less than 100 hours on it
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