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01-19-2022, 08:45 PM #16Team Member
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2000 hours would be the rest of my boating life,so if the rebuild was stupid expensive it would be on the next owner.
But I am hoping my two strokes outlive me
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01-20-2022, 08:57 AM #17
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01-20-2022, 10:15 AM #185000 RPM
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Mercury warranties the Sea Pro range to commercial users for 2000 hrs or 2 yrs, at least here they do.
So they must be expecting well over that.
There was a 50 4 stroke a good few years ago that ran over 10 000 hrs on the Okavango delta
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scott reierson liked this post
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01-20-2022, 10:20 AM #19
You have to account for the fact that the naysayers of these engines will on one hand tell you how unreliable they are, then say that they're based off of 20 year old auto tech... Which seems to be pretty damned reliable. The more applicable question may be service (ie, valve adjustment, etc) moreso than rebuild. These motors are pretty badass.
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Speed Jr. liked this post
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01-21-2022, 03:22 PM #208000 RPM
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Brad you also have to realize that the crap oil that was sold to you and the fact the fiberglass crap from you fuel tank going into your 2.5's had alot to do will it look at my 2001 2.5 280 over 375 hours still Virgin it will be rebuilt this year but still going look at Fast John Lentzkow his 28' skater has 1998 280's race version with 300 hours both are finally getting rebuilt and when he took me for a ride 2 years ago he was wot for a very long stretch on the Mississippi between 15-20 miles we still hit 115 not bad and some old paid for obsolete motors it is all how you care of things and if it was built on a Wednesday lol I went for a ride early last summer a Triton bass boat had a new 300R on it the lower end torque was stronger than his 250xs mid was about the same the new 300r had 5 miles per hour more top end he said gas was very close but when I saw him in the fall he had a new 250 xs back on it I asked him why go back 2 prop shaft failures in under 150 hours mercury covered one not the second and he lost both props that cost him alot of money his propshaft was on a ridiculous backorder date so he sold the 300r for more than what he paid for it as is and found a brand new 250xs if I were you try it Brad you can Afford it see if they are better 🤷*♂️ if not bolt your 300x back on
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JBS, Forkin' Crazy liked this post
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01-21-2022, 05:10 PM #21
The new 300R and 450r come with new design one-piece propshaft. Supposed to cure the failures.
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01-21-2022, 05:23 PM #226000 RPM
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01-21-2022, 10:11 PM #232023 Progression 22 w/ 2015 Mercury 300XS. 2018 Kawasaki Ultra LX. 1969 Hustler Wildcat. Gone but not forgotten: 1991 POS GW Invader. 1976 Donzi Hornet II. 1994 Formula 232 LS. 2001 Regal 2660. 1990 Formula 206 LS. 1992 Checkmate Pulse 186 w/ 2003 Mercury 200 EFI. Random assortment of jet skis.
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01-21-2022, 11:18 PM #24
Well **** if I was buying a brand new boat I for sure would want the newest technology available for 15k more. They are 25-32k depending on the versions or who you buy from. It's worth the wait. My dad waited for 10 months for his, im still waiting on mine. I plan on doing a lot of boating. I boated over 200hrs last year, hopefully more this year. $ per hour over the next 5 years, the price difference is nothing. I got rid of my 10 year old technology old school motors. I like new tech, new data systems, cleaner rigging options, more torque, speed, oh and a warranty. Brad is a smart guy, hes been in other cats with the new V8s on them. It's only a matter time before he upgrades.
Jr.Last edited by Speed Jr.; 01-21-2022 at 11:29 PM.
Larry Gempp Jr.
Proud HydroStream Powertour Member
Lots of past boats - 2024 22 Liberator - 450R
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01-22-2022, 11:29 AM #25
[QUOTE=Brad Zastrow;3326954] I thought two things :
#1) That you had older "twin pancake" Pro/Max powerheads.
#2) That you were going to get back to me about why it's better to use Merc O-rings to refurbish the laser type injection @ $390.00 a copy ($1170.00) instead of spending $10.00 @ Palm City hydraulics ... for the same thing.
I even sent you a few groupies to help .. nuttin but crickets
I "axed" back on the first page about part numbers, prices and availability for the "porky's" .. more crickets. Hope no one needs to fix one if that's how it is ..
So they had a guy (many) that has broken a prop shaft, they replaced it with another bad one that also broke. Now they came up with a fix .. and they won't fix the guys motors that they put another bad one in. Or even getting around to having enough in stock to "sell" those guys one. Sweet deal
Price and part # on one of those ... anyone
Those NIC 2.5's were race only motors. Merc offered no replacement sleeves for those motors .. Must have been throw away blocks in their eyes .. and anyone that used them to joy ride needed to have some on the boat, some in the garage and a few @ U.S.Chrome.
Lets round it off to 330 HP for a good, 2.5L, 300x and a 4.6L porkchop.
2.5 = 132 HP / liter .. "mini-brute".
300x = 110 HP / liter .. 100 per liter is considered average, so a touch above.
Porky = 71 HP / liter ... Comatose, but for those that wanna taxi-cab, great fit.
Ray Charles can see that an uninterrupted bore will last longer than one with a bunch of holes in it. That's just common sense.
2.5L has a 2.300" wide exhaust port ..
3.0L is only .030" wider @ ..
Which is gonna be harder on rings ...????
If it's worth $30,000.00+ to get a new motor with a (as proven) marginal warranty, be one of the cool kids be whisper quiet be above having to smell Klotz oil then maybe buying three porky's might be the thing for you ..
Chaz = rememberin , when you could buy a house for $90,000.00
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Forkin' Crazy, David liked this post
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01-22-2022, 11:41 AM #26
Those so called 4.6L porkys as you call them weigh only few pounds more than a 300X with 40% more torque use 87 octane and better fuel economy. The world moves forward. I love the 300X but I am very impressed with 4.6L Mercs. So are many of the boat manufacturers. Almost all new boats sales under 35' are with outboards now. That is why the demand has outstripped supply. Add in supply chain shortages (every industry) makes for a perfect storm.
You forgot to do the math on the 400R, 2.6 Liter 400HP 153hp per liter. The 4.6 450hp is seriously detuned and has been tested at much, much higher hp. I assume the lower unit is what is holding them back from releasing a big fire breathing monster.Last edited by Brad Zastrow; 01-22-2022 at 11:47 AM.
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01-22-2022, 11:46 AM #27
Isn't that why they call them racing motors? So are you REALLY racing them or just running them until their tongues are hanging out?
LOL!!! You talked about cars and their high RPMs.. So how long do they stay at peak RPM? Like in a boat?
I love the Merc 2.5 "race" motors. I have seen 280s live well longer than I expected.
Go buy some new 4 strokes and let us know.
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Stoker boy, mrcrsr liked this post
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01-22-2022, 08:12 PM #28
Lots of haters on here Brad. The "nothing will ever be better than the 2.5 crowd" always chimes in on on big block or new stuff. I live down the road from a drag strip. This is kinda like the guy in the Dodge Neon who ****s on the guy with the Dodge Viper. The "well his engine is 2x 3x bigger" arguement. Lol. Everyone knows the 2.5 is a poor option for big heavy boats. Brad had triple 280s on his rig. What a pain. Went to 3L' s, they were better. The 4.6L will be much better as they have on ALL the big cats. The expectations of longevity is much higher today than it was 25 years ago. It just bothers some people that others get with the times. There is a reason why there were no 120-130+ mph 6 seater 32-42ft cats cruising around with plush interior and sound systems bumping back then. They didn't have the motors to do it. Just funny the Neon guys would all have Vipers.....if they could afford them. Let's just be honest here......Sounds like 2000+ hours BZ.
Now the haters in can continue.....
Jr.Larry Gempp Jr.
Proud HydroStream Powertour Member
Lots of past boats - 2024 22 Liberator - 450R
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01-22-2022, 08:31 PM #29
Brad, having made the switch I can tell you after running and loving the 300x motors I had in the end going with the 400r’s was worth it. I miss the sound of the 2 strokes along with the acceleration but in the end picked up a solid 8-10mph running with a load and fuel mileage is much better with the 400r’s. I averaged 1.5mpg with a best of about 1.75mpg at WOT with the 300x. 400r’s are 2.25mpg with a best of 2.5-2.75mpg or so.
I do not miss the smoke and cost of 2 stroke oil. I personally have not heard of many broken shafts with 300r’s however there has been more failures with the 400r’s and for the 450’s. Most guys today running tunes on the 400’s making 465-485hp. That IMO is what is causing failures along with someone not throttling the boat and just letting it bang the limiter. In todays time all parts are scarce and hard to get. Mercury is no exception. The one piece shafts have broken some as well but not as often. I agree with Chaz and would not even consider the 300r’s. They will be slower and the torque is only better at low RPM. A properly set 300x will out run them for sure. My old set up was 4-5mph faster on top end than other 308’s that have 300r’s. The 300r’s were faster the 300xs’s though. The best motors for the money IMO are the 400r’s. They don’t break, turn a lot of RPM and with a tune can be as fast as the 450’s. But lastly prices on any of the 4 strokes have gotten ridiculous along with the price of new boats! Just some food for thought
Double Rigged
308 Skater w/400r’s
Over-Kill
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01-22-2022, 08:44 PM #30
But haven't you heard? we all have to get with the times. Silly me that I didn't know I could afford a $35,000 motor, here I am sticking to a budget and buying a crappy old 2 stroke like some backwater hick.
That was a joke. There is nothing the matter with any of these motors, would love to have a 300R but my bank account told me no.2023 Progression 22 w/ 2015 Mercury 300XS. 2018 Kawasaki Ultra LX. 1969 Hustler Wildcat. Gone but not forgotten: 1991 POS GW Invader. 1976 Donzi Hornet II. 1994 Formula 232 LS. 2001 Regal 2660. 1990 Formula 206 LS. 1992 Checkmate Pulse 186 w/ 2003 Mercury 200 EFI. Random assortment of jet skis.
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