Are the 420's good?
12-15-2008 | 07:54 PM
#31
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From: Lake Conroe, TX.
With CMI's on them, they wre virtually indestructible unless you just totally abused and mistreated them.
12-15-2008 | 08:13 PM
#33
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From: Lake Conroe, TX.
I don't know why they say that? One of our more historical guru's out here might be a better source. Maybe they were just marketed as 500.
From what I understand the current 525 has a pretty broad band.
If you took a random sampling, I have heard you will get nywhere from 500-585 on a dyno.
This might be the dyno also.
If you hve them, just use them. They are good engines.
12-15-2008 | 08:26 PM
#34
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From: Mine Hill, NJ/Lake Hopatcong, NJ
Did they say 500HP or HP500.
I don't know why they say that? One of our more historical guru's out here might be a better source. Maybe they were just marketed as 500.
From what I understand the current 525 has a pretty broad band.
If you took a random sampling, I have heard you will get nywhere from 500-585 on a dyno.
This might be the dyno also.
If you hve them, just use them. They are good engines.
I don't know why they say that? One of our more historical guru's out here might be a better source. Maybe they were just marketed as 500.
From what I understand the current 525 has a pretty broad band.
If you took a random sampling, I have heard you will get nywhere from 500-585 on a dyno.
This might be the dyno also.
If you hve them, just use them. They are good engines.
I heard the same for the 525's, and that they were rated that at the prop.... but what drive..etc...
I don't have them, but I'm trying to weigh the price difference vs. performance between the 420's and 500's since hey should both drop into my hull.
12-15-2008 | 08:28 PM
#35
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From: Scenery Hill, Pa.
New Mercury Racing HP450 & HP 420
Price: $5000
Check these out in the classifides, new adds
Jeff, those are NICE. Wish I had the extra cash. Any new pics?
Price: $5000
Check these out in the classifides, new adds
Jeff, those are NICE. Wish I had the extra cash. Any new pics?
Last edited by Cold Sweat; 12-15-2008 at 08:34 PM.
12-15-2008 | 08:30 PM
#36
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From: Lake Conroe, TX.
They actually said 500 h.p., most likely under ideal conditions
I heard the same for the 525's, and that they were rated that at the prop.... but what drive..etc...
I don't have them, but I'm trying to weigh the price difference vs. performance between the 420's and 500's since hey should both drop into my hull.
I heard the same for the 525's, and that they were rated that at the prop.... but what drive..etc...
I don't have them, but I'm trying to weigh the price difference vs. performance between the 420's and 500's since hey should both drop into my hull.
420's can only be stroked to 496's. 502's can be stroked to 540, and then you have something.
You can also buy my 496's at the right price also. I hate to let them go because of all the time I have in them, but I just on't see a boat in their immediate future.
12-16-2008 | 04:24 PM
#38
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From: Fairway, Kansas ( KC )
Price for 2 sets, any tails ? I'm having my 420's rebuilt, have stock merc manifolds. Those pre gil/mercruiser exhaust are a joke, if any one is still running these, change the rubber gaskets and remove the stainless tails, make sure the water passages are clear of scale. Mine were nearly blocked at the riser and tail flange. I guess the first owner did very little maintenance to the manifold gaskets, and I'm sure it was the cause of both engine failures. I decided to keep the 420's because of their reputation, but will upgrade to roller cams.
12-17-2008 | 01:34 AM
#39
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From: Omaha/LOTO
