Like Tree0Likes

Engine Hours to Car Miles Calculation

Reply
Old 07-12-2007, 01:37 PM
  #11
Registered
 
Join Date: Jul 2007
Location: San Diego
My Boats: Advantage 28ft Sport Cat w/ pair of 8's
Posts: 989
Default

Quote:
Originally Posted by THLWL View Post
Darrell,

I have a couple of posts going on this (see General Tech Support where it starts out at "Corsa...)". Merc. says it was the "modified exhaust" (Corsa Capt. Call) and not their baby. Corsa says there is nothing in their exhaust causing this. Machine shop says valve stem to guide tolerance it too tight. 4 weeks later and I finally get tired of all the finger pointing and lack of acceptance of responsibility and proceed to (hopefully) repair the motors at my costs (for now). This is a big issue locally (2 other 525's are currently failed with similar symptoms which were built about 6 months before mine) and the local Merc. Rep. is of little help. I would think that Merc. would have flown in someone from the factory for these issues which are located about 1/2 mile apart.



Wow, the whole situation just stinks. Did it end up dropping the valve? It is very strange that 2 other 525's are having the same problems that were built around the same time period.


Darrell.
DMOORE is offline  
Reply With Quote
Old 07-12-2007, 01:53 PM
  #12
Registered
 
sleeper_dave's Avatar
 
Join Date: Apr 2005
Posts: 725
Default

General rule of thumb, i'd say 100 miles in a car = 1 engine hour on a boat. But like any rule of thumb, it's not applicable to everything, and in most cases, it really doesn't mean anything. my old mans boat has 1800 hours on the 454's, but it's a cruiser. 180,000 miles equivalent and still going strong, by my rule of thumb.

Take a supercharged big block engine in about the only automotive application where you'd find that nowadays - drag racing - and your 112 hours is the same as 11,200 miles. Figuring half of that in the car would be 1/4 mile at a time, that's not too far off. Although I do agree that a failure at 112 hours is unacceptable for a 525. For a 1075, that might be acceptable.

Put a blower on your car engine, the life will shorten dramatically. Run your boat around N/A, and spend 95% of the time under 3500 rpm, and it'll life a long happy life.
sleeper_dave is offline  
Reply With Quote
Old 07-12-2007, 03:07 PM
  #13
Geronimo36
Gold Member
 
Panther's Avatar
 
Join Date: Sep 2002
Location: Elkton, MD
My Boats: 36' Apache Warrior / 22' Apache Scout
Posts: 11,838
Default

I still say the miles to hours conversion doesn't make any sense.....

So if X hours is equal to X miles...... what's the difference between these boats that are kept on lakes? The lake boats are "highway miles" and the ocean boats are "offroad hours"?

I really think it's a silly comparision...I'll stick with hours, more importantly the type of hours (cruising vs. WOT).
Panther is offline  
Reply With Quote
Old 07-12-2007, 03:12 PM
  #14
SeaRay Sundancer
Gold Member
 
tblrklakemo's Avatar
 
Join Date: Nov 2005
Location: SW Missouri
My Boats: In the Slow Lane
Posts: 2,914
Default

My truck, 06' silverado, has aprox 950hrs and 25k miles.
tblrklakemo is offline  
Reply With Quote
Old 07-12-2007, 03:36 PM
  #15
Registered
 
The Menace's Avatar
 
Join Date: Nov 2002
Location: Bonita Springs, Florida
My Boats: 46 turbined Skater
Posts: 3,029
Default

With some guys 1 hour of running was a lifetime for that engine.
The Menace is offline  
Reply With Quote
Old 07-12-2007, 03:49 PM
  #16
Registered
 
techman's Avatar
 
Join Date: Jan 2005
Location: Mass
My Boats: Fountain 35 Lightning
Posts: 378
Default

The calculation could balance out if the car side of the equation had the car going uphill, towing a trailer at its tow limit, floored, going through 6 inches of water, in 100 degree air temp. Add a full tank of gas, a trunk full of beer kegs, a canoe on the roof, and a deer strapped to the hood.

Add some ladies in the front and back seats for good measure. Those car to boat hours just might come close!

techman is offline  
Reply With Quote
Old 07-13-2007, 08:56 AM
  #17
Diamond Member #001
Charter Member
Trade Score: (2)
 
C_Spray's Avatar
 
Join Date: Oct 2000
Location: Coastal North Carolina
My Boats: 2000 Formula 382 with Innovation 600's
Posts: 4,789
Default

Quote:
Originally Posted by THLWL View Post
Darrell,
...Machine shop says valve stem to guide tolerance it too tight...
That certainly doesn't sound like anything CORSA did. Exactly what happened/failed in the engines?
__________________
Retired! Boating full-time now.
C_Spray is offline  
Reply With Quote
Old 07-13-2007, 09:15 AM
  #18
Gold Member
Gold Member
Thread Starter
 
Join Date: Jan 2004
Location: Houston, Texas
My Boats: 34 Fountain trip 300's
Posts: 491
Default

The end result was 1 valve on each engine struck a piston.

http://www.offshoreonly.com/forums/s...d.php?t=162844
THLWL is offline  
Reply With Quote
Old 07-13-2007, 01:16 PM
  #19
Registered
 
Playn's Avatar
 
Join Date: Jan 2001
Location: BRENTWOOD, TN
Posts: 4,367
Default

I don't think you can compare the two.....unless your car weights 5000-10000 lbs and you are pushing it thru flood water at 60 plus mph at WOT. IMHO
Playn is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Prostreeter
General Boating Discussion
15
06-10-2007 11:43 AM
gripit
General Boating Discussion
7
10-06-2005 09:48 PM
Maximus
General Boating Discussion
30
01-07-2003 03:06 PM
Ricochet
General Boating Discussion
15
11-04-2002 07:17 AM



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 11:48 PM.


Copyright 2011 OffShoreOnly. All rights reserved.