Notices

500hp efi

Old 01-29-2002, 05:33 PM
  #1  
Registered
Thread Starter
 
blown formula's Avatar
 
Join Date: Feb 2001
Location: Lake Eufaula, Ok.
Posts: 1,506
Likes: 0
Received 0 Likes on 0 Posts
Post

I hate to see some one get no response at all, I just hope I don't get jumped on again!!
I read in another post that arizona speed does/did a lot of developement work with mercruiser & efi, so you might check it out with them.
blown formula is offline  
Old 01-30-2002, 08:38 PM
  #2  
Drew
Guest
 
Posts: n/a
Post

W.W.> Not sure if your area runs winter time additives but they can cause some extra buildup. The HP motor also seems to run cleaner on 87 octane which you may be using I just know if you run 89 or 92 it will have the black transom you mentioned. You probably know this already but thought I would mention it. Tyler has a good rep but I am not sure how much EFI work they do.
 
Old 01-31-2002, 10:58 AM
  #3  
Charter Member #355
Charter Member
 
CheckmateF1's Avatar
 
Join Date: Oct 2000
Location: North Texas!
Posts: 434
Likes: 0
Received 0 Likes on 0 Posts
Post

Bill, you might want to try and get a hold of Lingamfelter performance. I know he helped Merc alot with the development of the 502MPI Mag. He might also have helped with the 500EFI. There is an article in one of last years PowerBoat mags about his company.
Eric
__________________
Boatless in Texas......for now
CheckmateF1 is offline  
Old 01-31-2002, 04:27 PM
  #4  
Registered User
 
BAJA WILL's Avatar
 
Join Date: Feb 2001
Location: Tampa, Indian Shores Beach
Posts: 3,300
Likes: 0
Received 1 Like on 1 Post
Post

Wild Willy,

My 500efi sooted until I hit about 50 hrs. Then it dropped by about 80%. and runs as clean as expected now.
BAJA WILL is offline  
Old 02-01-2002, 07:54 AM
  #5  
Registered
 
Join Date: Jan 2001
Location: PA and MD
Posts: 1,451
Likes: 0
Received 0 Likes on 0 Posts
Post

Has anyone looked at their sparkplugs and tried one step hotter sparkplugs. This sounds like a rich condition. The MSD will also help[ in this matter.
cobra marty is offline  
Old 02-02-2002, 11:33 AM
  #6  
Platinum Member
 
Join Date: Oct 2001
Posts: 494
Likes: 0
Received 0 Likes on 0 Posts
Thumbs up

thanks guys for your input!!i will try next heat range in spark plugs and stay will 87 octane fuel!! BILL
wild willy is offline  
Old 02-02-2002, 07:57 PM
  #7  
Registered
 
Tinkerer's Avatar
 
Join Date: Jan 2002
Location: ALTO, MI
Posts: 4,612
Received 4 Likes on 3 Posts
Cool

I would think that hotter plugs would keep the plugs clean but wouldn't change the fuel/air mixture so you would still have the sooting problem. In order to get rid of the sooting you need to lean out the mixture.
Tinkerer is offline  
Old 02-02-2002, 08:23 PM
  #8  
I hate the winter!!
Platinum Member
 
Vinny P's Avatar
 
Join Date: Jul 2001
Location: long island, new york
Posts: 2,707
Likes: 0
Received 0 Likes on 0 Posts
Post

I don't agree with leaning out the mixture. As Cobra Marty has mentioned, increasing the heatrange of the plug or adding an M.S.D. will lessen the transom soot to some degree. The reason being that the hotter plug or increased spark with an M.S.D. will more thoroughly burn the air fuel mixture. Personally, I have already installed an M.S.D. this winter. But, I can't tell you any results yet. It's still winter in the North East.
Vinny P is offline  
Old 02-03-2002, 11:43 AM
  #9  
Registered
 
boathead's Avatar
 
Join Date: Feb 2001
Location: Big Rapids, MI
Posts: 346
Likes: 0
Received 0 Likes on 0 Posts
Post

wild willy,
I am sending my ECM's to Tyler to be reprogrammed, I have talked to a couple people who had him do their ECM's and they are quite happy with the results, he charges $250 a piece to do 'em. I am also going to try #10 rapidfire plugs this year(they are a direct interchange from the MR43TS that are standard equipment).
Paul
boathead is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
boating37
General Racing Discussion
0
01-21-2008 05:28 PM
rslick
General Q & A
9
02-04-2007 07:06 AM
txriverrat2001
General Q & A
0
08-15-2006 07:38 AM
ripride1
General Q & A
9
05-31-2006 10:49 PM
Sonny Spectre 30
General Boating Discussion
2
04-25-2003 08:27 PM

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


Quick Reply: 500hp efi


OSO Sponsor
OSO Advertiser
OSO Advertiser

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.

OSO Advertiser