Like Tree0Likes

Help! Lost 3 mph

Reply
Old 09-02-2002, 02:27 PM
  #11
Registered
 
Looney Tune's Avatar
 
Join Date: Jan 2002
Location: Northbrook, Illinois
My Boats: 2006 Fountain 42x
Posts: 329
Default

I had same problem on my 358 this summer. I cleaned my air filters and changed the fuel filters. I gained most of the speed back. I will change the plugs and probabley get it all back.
Looney Tune is offline  
Reply With Quote
Old 09-02-2002, 08:34 PM
  #12
Charter Member #1055/Moderator
Charter Member
Thread Starter
Trade Score: (1)
 
GO4BROKE's Avatar
 
Join Date: Feb 2001
Location: CNY
My Boats: Sonic 386
Posts: 4,579
Default

I pulled off the fuel filters and found a little water in the stbd one. I will get new and test the boat tomorrow. I don't have the tools at home to cut open the filters but I'll bring it home tomorrow. I have K&N spark arrestors, I just serviced the filters a couple weeks ago. I will check the plugs, they are 2 year old GM Rapidfires, may be time for new. The heat and humidity are lower now than prev. I don't think its the ignition, but now that I think of it , it is time for new caps and rotors (original)!! Thanks for the help everyone!
__________________
[img][/img]
GO4BROKE is offline  
Reply With Quote
Old 09-03-2002, 09:33 PM
  #13
Charter Member #1055/Moderator
Charter Member
Thread Starter
Trade Score: (1)
 
GO4BROKE's Avatar
 
Join Date: Feb 2001
Location: CNY
My Boats: Sonic 386
Posts: 4,579
Default

I bought the tune up parts but the thunderstorm here is going to delay installation until tomorrow. I'm very frustrated!!
__________________
[img][/img]
GO4BROKE is offline  
Reply With Quote
Old 09-03-2002, 09:45 PM
  #14
Registered User
 
36spectre's Avatar
 
Join Date: Apr 2001
Location: Princeton, new jersey
My Boats: Fast Boats (surprised ?)
Posts: 589
Default

I'm sure that it's something simple. How about the oil level . Could you have overfilled by a quart or two by mistake. Also don't be fooled by the fact that both engines are down. A Bad valve spring on one motor will drag down both motors at top end for example. Check that both motors have the same RPM's through out the Rpm range with the same throttle position. Otto
36spectre is offline  
Reply With Quote
Old 09-08-2002, 07:56 AM
  #15
Charter Member #1055/Moderator
Charter Member
Thread Starter
Trade Score: (1)
 
GO4BROKE's Avatar
 
Join Date: Feb 2001
Location: CNY
My Boats: Sonic 386
Posts: 4,579
Talking YEE HAH! I found them again!

I got my RPM's and speed back yesterday. As a matter of fact , in the cold am (60) I was bouncing off the rev limiter and had to pull back. I like that much better than under revving!!! I had restricted fuel filters, only 31 hrs old. I also pulled out the 80 hr old Rapid Fire spark plugs (platinum, supposed to make power and last 200 years) that looked like crap and cost $4.50 each, and made no discernable running change and replaced them with $1.50 each NGK's that are working great. Also I replaced the caps and rotors because I had forgotten about them . Thanks everyone for the help, I was thrown for a loop because the way the boat felt when it was acting up was very strange and confusing, not like it just needed a tune up. Its really nice to have everyone help by looking at it from a different angle and share their experiences.
THANKS, Chris
__________________
[img][/img]
GO4BROKE is offline  
Reply With Quote
Old 09-08-2002, 08:36 AM
  #16
Registered
 
H2Xmark's Avatar
 
Join Date: Apr 2001
Location: beaumont tx
My Boats: 1997 Fountain 35 Lightning
Posts: 1,703
Default

Great, glad it was something simple, enjoy that boat, I think I am going to replace my fuel filter it has 45 hours on it, still runs good but it is time
H2Xmark is offline  
Reply With Quote
Old 09-08-2002, 08:48 AM
  #17
AT Cult Member #3
VIP Member
 
R Addiction's Avatar
 
Join Date: Oct 2000
Location: Pa.
My Boats: '99 Active Thunder Tantrum
Posts: 20,687
Default

I was going to be a smart ass and tell you to push harder on the sticks.............glad you found you're problem. And you also reminded alot of us to change our fuel filters!! Going to do that now!!!!
R Addiction is offline  
Reply With Quote
Old 09-08-2002, 09:34 AM
  #18
Platinum Member
Platinum Member
 
mcollinstn's Avatar
 
Join Date: Sep 2001
Location: tn
My Boats: 1991 F311SR1
Posts: 5,491
Default

Ultra trick spark plugs are just gimmicks.

NGK/ND/AC/Motorcraft/Champion/Bosch - all make fine plugs in the "normal" category.

I HAVE heard not to use the "small tip" platinum plugs in many applications (namely boats).

A plug with 6,200 separate electrodes, each with a scalloped edge and a groove up the channel that will pick up 3 cabel tv channels is still just a spark plug.


If a plug is the correct heat range, is gapped for the application, and is clean and being fired by an ingnition system that is working properly, thne there is not much to gain with a gimmick plug.

Save your money and just keep spares handy. I change plugs every spring after a run to burn off the motor fog. They always look like they are new.
mcollinstn is offline  
Reply With Quote
Old 09-08-2002, 09:59 AM
  #19
AT Cult Member #3
VIP Member
 
R Addiction's Avatar
 
Join Date: Oct 2000
Location: Pa.
My Boats: '99 Active Thunder Tantrum
Posts: 20,687
Default

3 Cable channels........Where can I get them!!!!
R Addiction is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Boater8987
Drives and Lower Units
12
12-29-2007 12:59 PM
docmanrich37
General Q & A
63
10-18-2006 01:10 AM
LA3
General Q & A
4
07-01-2005 11:27 AM
CObarry
General Q & A
18
04-19-2005 08:31 PM
Formula311-SR1
General Q & A
23
07-16-2004 01:53 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



All times are GMT -5. The time now is 04:07 PM.


Copyright 2011 OffShoreOnly. All rights reserved.