Offshoreonly.com

Go Back  Offshoreonly.com > Technical > General Q & A
Engine won't get boat on plane - ignition issue? >

Engine won't get boat on plane - ignition issue?

Register
FAQ
Calendar
Today's Posts
Search
Vendor Directory
Notices

Engine won't get boat on plane - ignition issue?

Thread Tools
 
Old 06-23-2014, 10:03 PM
  #61  
Registered
Thread Starter
iTrader: (1)
 
Join Date: Feb 2011
Posts: 2,640
Likes: 0
Received 4 Likes on 3 Posts
Default
Originally Posted by tpabayflyer
I also am using the 24* module with 10* initial and a total of 34 with my 509.....idle is OK.....I have a 22* module as a spare that I can use if I have to buy gas on the water. I use 93 with my 10.2-1 C/R.....I am using a mighty demon 850 and it took me a while to get the idle right. I had to make sure the throttle blades were not open to far at idle and bypassing the idle circuit. I mounted an AEM air/fuel gauge and it really helped getting the idle right..... Here is a quick vid o my idle before tuning and it was very rich a 11.5-1....... It is now around 13.5-14.0 at idle and has a nice, snappy bark now!

http://www.youtube.com/watch?v=y0for...e_gdata_player
My idle started off at around 11 during the dyno session. He enlarged the idle air bleed slightly to address this, and it did take it to around 14 at idle. Cleaned up my black transom disease, but I think we may have leaned it out a little too much. Had to take the idle screws out about 2 1/2 turns to get it to go into gear without stumbling all over itself.
Budman II is offline  
Reply
Old 06-23-2014, 10:06 PM
  #62  
Fast Singles Club
Gold Member
iTrader: (8)
 
the deep's Avatar
 
Join Date: Oct 2011
Location: Raystown Lake , Pa.
Posts: 3,986
Received 387 Likes on 156 Posts
Default
34* is 34* under load or not . Play hell setting timing whilst running down the lake .
the deep is offline  
Reply
Old 06-23-2014, 10:07 PM
  #63  
Registered
Thread Starter
iTrader: (1)
 
Join Date: Feb 2011
Posts: 2,640
Likes: 0
Received 4 Likes on 3 Posts
Default
Originally Posted by the deep
34* is 34* under load or not . Play hell setting timing whilst running down the lake .
Cue up image of Budman screaming down the lake in the boat with my legs hanging out from under the hatch while setting my timing.
Budman II is offline  
Reply
Old 06-23-2014, 10:08 PM
  #64  
SB
Registered
iTrader: (1)
 
Join Date: Nov 2004
Location: On A Dirt Floor
Posts: 13,546
Received 3,116 Likes on 1,403 Posts
Default
Originally Posted by the deep
Play hell setting timing whilst running down the lake .
You first.
SB is offline  
Reply
Old 06-23-2014, 10:13 PM
  #65  
Fast Singles Club
Gold Member
iTrader: (8)
 
the deep's Avatar
 
Join Date: Oct 2011
Location: Raystown Lake , Pa.
Posts: 3,986
Received 387 Likes on 156 Posts
Default
Originally Posted by SB
You first.
the deep is offline  
Reply
Old 06-23-2014, 10:50 PM
  #66  
Registered
iTrader: (3)
 
Join Date: Jul 2004
Location: chicago
Posts: 11,332
Received 71 Likes on 39 Posts
Default
Originally Posted by Budman II
My idle started off at around 11 during the dyno session. He enlarged the idle air bleed slightly to address this, and it did take it to around 14 at idle. Cleaned up my black transom disease, but I think we may have leaned it out a little too much. Had to take the idle screws out about 2 1/2 turns to get it to go into gear without stumbling all over itself.
Yes, dyno operators forget that a boat has to get shifted into gear and have a pretty good load on them at idle speed. This isnt a manual tranny car or a car with a big stall converter. Sometimes you need that fat idle to keep it running. This is a reason you hear them big blower engines surging up and down. Most guys running these big blower carb engines, are also running big props. Shifting an engine into gear with a pair of 18x38P 6 blade props hooked to it, can really lug it down. Its not like shifting a engine hooked to a pair of 21p 3 blades. It takes very little air/fuel to idle an engine neutral, but under load turning a big prop, the demand can be much greater.

. As far as setting the timing, load/throttle position is irrelevant in your case. Setting it in neutral is fine.
MILD THUNDER is offline  
Reply
Old 06-23-2014, 11:16 PM
  #67  
SB
Registered
iTrader: (1)
 
Join Date: Nov 2004
Location: On A Dirt Floor
Posts: 13,546
Received 3,116 Likes on 1,403 Posts
Default
Originally Posted by Budman II
Cue up image of Budman screaming down the lake in the boat with my legs hanging out from under the hatch while setting my timing.
You could play it safer by sitting in a bucket of water, hold ignition wire #1 - at the terminal on distributor of course- and just point a finger from your other hand at the balancer.

If you need a brighter light just grab a buddies Series 7 MSD box.
SB is offline  
Reply
Old 06-23-2014, 11:29 PM
  #68  
Fast Singles Club
Gold Member
iTrader: (8)
 
the deep's Avatar
 
Join Date: Oct 2011
Location: Raystown Lake , Pa.
Posts: 3,986
Received 387 Likes on 156 Posts
Default
Originally Posted by SB
You could play it safer by sitting in a bucket of water, hold ignition wire #1 - at the terminal on distributor of course- and just point a finger from your other hand at the balancer.

If you need a brighter light just grab a buddies Series 7 MSD box.
the deep is offline  
Reply
Old 06-24-2014, 05:40 AM
  #69  
Registered
iTrader: (1)
 
donzi matt's Avatar
 
Join Date: Jul 2003
Location: Moultonborough NH
Posts: 1,339
Received 7 Likes on 5 Posts
Default
It's technical jargon for schmeg and schmootz.
donzi matt is offline  
Reply
Old 06-24-2014, 12:50 PM
  #70  
Registered
 
Join Date: Sep 2013
Location: Ontario, Canada
Posts: 1,087
Likes: 0
Received 2 Likes on 2 Posts
Default
I know F#*k all about carburetors but a local legend drills a tiny hole in the round blade to get some air in without having to open them passed the idle circuit

Thanks to a rusty MSD I haven't run it long enough to test this but after 50 years building carbs who am I to question him! (holley 850)

Originally Posted by tpabayflyer
I also am using the 24* module with 10* initial and a total of 34 with my 509.....idle is OK.....I have a 22* module as a spare that I can use if I have to buy gas on the water. I use 93 with my 10.2-1 C/R.....I am using a mighty demon 850 and it took me a while to get the idle right. I had to make sure the throttle blades were not open to far at idle and bypassing the idle circuit. I mounted an AEM air/fuel gauge and it really helped getting the idle right..... Here is a quick vid o my idle before tuning and it was very rich a 11.5-1....... It is now around 13.5-14.0 at idle and has a nice, snappy bark now!

http://www.youtube.com/watch?v=y0for...e_gdata_player
stimleck is offline  
Reply



Advanced Search

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.