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Prop removal questions... |
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Blamey 
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Joined: August-18-2015 Location: White Plains,NY Status: Offline Points: 631 |
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 Posted: June-28-2016 at 10:42pm |
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So is this something I can do myself or do I need somebody with experience? I'm always up for learning a new skill but prefer to avoid the ones when I could make it worse then when I started.
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96 Super Sport
Previously: 95 Sport Nautique, 1980 Ski Supreme |
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MrMcD
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Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3587 |
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Posted: June-28-2016 at 10:48pm |
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If your boat is fuel injected we need advice from those that have adjusted the Fuel Injected GT40 on how to do it. If it is carbureted changing timing is simple but you will need a timing light. A set back Timing light is best so you can check the timing at idle and at all the RPM ranges. It is also important to see your timing curve actuates very smoothly from idle to full advance.
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Blamey
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Joined: August-18-2015 Location: White Plains,NY Status: Offline Points: 631 |
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Posted: June-28-2016 at 11:03pm |
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I have a GT40.
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96 Super Sport
Previously: 95 Sport Nautique, 1980 Ski Supreme |
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gun-driver
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Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4112 |
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Posted: June-28-2016 at 11:23pm |
You really can't adjust the total advance. Maybe by setting base timing a couple degrees heavy you may get more not sure if that would work. "The distributor has no centrical or vacuum advance since the ECA controls the spark timing. Other than setting base timing no distributor adjustments are required. |
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lewy2001
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Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234 |
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Posted: June-28-2016 at 11:45pm |
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With the GT40 you can only set the static timing the rest of the time the GT40 ECM adjusts the timing depending on input from all other sensors it has a range of twenty odd degrees from memory that it adds to the static timing from the table in the ECM.
Base timing per manual is 5 deg BTDC with Spout disconnected and engine at operating temp. I have played around with this and actually have tried other settings up to 10 BTDC. I had mine set to 8 degrees with the GT40 ECM. Tried this setting on another GT40 at GL and could hear a slight ping so set it back to standard. The GT40 also has knock sensor that will retard timing if detected. |
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If you're going through hell, keep going
89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
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tryathlete
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Joined: April-19-2013 Location: Lake Villa, IL Status: Offline Points: 1796 |
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Posted: June-28-2016 at 11:52pm |
Thanks, Lewy. I wonder what sort of advance increase you'd be able to achieve on good premium fuel. I run Mobil ethanol free premium 93 octane. I'm not messing with it regardless as I don't see any performance issues with my GT40. I know I don't need 93 but it's the only ethanol free fuel near my home (if you consider 17 miles to be near). |
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Blamey
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Joined: August-18-2015 Location: White Plains,NY Status: Offline Points: 631 |
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Posted: July-06-2016 at 11:17am |
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I have been inspired to look for my missing ponies. I have started a new thread here to discuss my adventure.
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96 Super Sport
Previously: 95 Sport Nautique, 1980 Ski Supreme |
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MrMcD wrote: