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carb issues.. oh what fun.. |
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trn448s 
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Joined: May-23-2010 Location: Lake Lotawana Status: Offline Points: 27 |
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 Topic: carb issues.. oh what fun..Posted: June-04-2010 at 12:40am |
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so basically after my wonderful fuel filter breakdown i decided to pull the carb apart clean and rebuild. I have never really had a strong boat like others. It had a hick up right out of the hole. so it never was strong. I have rode behind other boats and they can pull arms off people when pulling skiers. pulling the carb apart i replaced the power valve and made sure both floats where parallel to the housing when held upside down. injectors cleaned, but i am still having isssues. I don't have the hick up anymore but it is slugish out of the hole. from 20mphs and up it is strong, but it is slugish from 0-10 or so. Its not bad just i know the boat can do more and i can't figure it out for the life of me..
any help would be great.. Tommy |
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horkn
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Joined: September-10-2007 Location: Cedarburg, Wi Status: Offline Points: 1511 |
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Posted: June-04-2010 at 1:45am |
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Have you adjusted the accelerator pump? Does it start a nice spray even between both barrels as soon as the throttle is touched?
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78 martinique- refloored, reinforced, stringers re glassed, re engineered interior
GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
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79nautique
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Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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Posted: June-04-2010 at 10:28am |
What is your base timing set at? and what is the timing at 2K rpm's? |
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boat dr
Grand Poobah
Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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Posted: June-04-2010 at 2:51pm |
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Accelerator pump stroke nor cam need adjustment if Holley parts are used.This is a DFW screw..........
What power valve did you install? New PCM 4160 Holley carbs come with a 2.5 All kits bought from PCM come with the same Probably not the PV that you installed,6.5 or 7.5 possibly Do a plug check, easy way to observe fuel mixture. Black is not GOOD Chocolate Brown = correct Blistered or very clean= too lean |
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trn448s
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Joined: May-23-2010 Location: Lake Lotawana Status: Offline Points: 27 |
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Posted: June-05-2010 at 1:46pm |
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power valve is a 6.5 and the plugs where replaced this year
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trn448s
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Joined: May-23-2010 Location: Lake Lotawana Status: Offline Points: 27 |
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Posted: June-05-2010 at 2:20pm |
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what is the proper gap on spark plugs as well.. maybe i have this wrong..
thanks everyone!! |
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trn448s
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Joined: May-23-2010 Location: Lake Lotawana Status: Offline Points: 27 |
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Posted: June-05-2010 at 2:55pm |
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.035 i believe is the proper gap
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boat dr
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Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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Posted: June-05-2010 at 2:56pm |
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Have you pulled a plug or two for a visual check ?These readings can tell you a lot about your motor and its condition internally....
Slow cam timing,i.e.timing chain wear, will give some of the same symptoms you describe. |
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boat dr
Grand Poobah
Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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Posted: June-05-2010 at 3:03pm |
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That is correct for points type ignition.
Electronic ignition with a good coil will allow a wider gap....... |
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trn448s wrote: