Can`t get the carbs to sync.
07-03-2014, 10:25 PM
#1
Can`t get the carbs to sync.
Fist of I hate carbs , why I have to deal with 1970 technology in 2014 and why I broke my own rules on no carbs no blower motors I`ll never know but it is what it is and another weekend goes by while I`m stuck in the bilge.. (can ya tell I`m frustrated??)
One set of carbs works great, the port set of carbs I can set to idle correctly but then it is about 400rpm lower than starboard at speed. Or I can sync them both to run identical rpm at speed but them the port idles at 2000rpms.
Ive tried every adjustment on those stupid things to no avail.
Any ideas?
One set of carbs works great, the port set of carbs I can set to idle correctly but then it is about 400rpm lower than starboard at speed. Or I can sync them both to run identical rpm at speed but them the port idles at 2000rpms.
Ive tried every adjustment on those stupid things to no avail.
Any ideas?
07-04-2014, 08:32 AM
#6
Thats the problem , its all linkage, Adjust the linkage to close the blades and it opens later than the other one.. Adjust the linkage to open at the same time and it won`t close all the way at idle.
I had the wife working the throttles, my daughter looking at the other carb and myself adjusting the port side.. hour later still the same.
Maybe I need to play with the throttles.
I had the wife working the throttles, my daughter looking at the other carb and myself adjusting the port side.. hour later still the same.
Maybe I need to play with the throttles.
07-04-2014, 08:52 AM
#7
Registered
iTrader: (1)
EFI wouldn't fix Throttles that don't open the throttle linkage the same.
Just helping carbs from getting a bad rap. LOL.
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Make sure cables are connected on same position hole on both throttle levers. Some throttles have multiple attachment holes.
Make sure throttle levers are the same. DOH.
Remove throttle cables from carb linkages. Set idle speed using carburetor itself. In idle position Rehook cables so they don't pull on carb linkage. You want cables adjusted so they are just a c-hair from opening throttles. Yes, C-Hair is measurement. LOL.
Obviously, make sure linkage on one motors carbs and engine the same as the other.
On and on. You know the drill.
BTW: Synching with throttle bodies can only really be done 100% with drive by wire.
Just helping carbs from getting a bad rap. LOL.
==================================
Make sure cables are connected on same position hole on both throttle levers. Some throttles have multiple attachment holes.
Make sure throttle levers are the same. DOH.
Remove throttle cables from carb linkages. Set idle speed using carburetor itself. In idle position Rehook cables so they don't pull on carb linkage. You want cables adjusted so they are just a c-hair from opening throttles. Yes, C-Hair is measurement. LOL.
Obviously, make sure linkage on one motors carbs and engine the same as the other.
On and on. You know the drill.
BTW: Synching with throttle bodies can only really be done 100% with drive by wire.
07-04-2014, 11:54 AM
#9
Charter Member # 55
Charter Member
It sounds like you are maxed on the amount of throw for the throttle levers. Your throttle levers should have a multile spots for connecting the throttle cable.
Changing the mounting hole will change the amount of throw.
Changing the mounting hole will change the amount of throw.
07-04-2014, 07:14 PM
#10
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also keep in mind that the more turns a cable makes the shorter the travel it will have. if one cable is routed in a strange way it will change the throw at the carb.
