TollyWally
01-14-2006, 10:28 PM
Hello All,
I'm probably not your typical member. I am a commercial fisherman in Alaska and winter in Puget Sound where I fool around in an old Tollycraft cabin cruiser. BUT... I have a big block chevy with Volvo marinization and I figured this is the place where knowledgable motor heads hang out.
So take pity on a slow boat dude and help me out here.
I have a Holley carb model 4011 list # R 84026-1 year code 2729
It is a spread bore carb with vacuum secondaries. I can't find a specific reference to that particular carb anywhere. I sure would like to know what I have.
Now I mostly run this boat slow- up to 2800-3000 rpms or so. I have a fuel flow meter and am running 10-12 gallons per hour.
When I open up the secondaries the boat runs strong up to redline but the secondaries stick open and idle won't drop below 1200-1500 rpm. I have to kill the motor to get the secondaries to close.
I idle the boat alot fishing and it fouls out. I just got a set of plugs in the next hotter range and plan to run it hard for a bit and see how the plugs look. If they look ok I'm going to try them running slow and see if that helps my fouling problem.
Any input from you guys would be greatly appreciated.
Thanks
TollyWally
I'm probably not your typical member. I am a commercial fisherman in Alaska and winter in Puget Sound where I fool around in an old Tollycraft cabin cruiser. BUT... I have a big block chevy with Volvo marinization and I figured this is the place where knowledgable motor heads hang out.
So take pity on a slow boat dude and help me out here.
I have a Holley carb model 4011 list # R 84026-1 year code 2729
It is a spread bore carb with vacuum secondaries. I can't find a specific reference to that particular carb anywhere. I sure would like to know what I have.
Now I mostly run this boat slow- up to 2800-3000 rpms or so. I have a fuel flow meter and am running 10-12 gallons per hour.
When I open up the secondaries the boat runs strong up to redline but the secondaries stick open and idle won't drop below 1200-1500 rpm. I have to kill the motor to get the secondaries to close.
I idle the boat alot fishing and it fouls out. I just got a set of plugs in the next hotter range and plan to run it hard for a bit and see how the plugs look. If they look ok I'm going to try them running slow and see if that helps my fouling problem.
Any input from you guys would be greatly appreciated.
Thanks
TollyWally