Getting ready to do spark plug readings, have a few questions
03-28-2012, 10:42 PM
#12
Charter Member #601
Charter Member
If it is a bravo drive, you need to pull it into neutral before the motor stops spinning.. Sometimes it can make it to neutral.. sometimes not, depends on the bump rings on the gears. They need to be spinning to complete a shift.
So pull it into neutral, as soon as you can after the motor is shut down. I usually slow down and then neutral and kill it.. But in a perfect world, you run it hard then kill it.. But at 80mph I wouldnt try that.
So pull it into neutral, as soon as you can after the motor is shut down. I usually slow down and then neutral and kill it.. But in a perfect world, you run it hard then kill it.. But at 80mph I wouldnt try that.
03-29-2012, 01:37 AM
#13
Charter Member # 55
Charter Member
if you have a 4v carb do the primary first,take off the flame arrestor and open throttle just until the secondarys start to open, mark the throttle position..run the boat like mentioned and use your mark on the throttle and adjust accordingly,then do the wot..this way you wont run lein on the primary circuit..
03-29-2012, 09:45 AM
#14
Registered
Gold MemberThread Starter
If it is a bravo drive, you need to pull it into neutral before the motor stops spinning.. Sometimes it can make it to neutral.. sometimes not, depends on the bump rings on the gears. They need to be spinning to complete a shift.
So pull it into neutral, as soon as you can after the motor is shut down. I usually slow down and then neutral and kill it.. But in a perfect world, you run it hard then kill it.. But at 80mph I wouldnt try that.
So pull it into neutral, as soon as you can after the motor is shut down. I usually slow down and then neutral and kill it.. But in a perfect world, you run it hard then kill it.. But at 80mph I wouldnt try that.
03-29-2012, 01:44 PM
#16
Registered
Join Date: Apr 2010
Location: Lake Texoma, OK
Posts: 417
Likes: 0
Received 0 Likes
on
0 Posts
03-29-2012, 02:33 PM
#17
Registered
Gold MemberThread Starter
The one being towed in 
I put a new fuel gauge sending unit in last year and the picture is proof that 1/4 of a tank is really almost empty. The guy towing me is my cousin in his Concord Mach III. Boat was running good that day till I ran out of go juice.
I put a new fuel gauge sending unit in last year and the picture is proof that 1/4 of a tank is really almost empty. The guy towing me is my cousin in his Concord Mach III. Boat was running good that day till I ran out of go juice.
03-29-2012, 09:05 PM
#18
Registered
Gold MemberThread Starter
Got new plugs in. Had trouble starting it tonight but it's 55* outside and I have the choke set all the way open. Going to readjust choke tomorrow and get the idle adjusted up. It's going to be 80* Monday and I'm off work so I figure this will be a great day for testing (and drinking beer)! I've got a 350 with vortec heads and an LT4 hot cam, performer rpm intake, 650 demon. Elevation on the lake is 2995 above sea level. Carb came with 72 primary, 80 secondary. I jetted down to 70 and 78. Any guesses as to how close I will be? Give your thoughts, is it going to be rich, lean, or damn close? I will post pics of the plugs after I make a couple passes to get your opinions.
03-29-2012, 10:06 PM
#19
Registered
iTrader: (2)
Join Date: Aug 2005
Location: Between A Womans Leggs in IL
Posts: 6,306
Likes: 0
Received 1 Like
on
1 Post
fixx
Got new plugs in. Had trouble starting it tonight but it's 55* outside and I have the choke set all the way open. Going to readjust choke tomorrow and get the idle adjusted up. It's going to be 80* Monday and I'm off work so I figure this will be a great day for testing (and drinking beer)! I've got a 350 with vortec heads and an LT4 hot cam, performer rpm intake, 650 demon. Elevation on the lake is 2995 above sea level. Carb came with 72 primary, 80 secondary. I jetted down to 70 and 78. Any guesses as to how close I will be? Give your thoughts, is it going to be rich, lean, or damn close? I will post pics of the plugs after I make a couple passes to get your opinions.
03-29-2012, 10:14 PM
#20
Registered
Gold MemberThread Starter
Set it last year at 32-33. Gonna double Check it and set it 32 full advance.
I'm going to take some extra plugs with me so I can swap them in and idle back to the trailer and not ruin the readings from wide open runs on the installed plugs The guy at the local race shop told me to bring him the test plugs and he will look at the them under light and magnification to tell better what is going on. I don't know much about fire rings and what not and this guy knows his stuff so I'm trusting him to help me out.
I'm going to take some extra plugs with me so I can swap them in and idle back to the trailer and not ruin the readings from wide open runs on the installed plugs The guy at the local race shop told me to bring him the test plugs and he will look at the them under light and magnification to tell better what is going on. I don't know much about fire rings and what not and this guy knows his stuff so I'm trusting him to help me out.
Last edited by 87MagnumII; 03-29-2012 at 10:26 PM.
