Highmaster2
Active Member
Bought this red GTX hull in January and have been renovating it. Lots of cleaning buffing, etc. Most of you know what's involved. Put in new (rebuilt) 951. I rebuilt the carbs myself - this is the 3rd set I've rebuilt and the other 2 work like a charm. These carbs passed all pressure and vacuum tests - all the check valves, etc. Accel pump was working to both carbs. Popoff at dead on 20psi for both carbs. All new hoses, filters, etc. HSA screws at 0 turns, LSA screws at 1 1/2 to start with. Stock air box and jetting.
I an using the OEM oil pump but had added oil to the first tank of gas to get a 60:1 ratio for break-in. Engine started easily. Idled smoothly. However, when I tried to come off idle, it would start to increase RPM and then bog and die. Didn't change when it warmed up. No matter how gently I increased the throttle, it would not speed up but a few RPM. After a couple of times of going dead coming off idle, I pulled the choke out slightly and it sped up smoothly. To my small brain this indicated that it was lean on the low end. I opened the LSA screws another 1/2 turn - same problem. Went another 1/2 - same problem.
On the good side, if I could get it to 3,000 RPM, it ran like a charm. Very smooth - even a little throttle would result in good pull and the RAVEs seemed to come in just below 5,000 RPM. Was trying not to go much over 5K as it was during the first hour of break-in.
To make matters worse, each time I returned to my floating dock, I would have to jockey the choke and throttle together so I could smoothly accelerate it up onto the dock without it going dead. On the next to last attempt, it died on approach leaving me headed nose first toward my neighbor's dock. I instantly pulled the reverse lever and restarted, pulling the choke and hitting the throttle at the same time. It died. Big crunch. The noise to my ears was that of two cars hitting head on at 60MPH. Why? I had just spent $500 having the hood, gauge cover and mirrors cleaned up and repainted. AAAARRRGGGGHHHHHH!!!!!!!!!!!!!!!!
Again, in my limited experience, it seems that it is very lean in the low speed circuit. Assuming I'm correct, does anyone have any idea what would cause it to do that? If my diagnosis is wrong, please straighten me out. Thanks for any help.
I an using the OEM oil pump but had added oil to the first tank of gas to get a 60:1 ratio for break-in. Engine started easily. Idled smoothly. However, when I tried to come off idle, it would start to increase RPM and then bog and die. Didn't change when it warmed up. No matter how gently I increased the throttle, it would not speed up but a few RPM. After a couple of times of going dead coming off idle, I pulled the choke out slightly and it sped up smoothly. To my small brain this indicated that it was lean on the low end. I opened the LSA screws another 1/2 turn - same problem. Went another 1/2 - same problem.
On the good side, if I could get it to 3,000 RPM, it ran like a charm. Very smooth - even a little throttle would result in good pull and the RAVEs seemed to come in just below 5,000 RPM. Was trying not to go much over 5K as it was during the first hour of break-in.
To make matters worse, each time I returned to my floating dock, I would have to jockey the choke and throttle together so I could smoothly accelerate it up onto the dock without it going dead. On the next to last attempt, it died on approach leaving me headed nose first toward my neighbor's dock. I instantly pulled the reverse lever and restarted, pulling the choke and hitting the throttle at the same time. It died. Big crunch. The noise to my ears was that of two cars hitting head on at 60MPH. Why? I had just spent $500 having the hood, gauge cover and mirrors cleaned up and repainted. AAAARRRGGGGHHHHHH!!!!!!!!!!!!!!!!
Again, in my limited experience, it seems that it is very lean in the low speed circuit. Assuming I'm correct, does anyone have any idea what would cause it to do that? If my diagnosis is wrong, please straighten me out. Thanks for any help.
Don't tell my wife, my ego is already too big for the house.
