thedude
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- Feb 22, 2018
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So I just rebuilt the carbs and put in new plugs in my 1993 48 hp spl. It was not running at idle but would start choked right away. I eventually got it to idle but it isn't perfect. I believe I still need to adjust the low speed needle in the carb to fine tune the carbs. A few questions and things I would like to confirm.
1. Should I remove the needles completely and clean them? And spray carb cleaner into the open hole?
2. I understand the default position is to completely seat the needle and then back off 1.5 turns. Then adjust slowly from there.
3. What is the best way to tune 2 carbs? Top then bottom? Adjust them one at a time or make the same adjustment for both?
4. I understand I should do fine tuning in full submerged water (not just muffs). Some recommended in lowest forward gear?
5. I had a fair amount of oil coming out the exhaust after burning nearly a gallon of gas. Is this normal unburned oil from idling so long or could it be related? Or could I have another issue like spark? I put brand new plugs in but didn't check the gap.
6. Should I adjust the idle adjsutment screw after all this and do I need a tach to get the rpms precise?
Thanks for all the help! A video of it idling.
https://youtu.be/113gGu1UGO0
1. Should I remove the needles completely and clean them? And spray carb cleaner into the open hole?
2. I understand the default position is to completely seat the needle and then back off 1.5 turns. Then adjust slowly from there.
3. What is the best way to tune 2 carbs? Top then bottom? Adjust them one at a time or make the same adjustment for both?
4. I understand I should do fine tuning in full submerged water (not just muffs). Some recommended in lowest forward gear?
5. I had a fair amount of oil coming out the exhaust after burning nearly a gallon of gas. Is this normal unburned oil from idling so long or could it be related? Or could I have another issue like spark? I put brand new plugs in but didn't check the gap.
6. Should I adjust the idle adjsutment screw after all this and do I need a tach to get the rpms precise?
Thanks for all the help! A video of it idling.
https://youtu.be/113gGu1UGO0