Muddy
Member
- Joined
- Apr 7, 2007
- Messages
- 24
Hi All,
Been a while since I visited here.
I have a mates boat in my garage today, he says it hasn't been run for a year. I don't think he drained the fuel (bad man!)
It is a fibreglass Enforcer hull with a Zenoah (260 I think - not too sure, as I prefer nitros)
I noticed the choke was still on a small amount, I have made a new choke lever from an old servo horn (now I can turn the **** thing on and off)
I fired it up, tuned the high needle like a chainsaw (lean - peak revs, then richened off a bit to drop the peak revs down a bit) about 1.5 - 1.75 turns out.
Carb is a Walbro.
I now have the idle speed up a bit, just to see where the low needle is best.
It seems good at 1 - 1.5 turns out.
However, after doing this, and settling the idle speed back down, the engine will run very well on a burst of power, but allowing it to come down to idle it revs lower than how I've set it.
Have I just made high end a little too rich?
or is the carb needing disassembly?
It's as though it floods a little when the butterfly drops to idle/closed (open by 1 or 2 mm still.)
fuel is new, plug is a good browny grey. Spark is fat.
I know it's a fuel issue, but I'm running out of ideas.
Anyone???
Been a while since I visited here.
I have a mates boat in my garage today, he says it hasn't been run for a year. I don't think he drained the fuel (bad man!)
It is a fibreglass Enforcer hull with a Zenoah (260 I think - not too sure, as I prefer nitros)
I noticed the choke was still on a small amount, I have made a new choke lever from an old servo horn (now I can turn the **** thing on and off)
I fired it up, tuned the high needle like a chainsaw (lean - peak revs, then richened off a bit to drop the peak revs down a bit) about 1.5 - 1.75 turns out.
Carb is a Walbro.
I now have the idle speed up a bit, just to see where the low needle is best.
It seems good at 1 - 1.5 turns out.
However, after doing this, and settling the idle speed back down, the engine will run very well on a burst of power, but allowing it to come down to idle it revs lower than how I've set it.
Have I just made high end a little too rich?
or is the carb needing disassembly?
It's as though it floods a little when the butterfly drops to idle/closed (open by 1 or 2 mm still.)
fuel is new, plug is a good browny grey. Spark is fat.
I know it's a fuel issue, but I'm running out of ideas.
Anyone???