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2000 rx
- Thread starter TonyR
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Hey Tony. Start with the fuel system. Check all the lines everywhere, clean filters. There are small filters inside of the carbs which get clogged easy. Be careful when taking the carbs apart to get to them. Don't tear anything or you'll have to buy a rebuild kit. If you have the gray fuel lines, replace them all with black fuel line hose from an auto parts store.
If you are going to take the time to remove and disassemble the carbs on a nine year old ski then you may as well consider rebuilding them from the get go. I agree with the above...except go ahead and rebuild. The alternative is not cheap and you will regret it when you experience the alternative.
Accelerator pump?......
Your engine setup, the 951, uses the Mikuni accelerator pump set up (I don't know why they put them on some and not others) on the PTO carb. It's a small diaphragm pump set up to give the carbs a shot of gas as you begin to open the throttle plates. After that initial burst of fuel, the manifold pressure increases and the transition from the low speed (primary) and high speed (main) jets are able to increase the rpm now without help from the pump. When your finally at WOT and the engine is tached out, the high speed jet in full control.
If you have no problems after feathering the throttle into the transition phase and it screams at top end, then chances are, the little brass 90* elbows that connect to the side of the carbs, leading from this pump, have gummed up a little.
This can be easily verified if you pull the air box and flame arrestor. Look into the throats of the carbs and with the engine off, squeeze the throttle. You should see a shot of fuel squirting from the nipple inside the carb. You may see it in one carb but not the other.
You'll only get to do this a time or two because you'll squirt the fuel from the lines and it won't build back up until you run the motor.:cheers:
Your engine setup, the 951, uses the Mikuni accelerator pump set up (I don't know why they put them on some and not others) on the PTO carb. It's a small diaphragm pump set up to give the carbs a shot of gas as you begin to open the throttle plates. After that initial burst of fuel, the manifold pressure increases and the transition from the low speed (primary) and high speed (main) jets are able to increase the rpm now without help from the pump. When your finally at WOT and the engine is tached out, the high speed jet in full control.
If you have no problems after feathering the throttle into the transition phase and it screams at top end, then chances are, the little brass 90* elbows that connect to the side of the carbs, leading from this pump, have gummed up a little.
This can be easily verified if you pull the air box and flame arrestor. Look into the throats of the carbs and with the engine off, squeeze the throttle. You should see a shot of fuel squirting from the nipple inside the carb. You may see it in one carb but not the other.
You'll only get to do this a time or two because you'll squirt the fuel from the lines and it won't build back up until you run the motor.:cheers:
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