Finished the first carb, tested pressure.... 12 psi.
The pop-off pressure is the pressure at which the needle valve will open thus letting the fuel to enter the metering chamber. SeaDoo Tool Rental! For example... changing the low speed jet affects wide open fuel delivery. If it was overhauled, before testing, it needs to have fuel or WD-40 inside. Otherwise the pressure value will not be accurate. For the sake of it can the fuel pressure be tested with a gauge in line to the carburetor. The exceptions to the rule are the low speed adjuster and the regulator portion. Pop-off pressure testing: 1) Before testing we must make sure that the carburetor is "wet" inside. GP@PPG. Loading... Autoplay When autoplay is enabled, a suggested video will automatically play next. Marty G 5,175 views. Pop-off pressure, (the regulator portion of the Super BN) is a tuneable component of the Super BN and works in conjunction with the low speed jet for good initial throttle response. If you follow the procedures above you should be able to get your ski in good running condition. First, the idle speed and engine smoothness needs to be adjusted properly. Factory rebuild kit used the factory spring. The opposite also applies. If you read the Mikuni tuning manual, it has a section where it shows what needles and seats and which springs will result in which pop-off pressure. The only good way to adjust the carbs is to take the craft to the water, but before you do that though, you need to know the basics of a Mikuni carb and what makes them tick. 2) Connect fuel hose to the fuel inlet of the carburetor. Get discount Sea-Doo Parts at JavaScript is disabled. You “CHECK” the pop-off. Also, adding aftermarket components also requires you to go through the whole adjustment procedures to get the unit to run right. The low speed adjuster has no tuning effect past 1/3 throttle and the regulator portion has no tuning effect past � throttle although it continues to control fuel supply. Started running funny. same result. weird. The components that make up the regulator portion of the Super BN are: 1. 4) Stop pumping. Went thru the curb. Now it seems to be flooding out and barely runs. Setting your pop off pressure on seadoo Polaris yamaha and kawasaki. There is always factors though that will cause you headaches in tuning.
There is basically an order to follow to accurately adjust and calibrate a Mikuni and that�s listed below along with the effect it has. Proper carburetor setup and adjustment is essential for peak performance and longer engine life. Jet Pump Rebuilding Services: New Parts (OSD) Accessories & More Drive/Pump Gaskets Hull/Body Electrical Engine Fuel/Air Parts Nuts Bolts Etc… O-Rings Misc. Next, I�ll go over the carb adjustment order from start to finish. Technical Info. Second, Pop Off Pressure works in conjunction with the Low Speed Jet so changing the jet can correct a pop off problem. 5:12. You must log in or register to reply here. How do I adjust pop-off? tried swapping springs from the kit, and lever arms. 98 Seadoo Sportster 1800 single carb Tags: None. VTS Boot Upgrade Kit Anti-Rattle Kits For Older Doos ! The value of this pressure is a function of the engine, power output and other factors and it will directly affect the air-fuel mixture that the carburetor will deliver to the engine.
so according to the SBN manual, there is no way I should be able to get 12 psi with a 2.0 needle. Mixing and matching aftermarket components can also cause you tuning headaches. 3) Start pumping until desired Psi of pressure ise achieved. Up next $18 DIY Easy Pop Off Gauge for Carburetor - Duration: 5:12.
Used Components. The Magic of the Pop-Off Test. made sure the seats were wet, using original springs. If you have the right parts, you will get the correct pop-off! Non-Wired MPEM Test. If your low speed jet is too small, you can lower your pop off pressure to get the desired throttle response.
Was running great. The reason for adjusting in that order is because several fuel circuits contribute to the total fuel delivery of the carburetor. rebuilding the carbs on my 951. using genuine Mikuni kits. The For example, if your pop off is set slightly too high, you can compensate by increasing the size of the low speed jet. Hello Guest! OSDparts.com Parts List. Parts. New motor. For a better experience, please enable JavaScript in your browser before proceeding. Needle Valve, available in 4 sizes, 1.5, 2.0, 2.3 and 2.5 (Note: Some OEM carbs have 1.2) 2. Did not test the pop off. Fuel pressure testing 08-06-2018, 08:46 AM. The truth is YOU DON’T “ADJUST” pop-off. If the engine isn�t in great mechanical condition, tuning will be a trick.