Newbee Need info 97 Challenger 110hp

[WaveShredder9110]

Anybody know if its ok to run oil injection and 80/20 premix together?
Previous owner did so ,he said added insurance , guessin would run rich , would my plugs foul constantly??? should I continue? He was using XP-S mineral ,Please info would be appreciated.
Also I've been hearing its ok to add synthetic to mineral but not ok to add mineral to synthetic, can anybody verify this? Thanks.

97 Seadoo Challenger single 787/110 hp

 

[kustomkarl]

You should run synthetic oil in your seadoo. I owned one of the same model and year, and seadoo recommends synthetic oil for less carbon build up on the RAVE valves. If you run a pre-mix you will foul lots of plugs. The injector should work ok and here is a simple way to check it.

Here is some information on checking your oil pump;
A quick way to check the oil pump is at an idle on the hose, locate the oil pump disk with the cable on it and rotate if full open at an idle. You should see smoky oil burn, as it pumps too much oil into the engine. The test in the manual is almost impossible to perform. You need to keep the oil pump at a specific rpm and measure how much oil is pumped at a given time frame...Sounds good, but un realistic to do.

Here is information direct seadoo fuel and oil;

Recommended oil and fuel use.​

Use High quality low ASH API TC Injector oil.
Do Not use NMMA TC-W, TC-W2 or TC-W3 outboard motor oils or other ash less type 2 cycle oil. Avoid mixing different brands of API TC oil as resulting chemical reaction will cause severe engine damage. Never mix Mineral or synthetics oil together.

Never use fuel containing more than 10 % alcohol,( Methanol or Ethanol) as severe damage will occur. The minimum of 87 octane is recommended for most engines.


Karl

 

[WaveShredder9110]

97 Challenger

oK , what about the first question ??As he was running both premix and injection and told me to do the same , but manual says just injection, Can I add synthetic to the mineral or should I drain out the mineral first then go synthetic.

Thanks for the help.

 

[kustomkarl]

Here is the proper way to do things;

Here is some information on the oil change in the pump and lines.
Here is some food for thought...
Here is a step by step to the oil pump oil lines;

After you drain the oil from the oil lines and refill them, you have to be sure there is no air in the lines when the engine starts up or it will cause the engine to seize up. You need to fill the oil lines back up with oil. To drain the oil from the Rotary Valve Chamber, use a oil extractor pump to suck the oil out of the hose…it’s the one that is 3/8” diameter. I attach the empty lines back to tank and fill the tank. The oil line going to the oil injector pump attaches to a elbow fitting on allows the oil to flow to the pump. I let the oil drain into the oil line to the pump first and put a small cup at the end of the oil line, to catch the oil coming out of the end of full line. Attach the full oil line to the elbow on the oil pump. There is a bleeder screw on the pump. Lay a rag under the bleeder screw. Open the bleeder screw till the pump has oil coming out. Tighten the bleeder screw. Be sure the oil is full in the small 2 lines also. Let the oil seep out the ends of the small lines to fill the lines as best as you can. Connect the 2 small oil lines from the pump to the carburetors. Where the cable is connected is a Disk,(pump lever) that the cable is attached to. Check that the mark on the pump aligns with the mark on the disk. Apply the throttle with the ENGINE OFF and check that the cable is in sync with the oil injector cable. They should move open and close at the same time. To bleed the 2 small lines and get the bubbles out, start the engine, on the water hose. DO NOT APPLY THROTTLE. Let the engine IDLE. Turn the Disk,( pump lever) that the oil injector cable is attached to, to full open so the air bubbles travel to the carburetors and leave no bubbles in the line. Don’t run the seadoo for more than a couple minutes on the hose.
For the Rotary Valve Gear Shaft, attach the hose on the tank and allow the oil to fill the hose and attach it to the case. Recheck all the oil lines and be sure they aren't leaking any oil. If you still have any questions give us a shout.

Karl

 

[WaveShredder9110]

97 Challenger

Hey Karl, way many thanks I'll do that and let ya know how it all worked , Thank god for good forums.