90 SP Help

[dale23]

I just finished overhauling my 90 SP and had it running excellent. Rebuilt carb, fuel pump,cleaned out gas tank, new plugs, gas filter. After towing a wakeboarder the other day it bogged down to an idle. Full throttle would do nothing.
After having it run full throttle and idle after this, out of water, I tried running again in water but the same bogging problem.
Now, I can't get it to fire at all.

I,ve got fuel and spark. The one thing I've noticed is after I tried starting it, with no fire, a lot oil and gas drained out of the exhaust when I tilted the Bow up on the tailer Hmm? Is this just the non-burned fuel getting out?

One other thing is that after purchasing I don't know the age of the oil, would this be critical evan after I,ve had it running great on the same oil?

Any Help Please?

 

[robin savell lloyd]

check compression, if good check for spark, if good carb is probly loading up too rich. good luck:cheers:

 

[dale23]

reply

Thanks, Plenty of Spark and compression on both is 150. I've adjusted the needle screw to exactly 1 turn, as advised by dealer, is there another setting to prevent it from running too rich?

 

[robin savell lloyd]

It seems as if you have a inlet needle not seating. look at spark plugs and see if it has been runing to rich and let us know. :hurray:

 

[dale23]

reply

After trying to start the plugs are wet, when I clean off and replace still nothing.

When you refer to the needle seat is that the main needle, under the throttle linkage, that adjust the high and low speed?

 

[dale23]

needle valve

I've just removed this needle adjusting pin and found the rubber seal to be in good shape, however near the tip of this needle there are some spiral grooves, not super deep but not smooth either.
Could this be a problem?

 

[robin savell lloyd]

The inlet needle is inside the carb it is like the float in your tolet that stops the water from over filling your tank. Well not exactly it would be like the other end of the float witch is a valve that turns the water on and off. but it turns the gas on and off. I hope this does not confuse you even more. I was just hopeing that you may of known about the tolet idea. :hurray:

 

[dale23]

needle

Is this the needle that lets fuel inside the carb that has a spring operated lever on top of it? If so I've rplaced it w/ new.

 

[robin savell lloyd]

yes it does and normally new would be good. but is it seating as it should? most of the time new will work even if you do not know what you are doing but some times an adjustment will have to be made to insure a good seating. lets go back to the basics. replace spark plugs with new and retry with out choke. if no start choke for a few seconds. if no start use a litle starting fluid. then if it tries to start stop with the starting fluid and report back. :cheers:

 

[dale23]

before try

O.K., but before I replace the spark plugs I made sure they sparked by placing them against the engine block, lots of spark, would I still need to replace if they are sparking good like this?

 

[derek]

you could have just over-oiled it running high throttle opening, but low rpm's. then it started bogging, and you were using more throttle and lower rpm's. oil injection is a function of throttle opening, not engine speed.

 

[kustomkarl]

Dale, on you seadoo, I checked the manual and the Low speed screw should be adjusted to 1 1/2 to 2 turns out as a preliminary setting. Set the low speed screw and start from there. If it is at 1 turn it might be your problem.
I read the manual, I'm not just guessing.
Karl

 

[dale23]

carb adjust

My carb only has 1 adjustment screw not 2 like some of the newer models. This screw operates the low and high speed settings. Before this problem started, I had it turned 1 turn and it ran incredible.

 

[dale23]

attn Derek

Wow, could you be more specific? Ie, how would it start bogging when it was running good, any prevention or remedy for this that you may know, I can''t get it to crank.

 

[kustomkarl]

I looked in the manual and it suggested you start at 1 1/2. It is just a starting point...as per the manual. The age of the oil shouldn't matter. Does that model have a in line fuel/ water separator? if so see if it has crap in it. it might be that the crap got into the carb and it gets the plugs wet but not enough to fire, or plugged the passages in the carb.
Karl