New to me 2001 Ultra 150 questions

[Colorthumb]

What would be your guys intake grates of choice? Modded stocker?

[beekermartin]

Thanks! I have a couple more questions if yall don't mind. What should the compression be for a stock ultra 150 motor ? Also the ultra 130di. My 150 has an ada head with unknown domes in it, comp reads 120, 120, 125. The 130 reads 119, 119, 120. My friends 150 reads 112, 112, 112. What would a brand new rebuilt motor measure? My 150 does 60, my friends does 62, 63.. my 130 does 56..

Chris

I have an ADA head on my 1200 STX-R which has the same motor. The domes in the head are replaceable. You would need to remove the head and look on the back side of the dome to know the size. I have 42cc domes in mine which means I have to run 92 octane or higher. My engine has also been rebuilt a few times recently. My compression is between 140-145 psi on all three cylinders with the 42cc domes. If you have 44cc domes then you would be about 20 psi less. Stock is usually around 110-120 psi. According to ADA's website the stock heads are equivalent to 46cc domes.

[steve45]

No earthly idea with ADA heads. I think stock should be about 120, but I'm at nearly 3000' elevation and never see 'stock' readings. As long as they're pretty even, you're good.

Speed, I don't know about that either. I've never used GPS or radar on mine, just the dream-o-meter. In pretty smooth water, 1-2 in ripple, I've seen as much as 71 MPH steady, but most of the time about 68 or so. When running against my 310, the 310 slowly walks away and it's speedo reads 67 (which is as high as the speedo will read on that model).

[Colorthumb]

Thanks! I have a couple more questions if yall don't mind. What should the compression be for a stock ultra 150 motor ? Also the ultra 130di. My 150 has an ada head with unknown domes in it, comp reads 120, 120, 125. The 130 reads 119, 119, 120. My friends 150 reads 112, 112, 112. What would a brand new rebuilt motor measure? My 150 does 60, my friends does 62, 63.. my 130 does 56..

Chris

[steve45]

Welcome aboard, Chris!

1/8" ID for the lines going from the pump to the engine. I believe 1/4" ID between the tank and pump, but you better measure it.

[Colorthumb]

What size are the oil lines so I can order tygon hose.

Thanks.
I have a ultra 150 and ultra 130di

Chris

[steve45]

If it has some hesitation, you might try opening the pilot valves (buried near the oil hose nipples) about 1/8 turn and see if that helps.

You can clean the OEM filter by backflushing with solvent.

You may be able to fix the fuel level sender by gently heating it with a heat gun. There is a float that travels in a track and sometimes it gets stuck. Very poor design, and those senders are ridiculously expensive.

Can you adjust the sponson upward? I think that would help if you can.

I've never tried a Shredmaster, but I've heard that they will slow you down 1-2 MPH. Those things bring a lot of money on Ebay.

The only handling mod I've done to mine is making a new bracket for mounting the trim rod. Mine effectively shortens the cable by 3/4", which removes the down trim, leaving only neutral to way up. It rides so much better!

[Cloud_Master]

Little update on this. I ended up pulling out a dixie cups worth of oil from the res. Put in some fresh half way up the window. Got everything put back together and did the initial run on the hose. Smoked like crazy. Probably burning through the oil sitting at the bottom and in the balancer cavity, etc from sitting for 8 yrs. It eventually cleaned up a bit. Took her out to the lake the next day. Was pretty easy on it for the first 15 minutes or so and it slowly seemed to clean itself out and smoke less and less. Eventually, ran pretty good. Very slight hesitation transitioning from 1/4 throttle to full throttle. But it's negligible imo. I'm not racing it, so not a big deal. I'll live with it.

Worst part is my fuel gauge doesn't work. I have a new sending unit on order. Also, since i did not pull the fuel tank, I likely didn't get all the nasty out of there. So i noticed after filling the tank 100% and adding some startron, my new fuel filter by the end of the first tank of gas had some debris in it already, and some floating scum. So i have another filter on order, and i'll change it again after another tank or two of gas. By then i think the tank should be fairly cleaned out.

I don't dig the Agressor sponsons. Cuts too hard with not a lot of steering input. Actually, i don't mind the cutting hard, but i don't like how grabby it is. I want to put the stock sponsons back on and try if i can find a nice clean used set from someone. This machine also has the shredmaster plate and r & d intake grate. I was seeing 60 mph pretty consistent on flat water, and any 6" rippled water i was seeing about 65mph on the speedo. I'm guessing the R&D is slowing me down on the flat water. I'm not sure i dig the shredmaster either. It teetertotters when going anything less than full plane out speeds. It doesn't let the machine just stay flat. It's kinda weird. I'm guessing the stock flat plate wouldn't do that.......

Having never ridden this ski with the stock parts, i can only speculate. I don't have the stock parts to try either.

[steve45]

I don't know much about the balancer shaft bearings, you'd have to look in the manual for that. I don't think it would hurt to overfill them, but don't know for sure.

The check valves (actually pop-off valves) are under the nipples for the oil lines in the carbs. The purpose is to prevent oil from flooding the engine during storage. They should open at 4-5 PSI.

[Cloud_Master]

There isn't one. You need to add the oil when you are assembling the engine. That is why I said it isn't easy to check it. There is no way to as far as I know. Before you install the balance room cover you add the oil when assembling the engine.

Ahh, gotcha. Thanks.

[beekermartin]

Where is the port to add oil to this balance room anyways? The book doesn't make it clear to me? I didn't see another cap like the front stator cover had.

There isn't one. You need to add the oil when you are assembling the engine. That is why I said it isn't easy to check it. There is no way to as far as I know. Before you install the balance room cover you add the oil when assembling the engine.

[Cloud_Master]

I probably wouldn't worry about the balance room area since there is no easy way to check it unfortunately. Like I said earlier I don't know if it being overfilled can cause an issue or not. Maybe someone else here will post an answer about that.

Where is the port to add oil to this balance room anyways? The book doesn't make it clear to me? I didn't see another cap like the front stator cover had.

[Cloud_Master]

Here is a pic of the oil pump outputs. You probably already know this but I figured I would post the pic to make sure.

Yep, i have the page in the back of the book marked just to verify now.

[beekermartin]

Yup, all makes sense. and the oil lines are no issue, i did one at a time for the balance shafts, and the carb lines were 3 different lengths, pretty self explanatory the longest going to the furthest away carb, and so forth.

I'll use my oil extractor pump and see if i can pull some out of the area with the sight glass. What do i do about the other area? And how is it accessed? I didn't see it in the manual i have.

Thanks for the help guys.

I probably wouldn't worry about the balance room area since there is no easy way to check it unfortunately. Like I said earlier I don't know if it being overfilled can cause an issue or not. Maybe someone else here will post an answer about that.

[beekermartin]

Here is a pic of the oil pump outputs. You probably already know this but I figured I would post the pic to make sure.