701 RN Loading up... HELP!

[houligan_747]

So my ski loads up and wont clear out with out riding around feathering the throttle. If i lean the ski over to the left and let the exhaust come out of the water it clears out almost instantly. It loads up if i tail stand or let the ski sit in the water for awhile(really annoying)

So I know my exhaust is loading up with water. And loading motor up(too much fuel)

So to fix it im thinking side exhaust. But everywere i read everyone hates side exhaust ( smoke in the face, super loud). Do you think a exhaust flapper would work like on a 750sxi.

What to do??

 

[Vumad]

I know what I wouldn't do....

Side exhaust.

How about some more info? Motor setup? Compression? Pipe? Carbs and tuning? Etc.

 

[houligan_747]

I know what I wouldn't do....

Side exhaust.

How about some more info? Motor setup? Compression? Pipe? Carbs and tuning? Etc.

Why would you not do side exhaust. Everybody post comments like this with no rhyme or reason why.


Stock 701. 145psi. Factory B Pipe. Singe SBN44.

 

[Vumad]

Why would you not do side exhaust. Everybody post comments like this with no rhyme or reason why.


Stock 701. 145psi. Factory B Pipe. Singe SBN44.

Most skis run rear exhaust and don't have a problem loading up with water. I can't see the benefits being more than marginal. You already know the answer. You said it in the OP. "smoke in the face, super loud". My wife's new SXR came with from exhaust. When idling, it splashes water in your face and blows smoke everywhere. It's annoying as licorice, and for what benefit? None. The extra drag on one side of the hull certainly isn't improving the handling.

I don't know the tuning specs for the single 44, but I would check the specs and consider leaning it out.

 

[houligan_747]

Most skis run rear exhaust and don't have a problem loading up with water. I can't see the benefits being more than marginal. You already know the answer. You said it in the OP. "smoke in the face, super loud". My wife's new SXR came with from exhaust. When idling, it splashes water in your face and blows smoke everywhere. It's annoying as I used a bad word, and for what benefit? None. The extra drag on one side of the hull certainly isn't improving the handling.

I don't know the tuning specs for the single 44, but I would check the specs and consider leaning it out.

Yeah the ski runs great , good looking burn on the plugs. The ski only loads up if you tail stand or let the ski sit for awile( loads up water in exhaust)

The ski has been shortened in the rear. This may have something to do with loading up problem

 

[Vumad]

Are you sure when you lean it to the left you are not unloading the pump too and not just the pipe? We have to reach further when leaning the ski left than right because of the throttle and are much more likely to unload the pump. It may be a perception issue about the exhaust when really you are letting air in the pump, allowing the motor to unload easily.

I understand you plugs are a nice color but plug reading only apply to higher RPM. It's not a normal practice, that I know of, to check your low speed or pop-off settings with plug checks. It's very possible that you have an overly rich low end and too low of a pop-off, or leaking needle and seat, while having a lean top end that is compensating in the mid-high RPM range. Don't trust plug readings for low-mid issues. Try riding at 1500-2000 RPM, then stabbing it to wide open. It should go without any bog or hesitation.

You mentioned the ski loads up when sitting in the water. Try running it on the trailer or with the nose against a solid object, with the air filters off, look at the venturi. You should only see a mist. Any solid drops is a pop-off issue.

Also consider water ingestion as an issue. You could have a bad head pipe gasket, or a damaged (or too open) top screw. Leaning the boat to the left would get the water in the pipe away from the cylinders.

Front exhaust will get you a little more power as the exhaust will breathe easier. However, rear exhaust does not cause a motor to just start bogging, unless something is broken, poorly tuned or unless you are over pressuring your exhaust on big tail landings (but your waterbox should be stopping most of that).

 

[houligan_747]

The pump is definitley in the water cause im ripping a left hand turn while im leaned over to the left to clear out exhaust. Its no doubt the exhaust not being able to push out water. As soon as the water is cleared out it rips , no hesitation no bogg no problems.

If anything i think i need to check my water box is loading up with too much water, i have a jet works valve going to stinger. I have a tdr water box.

I also find it kinda of strange that i dont have too much water coming out the exhaust. But the pissers are pumping water.