What should the max rpm be on 16 24' boats?

swatski · Nov 20, 2016

Mainah said:
I am not sure they are critical either. That said RIVA is great at squeezing every bit out of jet skis with mods so I guess they did that out of experience.

Just curious as I am considering doing as you did but really don't want to void my warranty or worse yet bypass the flame arresting safety nature.

Here is my 0.02.
(I won't even tell you how much time I spent reading into it, mostly on greenhulk) I could never find a single piece of evidence that deleting ribbon is detrimental to the engine. Kind of a consensus opinion is that the ECU automatically adjusts to increased air flow resulting in an incremental rise in power and fuel economy. It is a pain to do in SHO/SVHO, as one needs to dismantle the intake manifold, but simple in 1.8 N/As. (and has no real purpose in MR-1s that are extremely well vented from factory.)

It is entirely reversible, does not leave any electronic trace as you are still limited by the electronic OEM rev limiter.

USCG mandates flame arrestors in boats (such as the ribbon in "ribbon delete") even though those play questionable role in fuel injected (not carburated) ignition systems. The simple fix is to change the air filter to a "flame arrestor" type. No need to do this IMO, but if you want to play it safe there are RIVA air filters/flame arrestors to get you USCG compliance. Or a cheap automotive equivalent.

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blacksapphirez · Nov 21, 2016

in my 190 i was able to hit 7700rpm momentarily.

swatski · Nov 21, 2016

blacksapphirez said:
in my 190 i was able to hit 7700rpm momentarily.

Bragger!
LOL

Kane · Mar 13, 2017

@swatski - whats the Snorkel Delete? I'm assuming in the intake, but I'll be doing the Ribbon delete before the boat goes in the water this season...Thanks

swatski · Mar 13, 2017

Kane said:
@swatski - whats the Snorkel Delete? I'm assuming in the intake, but I'll be doing the Ribbon delete before the boat goes in the water this season...Thanks

Yank it out once you open the filter:

Honestly, don't know EXACTLY HOW MUCH that helps, but it does open up the filterbox, so it is a positive change in air flow. Ribbon delete will give you some 150-200 RPM on top, "snorkel" mod maybe another 50. That is assuming you are not riding on the rev limiter (above 7,800 RPM) to start with, of course.

Here are more pics of the air filter box open, snorkels out:

One trick is not to mess with the bolts that hold the filter boxes, just wiggle the boxes out/off of the rubber mounts. You will see what I mean when you look into it in your boat.
Another trick is to use a wood screw to pull the ribbon out, it can be hard to grab/pull out.
I will try to post on the procedure when I have a little bit of time. But it really is pretty strait forward, just disconnect the throttle body, don't loose any bolts, gaskets. Follow RIVA's instructions.