Chap 243

[Britboater]

2.4 extra mph for an extra 14 gph, no thank you, plus best cruising speed 25.4 @ 2.9 gph as opposed to the Yam 242 27.8 @ 3.0 gph.
Plus, only 0.4 sec quicker to planning speed too.
Evidence why Yam does not need to go supercharged.

 

[ScarabMike]

I love these types of threads...... queue the tuning fork and Vaseline..

<---- Rotax...Sopercharged....45hours....no issues...sips on fuel........handles incredibly. I love my inefficient, loud engine on my inferior non articulating keel, no clean out port equipped Sea Doo clone! Oh and did I tell you guys I also boat in 99% salt water ....

 

[Julian]

Wow @ScarabMike .... lots of positive comments on this boat and you have to emphasize the negatives? Scarabs are nice boats, but not need to rag on the new competition.

That enclosed shaft is interesting, but I'm going to guess if a rope gets sucked in the end result is identical.....rope wrapped around enclosed shaft.

Closed loop cooling would be a real plus for salt water boaters.

 

[OperationROL]

I love these types of threads...... queue the tuning fork and Vaseline..

<---- Rotax...Sopercharged....45hours....no issues...sips on fuel........handles incredibly. I love my inefficient, loud engine on my inferior non articulating keel, no clean out port equipped Sea Doo clone! Oh and did I tell you guys I also boat in 99% salt water ....

You may be a little touchy here. These comments are all based on documented findings not each person's opinion. Most have commented about pluses as well. I like the boat but find the extra Hp to extra Mph numbers to be startling and even you would have to agree. Anyhow, I like the boat. I like your boat. I like many boats. I can find negatives in all of them including mine. When my 2015 242 LS was delivered I posted about pluses as well as things I didn't like.

 

[lashburn1]

...Sometimes I think people believe this is a Yamaha Forum...not a Jet-Boat Forum...

the Yamaha appears to out "perform" the Chap in some Key area, NOISE, Fuel Burn and CleanOuts..are Keys ones. Possible deal breakers for a previous JetBoat owner.

For Someone entering the Market from no Boat at all or a Jet Ski...these Boats are going come down to Style and Price...

I do like the "Style" of the Chap over the Yamaha....but the Yamaha has an edge on Features... and a long list of Customer request to get to this point...
I don't know if the Final Dealer Price on these to would be enough to effect my choice...
Yamaha does not Budge much on MSRP , Chap Does..... so they could be equal or close dollars, when you r talking "out the door" $$$$

IMO, this all good for Jet Boaters

 

[Speedling]

I would bet that the closed loop cooling robs a bit of power.
I also bet that they tune it all so you reach max rpms with both motors and may limit it slightly on pitch for the impellers to do so, for quality sake. If we pitch those things up, i don't doubt you could get a lightly loaded one to 60 plus, and the 21 footer to 65.
From my figures in my studies of jet pumps, if they are using the 155mm pumps sea doo had, then 200hp per pump is the sweet spot. If they go to something like yamahas new 160 mm pump, or if sea doo has something along those lines that would be much better fitted to the 250hp versions. Honestly, 165mm pump with 10 or more thin stainless vanes and then some supercharger workover etc and these things WILL see 70 mph, but that would probably all need to be aftermarket. In any case, when you compare the 400 hp to the 500 hp versions of the same boat, that is why you see hardly any increase in speed. It is an exponential function essentially. A supercharged engine is also less efficient (generally speaking) than thier similar counterparts that aren't.
And no, i won't let you have my equations. I am still tweaking them around. I will say though, that going to 600hp would be a huge mistake for either company unless they want to move to Berkeley drives.

 

[Julian]

I'm delighted to see other brands entering the jet boat market! This can only be good for us all!

But I do agree with prior posts about the lack of clean outs being a major issue. I've had a jet boat for 11 years, and there have been a few occasions (perhaps 5-10) where I got a TINY piece of something (usually a hard wood twig) that for the life of me would not come out with the trusty reverse maneuver. If I'd not had clean outs in these cases I would have had to go swimming (which in April on the Chicago River would have REALLY SUCKED) or back to the dock (which again....this happened to us just as we cleared the lock entering the Chicago river, which would have been a VERY VERY long ride back to the dock). So perhaps not an issue if you boat in Florida in warm water all the time. As others have said...each person's circumstance is different.

 

[JetBoatPilot]

I can tell you that in Florida when the seaweed is in season that having anything other than a Yamaha would be a deal breaker for me. I have owned SeaDoo boats and have clogged up the intake grates to the point where no amount of reverse thrust could unclog it or gravity for that matter. Yamaha's clean out system is in my opinion maybe the very best feature to separate them from all the rest of the new competitors.

We can all comment on fit and finish and fuel economy, looks and price, but at the end of the day we all want to go for a boat ride and enjoy the heck out of it. If the boat won't go or if you get stuck while you're going that is a bad day. In my opinion Yamaha has the best history at getting you out there and back.

Also new fuel burn numbers on Yamaha's 242 were about 5.5 gph per engine at cruise of 28 mph. The guys may want to recalibrate their test equipment before the post 2.5 gph on a supercharged boat.

 

[Julian]

Also new fuel burn numbers on Yamaha's 242 were about 5.5 gph per engine at cruise of 28 mph. The guys may want to recalibrate their test equipment before the post 2.5 gph on a supercharged boat.

Not sure where you see that. I see 8.8 gph on both the video and the test results grid (for the Chap), and 9.4 GPH for the 242 Yamaha (2015).

 

[JetBoatPilot]

Previous poster listed the 2.9 numbers. My tests have shown 5.5 per motor but in ideal circumstances maybe 4.7 per motor could be had.

Not sure 8.8 combined for the chap is accurate with superchargers.

Maybe he meant to say 2.9 mpg.