Aquasport Mechanicals - things that need a wrench, screwdriver or multimeter > Props

Prop for 22.2 w 200 etec

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wishingwasntinorlando:
I have a restored 1974 22.2 with a 200 Etec on it.
I am currently running a cyclone 4 blade 14 1/2 X 15.
I love the hole shot but can't get the rpms over 4300 with the porta bracket up and the motor trimmed out.
Any recommendations on a 4 blade?

boatnamesue:
What is your etec's spec rpm range at WOT?

Prop pitch selection is not a science, more of an art form because of all the contributing factors.  However, the rule of thumb is for every 1" of pitch the result is 150-200 rpms.  Decreasing pitch increases rpms, and vice versa. 

But in this case your motor is only turning 4300 with a 15" pitch, which is on the low end of prop pitches for a 200hp.  Theoretically, you should be decreasing the pitch by at least 6" in order to get the rpms into spec range, which I assume is between 5000-6000.  4 blade props do run 1" less than a 3 blade, in terms of pitch for pitch.   But something sounds fishy here.  Are you positive a 15" is installed?  And are you positive your engine is performing to its peak?   

wingtime:
The Etec is not like other motors. They give you a operating RPM range and an OPTIMUM WOT RPM. If your WOT RPMS are not in the optimum RPM range you run the risk of burning up your exhaust or having excessive carbon build up. In the case of the 60 Degree 200HP V6 that optimum RPM range is  5600-5850 RPM.

I agree that 4300 is WAY LOW if you actually are running a 15" pitch prop.   The 200 with a 17" pitch should make that 222 boogie.  What is the history of the motor?  I would take it to a dealer and have them run the diagnostics on it.  Most BRP dealers only charge 1 hour to do this.  If you have an injector that is dropping out you risk burning that thing up.  Also Etec are sensitive to any restriction in the fuel supply and have a spec on the maximum allowable vacuum. 

Also how low is the motor mounted?  you should see the anti cavitation plate riding on TOP of the water surface when on a plane. If you can't at least see the plate the motor is mounted way too low.

 

Aswaff400:
is the throttle in fact opening all the way? something as simple as that could be overlooked

wishingwasntinorlando:
The motor is new.  It has 150 hours on it.
Never thought to check the throttle, but wait aren't these wireless?
Yes I'm sure of the pitch its engraved on the prop.

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