BobP said:
By the way on the YouTube Video, if the motor reaches at least its minimum WOT RPM, (is it 5000 rpm or better by spec for the ETEC?) than he can go all day the motor flat out it is fine confirm with manuf.
For this boat don't know fuel payload I suspect the twins may be under propped a bit to begin with. He's way above planning speed and nothing wrong with underpropping just have to watch the RPMs.
Evinrude provides two specs on WOT, an
operating range (4500-5800) and an
optimum range (5500-5700 RPM). The pros at the Etec site are adamant about propping in the optimum range and some think the "operating range" spec should be removed. At light load with these 17" Rebel props I'm turning 5850 and they told that is fine and that I should say put. The boat also planed on one motor with my old smaller-diameter 19" Viper props for which the WOT was 5600.
There is a thread over there where a dealer, on the engine checkout of a new installation, did a plane-on-one with the second motor still down in the water. So i guess it is safe to do but I still wouldn't want to do it with brand new motors - just superstitious I guess.
The thread is here and I'll condense the two most interesting posts below
http://www.etecownersgroup.com/post/get ... os-6556802
"Just did a sea trial with the 200 HO's. They were rigged on a 27 Grady center console. After 10 years with four stokes all I can say is wow!!!! When I hit the throttle I thought I threw my wife out of the boat (I will take the high high road and keep comments to myself). Power was instant and climbed all the way to max RPM. Those little 200's pushed the Grady to 53 MPH with 19P props. Can't wait to get my boat rigged!!!!!! Updates to follow."
Check out with his new motors on his 29 Sea Vee:
"All I can say is wow!!!! The difference in power is almost hard to put into words. I expected slightly better acceleration but not this kind of power. After a 5 minute idle to where we could run the Etec Mechanic told me to hammer it so I did.[eek][eek][smile][smile] I was on plane in seconds and the acceleration did not quit until I had reached 55 MPH@5900 rpms. The Props that we were running are the Viper 19's. Now I'm not a top end guy so on the next run we brought it down to a comfortable cruise speed around 30 and the engines were loafing along at 3500ish. The next test he had me do was run the starboard engine, shut off port and leave it trimmed down. We hit the throttle and after a 10-15 seconds the boat was on plane with one engine (other still in the water) and at 5000rpms we were making 27 MPH. The 225 Yamahas would not even come close to putting the boat on plane with one motor even with the off engine trimmed out of the water. Don't get me wrong it would get me home but would have only hit around 13 MPH tops. I have not spent time yet dialing in my best efficiency but I have a feeling my best MPG will be around 4200 RPM's with a speed of around 40. Now for the real reason for buying the Etecs was to get some weight of the back of the boat to get the scuppers out of the water. I gained roughly 2 inches of clearance from the water line to the bottom of the scupper. Although that might not sound like much it was exactly the result I was hoping for. One final note is the difference in noise between the Yamaha's and Etecs. The Etec is just a bit louder at idle and low speed but once they are running I think the engine noise is about the same and quite honestly the Etecs just sound meaner! Below are just some numbers for speed comparison. I will have solid numbers when I can get the boat out for some testing.
Yamaha F225 WOT 5900RPM 49-50 with terrible chine walking hard to control at that speed
Etec 200HO WOT 5900 55+ rock solid no chine walking. Biggest issue is speed made my TTop whistle!"
(Back to me - It is interesting that the new props he is using are the props I took off - apparently his 29 See Vee is easier to push than my 27 Sailfish.)
