The Fishing Website : Discussion Forums : ETEC 90 Question https://www.fishing.net.nz/forum/ Thu, 11 Jun 2026 01:47:04 +0000 Mon, 19 Apr 2010 12:02:35 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.01 360 https://www.fishing.net.nz/forum/RSS_post_feed.asp?TID=51529 <![CDATA[The Fishing Website : Discussion Forums]]> https://www.fishing.net.nz/forum/forum_images/web_wiz_forums.png https://www.fishing.net.nz/forum/ <![CDATA[ETEC 90 Question : And here is the owner with the...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=752489&title=etec-90-question#752489 Author: Catchelot
Subject: 51529
Posted: 19 Apr 2010 at 12:02pm

And here is the owner with the final fix...
 
I had a couple of fishing expeditions in the harbour before Easter, then had the boat at marine North for a week while they tested different heights of the motor and props. Things are looking good now with the motor one hole higher than it was and a 15" pitch instead of the 17" it had on it. We now get 5200 rpm WOT
]]> Mon, 19 Apr 2010 12:02:35 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=752489&title=etec-90-question#752489 <![CDATA[ETEC 90 Question : Cheers for info Titahi. I have...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=740389&title=etec-90-question#740389 Author: Ean
Subject: 51529
Posted: 25 Mar 2010 at 8:44pm

Cheers for info Titahi.

I have same year and size Figlass Scamp. First time out was solo and a bit of a hairy ride at as boat became very light up front. Second time out last weekend with 2 pob, 3 tote tanks and full chilli bin got 5200rpm @wot - 32knts on gps. Love the motor. 

]]> Thu, 25 Mar 2010 20:44:14 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=740389&title=etec-90-question#740389 <![CDATA[ETEC 90 Question : Hey Ean, the boat is a 1974 Sea...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=738528&title=etec-90-question#738528 Author: Titahi
Subject: 51529
Posted: 22 Mar 2010 at 9:56pm

Hey Ean, the boat is a 1974 Sea Nymph 14,6. Typically 2 P.O.B , I estiamte the hull weighs about 700-800kgs, including four tote tanks, live bait tank.....etc...etc.
 The accelaration from 2000prm upto 4700 rpm is enough to sit any smarty pants in the stern on his arse. The addition of a full standing head room targa top with clears has dropped the top end down 1 knot, but its very dry!!!
]]> Mon, 22 Mar 2010 21:56:01 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=738528&title=etec-90-question#738528 <![CDATA[ETEC 90 Question : Originally posted by TitahiI have...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=735281&title=etec-90-question#735281 Author: Ean
Subject: 51529
Posted: 16 Mar 2010 at 8:40am

Originally posted by Titahi

I have just clicked up 300 hrs in one year on a 75 ETEC, same block and gear box as the 90, but different Computer mapping and injectors. I intially struggled to reach 5200 rpm, lifted the motor three times untill it is at the highest position possible, also added some blocks which changed the angle of the motor, I was geting upto 32knts but still not obtaining 5200rpm. After reading up about the engines on the ETECH forums I discovered that running the engine without it being able to get to 5200 rpm was detremental to the engine, labouring it, using excessive oil and gas. I swapped out the prop from a 17 inch to a 15 inch with the same pitch, Full rpm is now 5200 top end has dropped to 30knts but fuel and oil consumption have also dropped ( I have a fuel flow meter hooked up to the chart plotter). The addition of a permatrim has added to less fuel consumption at trolling speeds as well as making the boat more stable when planning. I have six empty oil containers for the 300 hours.

Awesome engines!!



Just had a 75etec fitted - what boat do you have and under what load did you reach 5200rpm?

cheers


 



]]> Tue, 16 Mar 2010 08:40:37 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=735281&title=etec-90-question#735281 <![CDATA[ETEC 90 Question : stainless prop came with outboard. previously...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=735232&title=etec-90-question#735232 Author: H2O_dependant
Subject: 51529
Posted: 16 Mar 2010 at 6:53am

stainless prop came with outboard.
previously boat was driven by a 2 stroke 70hp yamaha outboard 1990 vintage, until that broke down in Jan 2 miles from Omaha after a trip approx 10 miles outside of the mokes (approx 110 miles running). Limped in on auxillary which is taken along for such special occasions... avoids those coastguard calls.
Yamaha 70 used to get top speed with same size prop of 34mph empty boat - and that dropped off when loaded  to about 30mph. So newer/larger engine gets about 5 mph more and better econmoy and grunt when loaded down for big trips.
]]> Tue, 16 Mar 2010 06:53:32 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=735232&title=etec-90-question#735232 <![CDATA[ETEC 90 Question : Great comment H2O thanks for that Do...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=735016&title=etec-90-question#735016 Author: Catchelot
Subject: 51529
Posted: 15 Mar 2010 at 8:08pm

Great comment H2O thanks for thatClap
 
Do you know what prop you swing a standard Evinrude one or Stainless Viper one?
 
I have experience with a few 2 stroke 90's (Johnson- OMC) before, but not ETECs, and both were fairly modern and late 1990's models and both would kick this ETEC's ass for acceleration and top end rpm on a similiar sized heavy tinny (Bluefin 530) and Haines Hunter 5m
 
...And both did have smaller props maybe the 15" model not sure, but they were not stainless props.
]]> Mon, 15 Mar 2010 20:08:19 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=735016&title=etec-90-question#735016 <![CDATA[ETEC 90 Question : did a few different test runs...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=735004&title=etec-90-question#735004 Author: H2O_dependant
Subject: 51529
Posted: 15 Mar 2010 at 7:54pm

did a few different test runs initially - loaded up with about 120 litres of fuel in back of boat and 120 liters of water in chilli bin at front of boat plus myself and 4 year old son - boat did 38 mph and was responsive to steering. Went out next day without 120 litres of water in bin and only 50 liters of fuel and found boat at 38 knots was only just in water - which is what made it unstable - small waves passing under each hull would "pop" boat from side to side. Dropping back to 34mph with light load soled problem. With empty boat and flat water can run at 40mph. All these speeds were around 5200 rpm mark give or take 100.
Oil supposed to run in at 40:1 for first 4 hours and then drop back to 80:1.
Done about 25 hours running now for 2 liters of oil 50/50 trolling at 8mph and open running average 30mph.
Approx dunning speeds
on plane about 15mph at 2600 rpm (drags ass a bit first as quite heavy outboard on 520 stabi and no permatrim or the like).
23mph approx 3500 rpm
30mph is about 4200 rpm
40 pmh WOT - 5200 rpm
]]> Mon, 15 Mar 2010 19:54:33 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=735004&title=etec-90-question#735004 <![CDATA[ETEC 90 Question : Ok Mike had her - Moocha, back...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=734988&title=etec-90-question#734988 Author: Catchelot
Subject: 51529
Posted: 15 Mar 2010 at 7:31pm

Ok Mike had her - Moocha, back out in the weekend and this time with 4 POB and it achieved 5200, that I cannot understand how 2 up did 4800, but yet 4 did 5200, unless of course that motor is loosening up more and more with a proper run in perhaps...
 
...any way his comments below...
 
I had a chance to test out Moocher a couple of times and with 4 of us it was pulling 5200RPM. I will continue giving it a few more trials to get a good feel of what it can do before looking at props etc, but as the manufactures recommended top range is 4500 -5500, with the middle of the range being a good point to aim for , I am not panicking at present.  

PS I have done a bit of physics so do understand Diameter and Pitch.  Please don't think I was trying to "wind you up" !!!! (Propeller joke?)

...He has confirmed the shop said his prop is 17" Viper Stainless and have offered him a 15" to try.
 
Any thoughts from the experts?

 
]]> Mon, 15 Mar 2010 19:31:09 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=734988&title=etec-90-question#734988 <![CDATA[ETEC 90 Question : cheers for that...keep that...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=734332&title=etec-90-question#734332 Author: rocko
Subject: 51529
Posted: 14 Mar 2010 at 5:37pm

cheers for that...keep that in mind and have sorted...The boat doesnt have any accessories which wont stay that way for long...]]> Sun, 14 Mar 2010 17:37:32 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=734332&title=etec-90-question#734332 <![CDATA[ETEC 90 Question : For your engine Rocko it will...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=734307&title=etec-90-question#734307 Author: Outboard Performance
Subject: 51529
Posted: 14 Mar 2010 at 4:51pm

For your engine Rocko it will only have one output through the battery cables, so to hook up dual batteries the best way will be the 3 switch set up and a V.S.R
 
I love this set up and recommened to anyone who runs accessories. Especially if you like listening to the stereo, it just means you never ever have to be conserned about being able to get the motor going.
]]> Sun, 14 Mar 2010 16:51:16 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=51529&PID=734307&title=etec-90-question#734307