ETEC 90 on 26X

[Gazmn]

ModsNote: following list of posts are split from another thread ~fc
Motor Upgrade for Dummies

I have the White Saltwater 90 HP on a 97X. While it's nice, there are truths stranger than fiction. I have not gone over 15kts. With or without ballast. I have bottom paint and a lot of Shtuff. Accept the fact this will never be a speed boat.

• 1- Motor comes with trim, tilt lift.
  
  2- I use 4 6 gal Evenrude portable tanks in the usual place. I believe I'm better balanced with the Ballast in. Otherwise I'm tilted back a hint.
  
  3- You'll get about 10 to 12kts with 4 or 5 people. KEEP THE BALLAST IN.
  
  4-Look to do 8 - 10 kts and be happy. I fill a 6 gal every other outing if I'm out for a couple of hrs.
  
  5- 20" shaft
  
  6- At the very least get backing plates aluminum or SS. There's one I saw that had a bracket on the outside too and it would offset the tilt in a favorable way. I don't have this
  
  7- I'm a lousy, new, sailor. And I can't currently disengage engine from steering. Deal with it. You got more ponies than most sailboats.
  
  8- Haven't tried to manually start. I don't believe you could. Get a Perko and 2 Batts. This motor requires 1000 cranking amp Batteries. Don't fool around with your Batts.

My setup cost about 10 Boat Bucks when the smoke cleared. On a scale of 1 -10, I'm a 7-8 on the contentment scale.

Don't regret it but I'd like to weigh my boat and see what I'm pushing. I expected more ummph from other postings. And I've had my motor checked 3x. It's not the motor... I use a 14x11x3 prop with a 14x9x3 backup. WOT is 4800 RPMS. 17 kts W/ no ballast, Glass conditions no wind, solo. I don't break 5000 rpms no matter what.
Phat Bote Optimal is 4500 -5500 RPMs

It will be a world of difference from your 25, as it was for me from my former 35. You'll use alot more gas.

Good Luck

[waternwaves]

something wrong here...... 17.2 mph??


fuel, air or prop, speedo, insturments etc......... I would be getting an independent opinion.

what is the prop,
what is the fuel line size, what kind of bulb.
what is the RPM you observe this speed

thanks

[Bobby T.-26X #4767]

I have the White Saltwater 90 HP on a 97X.

While it's nice, there are truths stranger than fiction.

I have not gone over 15kts. With or without ballast. I have bottom paint and a lot of Shtuff. Accept the fact this will never be a speed boat.

something is really, really wrong here...
you need to analyze this more thoroughly. that is "bottom paint & alot of shtuff" does not equal 18mph @ WOT w/ an Etec 90.

Bob T.
"DāBob"
'02X w/ '04 90-TLDI (14" x 11 pitch)
Dinghy Motor: '06 2.5-Suzuki

[Catigale]

Gazm posted this up as a thread sometime back, but we werent able to help out as far as I can remember....

[Gazmn]

I appreciate the interest guys. It's funny in that this always seems to come up around the end of my season.

How would I go about getting an independant opinion?

I use the 14x11x3 Hydrus. Fuel line is an Evinrude "off the shelf" # with an inline bulb. [Regular? ] I did install an oil filter type fuel filter. Would that really make a difference?

I can't seem to get past 4800 RPMs. I'm wondering if the tach is out of "wach".

With glass like, early morning conditions: 4800 RPMs, 14x11 prop. Mast up, I'm not breaking 17kts, nor 4900 RPMs -- even with a 14x9 prop [ 15kts, 48-4900 RPMs] The only time I got 17kts - I didn't have the mast on.

My Evinrude guy doesn't believe the higher kt postings that I quote from here with our size, shape [planing hull] and weight. [No offense intended to anyone.] I just don't know what else to do, so I've come to accept it.

I'm in the bottom part of the Long Island Sound; salt water, I don't know what our altitude is.

[waternwaves]

Does the motor get above 4900 rpm when in neutral in a tank?

I would cross check the rpm with an automotive (HEI) pick up tach (clips on one spark plug and convert the 6 cylinder reading.

Not knowing what your tach is, have your tried GPS speed measurement?

[Gazmn]

I haven't run motor past idle without being in water -- hose clipped in place of course. I didn't know you could do that and run it so high [Duh].

Re: the pick up tach. Please walk me through this conversion. I have a 3 cyl head. I'm assuming I'd multiply the tach reading by 3 ?

While this is going to be a bad weekend for boating for me. I will bring out my handheld car GPS and compare notes and knotts...

[Frank C]

something wrong here...... 17.2 mph??
fuel, air or prop, speedo, insturments etc......... I would be getting an independent opinion.

something is really, really wrong here...
you need to analyze this more thoroughly. that is "bottom paint & alot of shtuff" does not equal 18mph @ WOT w/ an Etec 90.

I will bring out my handheld car GPS and compare notes and knotts...

Ah ha! We so frequently miss the most basic of potential problems . . . Gazmn, just by chance ... is your speed-check from a transom paddlewheel? ... If so I'd guess it isn't calibrated. Also, your "altitude" in saltwater is ALWAYS at sealevel. (at least in the Free world!~ Long Island Sound, for sure!)

GZ, I might be wrong in your case; if so, advance apologies.
Paddlewheels ARE NOTORIOUSLY inaccurate. Don't quote paddlewheel speeds without identifying as such!
Meanwhile, GPS speeds are 99% accuracy guaranteed, but be sure to identify if your display is MPH, or KTS.
But in general, Folks ... a GPS is 'The Standard' for speed testing!

Just by comparison, my Suzi-60, even overproped at 14x12, still gets 21 mph at max 4900.
Your ETEC's max 4900 RPMs is TOO LOW. But even at such lower engine speed you should be getting at least 23 or 24 mph from a 26X with a 90 hp and a 14x11 prop. Hoping that your GPS speed-check might reset this part of the record??? And, FWIW, I'd be nearly as confident with your tachometer readings as with any GPS speed reading. The tach seems the last place I'd test for inaccuracy.

As for engine speed, your ETEC should easily manage max 5500 RPMs with a 14x11 prop. (Leon's ETEC 50 works well with a 14x13 prop.) Why isn't your ETEC getting beyond 4900? Not sure, but I'm suspicious of an ETEC mechanic who can't answer the max RPMs issue.

Didn't one of our OZ-owners also have a problem with a Hi-tech 2-stroker? Who remembers that thread?

[MrBarry]

Didn't one of our OZ-owners also have a problem with a Hi-tech 2-stroker? Who remembers that thread?

Frank, was it this one? ETEC 90: Poor Motoring Performance


ModsNote: Precisely, MrB ... good find~!
Gazmn, Similarities w/ MrBarry's link? ~fc