Which is Worse for my Motor? - If I had to choose...

[dazk14]

Re: Which is Worse for my Motor? - If I had to choose...

" I'm not a noob to boating, nor to properly sizing propellers,..."

Don't sell yourself short, you are an incredible noob to properly sizing propellers.

If you weren't, you would have never stated that the prop was "oversized" when in reality it is undersized by industry standards and nomenclature.

Running an oversized 24" pitch prop on a rig designed for an 11" pitch prop can easily cause pre-ignition/detonation that would grenade a powerhead in under 20 minutes.

The basic question is reasonable, but the game playing with intelligent requests for plainly obvious NEEDED data is non-sense and a waste of forum members time.

 

[1946Zephyr]

Re: Which is Worse for my Motor? - If I had to choose...

I respectfully disagree. Larger HP motors dont leave the factory with props on them because the type / size of boat that it is going to be installed on has not yet been determined. It's the responsibility of the installer to choose the appropriate prop for the application in order to reach the desired WOT RPM range. I can buy a BRP / OMC 21 pitch prop and it will fit right on to my 110 V4 but since my boat is on the heavier side with a less that efficient hull design, I'm only going to get 4000 rpms out of it which will hurt the motor over time...As a very temporary emergency spare, I'm sure it would be okay to use it.

Okay, I gotcha. So you want to match a prop up, once you get the motor mounted on the boat and one that will allow the motor to run at the ideal RPM's at WOT. That makes sense. Don't want to over rev your motor or lug it.

 

[ShapeShifter]

Re: Which is Worse for my Motor? - If I had to choose...

+1 ^
I think that because this was mis-posted in Engine repair and Maintenance instead of SHT, it fooled him into thinking that this was a serious thread.
When an OP starts by stating that he does not want honest responses, it is bound to go downhill from there....:facepalm:



1) The correct forum section. This one is titled "Repair and Maintenance questions".
2) A poll might have been a better option.
3) Dockside Chat or Stupid human tricks would have been equally good choices....maybe even Non-repair Outboard Discussions or Prop questions and Topics.
4) At this point I'd be curious whether you own a Mercury O/B, but you might not see either the intended humour, irony, or relevance of the question.


This is a very helpful and usually civil forum, but you usually get back the attitude that you exhibit.
IMO you have perhaps not been as "uncondescending" as you may have thought.

Agreed. Sometimes my rapier wit is mistaken, in text, for condecention. C'mon man, that rubber-band bit was funny .

I posted this in the wrong forum. My OP should have been read as though friends were sitting at a bar talking about boats.....perhaps even the bar at a yacht club. Now an innocuous conversation has turned into a troll-fest.

Tim Frank is right. A poll would have been better.

Moderators, please kill this discussion, or move it to the forum of your choice.

.

 

[boobie]

Re: Which is Worse for my Motor? - If I had to choose...

Same old story, try to help a guy and he "JUST WON'T LISTEN". Proves his head is buried somewhere. Wonder where????????????

 

[archcycle]

Re: Which is Worse for my Motor? - If I had to choose...

so please dont reply with that nautical wisdom.

Quote from the original post. Serious answers based on members' nautical wisdom are not welcome. But you don't welcome our rantings either. I don't know what you Want from us! :facepalm:

 

[Fl_Richard]

Re: Which is Worse for my Motor? - If I had to choose...

I say any prop is better than no prop

 

[Tim Frank]

Re: Which is Worse for my Motor? - If I had to choose...

Agreed. Sometimes my rapier wit is mistaken, in text, for condecention. C'mon man, that rubber-band bit was funny .

OK, if you say so...

I posted this in the wrong forum. My OP should have been read as though friends were sitting at a bar talking about boats.....perhaps even the bar at a yacht club. Now an innocuous conversation has turned into a troll-fest.

If your OP was not read as you had intended, it is not necessarily the fault of the readers.:facepalm:
I wouldn't categorise even one of the responders in here as Trolls....all regulars,all trying to help; you'll be grateful for their opinions and experience if you post a real repair issue in this area....and they don't hold grudges.

Tim Frank is right.
.

Can you send that to my wife...??

A poll would have been better.

Good chance.

Moderators, please kill this discussion, or move it to the forum of your choice.

You can request that more directly by clicking on the little triangular shape in the lower left corner. I think you have a good idea in moving it....the right venue will likely change the tone.

And you never did note what brand of O/B you own....

(and a belated WELCOME ABOARD...)

 

[dazk14]

Re: Which is Worse for my Motor? - If I had to choose...

Quote Originally Posted by ShapeShifter
"Agreed. Sometimes my rapier wit is mistaken, in text, for condecention."

I know I didn't take it that way.

I just took it as a little knowledge is dangerous, an occasionally torturous...

 

[ShapeShifter]

Re: Which is Worse for my Motor? - If I had to choose...

Okay picture this.........a giant rubber band stretched from the bow back to the prop........ ya with me....? ...... What..?

Someone once said "a picture is worth a thousand words" so I posted one back before the shenanigans began.

Motor = 1997 Evinrude 70 hp E70TLEUM
Service prop (damaged) = 13.2x17
Spare prop = 14x19
Hull = Glastron V156 Aqualift II 850lbs dry.
Pull tube = ridiculous
Skipper = 200lbs
Pre-teen snotfaces on board = 2
MILF on board = 1
Beer = (not allowed on lake *&%%#@)
Ice = minimal
food = half bag of Cheesy Poofs
Fuel = 10gal +/-
Bilge = dry
Wallet = empty

Again, this was not supposed to turn in to a "prop discussion" but now that all my data is laid bare, what the heck, let?s make use of the thread so we can stay true to the forum intent.

 

[boobie]

Re: Which is Worse for my Motor? - If I had to choose...

If you would have posted this at the start of your thread it would have saved the pissing contests and all of us Trolls could have gave you better answers. And no, we're not narcissistic. Just a bunch of guys with a LOT of experience.

 

[soundchaser]

Re: Which is Worse for my Motor? - If I had to choose...

Burp..............

 

[ShapeShifter]

Re: Which is Worse for my Motor? - If I had to choose...

boobie,


nevermind.

 

[1946Zephyr]

Re: Which is Worse for my Motor? - If I had to choose...

And that my friends was my entertainment for the week. I think I'll have another beer

 

[fireman57]

Re: Which is Worse for my Motor? - If I had to choose...

I guess shapeshifter was making another middle class attempt at humor. Anyone here hang out at the bar at the yacht club? 18 posts and most of them on this thread trying to convince us that he is comedian. This thread is closed for me.

 

[1946Zephyr]

Re: Which is Worse for my Motor? - If I had to choose...

I don't know, I thought it was pretty funny with all the things listed.

Motor = 1997 Evinrude 70 hp E70TLEUM
Service prop (damaged) = 13.2x17
Spare prop = 14x19
Hull = Glastron V156 Aqualift II 850lbs dry.
Pull tube = ridiculous
Skipper = 200lbs
Pre-teen snotfaces on board = 2
MILF on board = 1
Beer = (not allowed on lake *&%%#@)
Ice = minimal
food = half bag of Cheesy Poofs
Fuel = 10gal +/-
Bilge = dry
Wallet = empty

Some of these got me laughing pretty good. And yes, sometimes the boat issues can make our wallet empty. By the way fireman57, what's burning in your avitar? Is that your hat, or your piano?

 

[fireman57]

Re: Which is Worse for my Motor? - If I had to choose...

That my friend is a piano. No one wanted it so we set the veneer on fire, drank beer, and played it until it literally was too hot to touch. I do agree the list was pretty good and if he needs real help everyone will still be here for him.

 

[1946Zephyr]

Re: Which is Worse for my Motor? - If I had to choose...

Way too funny. Sounds like something I would try. LOL.

I'm kinda surprised that the moderators didn't close this thread a while back.

 

[Silvertip]

Re: Which is Worse for my Motor? - If I had to choose...

The way I see it, if the prop fits on the motor and it was made for the motor, then it should be okay to use. Do you think that the company that built the outboard would have built a prop that would harm a motor? I wouldn't believe so. So, if the shoe fits, wear it. LOL

That is a very wrong understanding of props. If there was only one suitable prop for a given motor then that's all that would be offered. Unlike a car or truck, a boat only has one gear and that gear and the prop attached to the output shaft has to get you out of the hole, cruise comfortably and allow the engine to operate at or very near the top of the manufacturers recommended WOT rpm band. More than that the engine over revs. Under that and the engine is lugging. A work boat or pontoon requires a very different prop than a light weight "V" hull. Hence the various props that are available. Props are generally sized both in diameter and pitch for the size gearcase an engine has. Small motors have small gearcases. Medium size motors (such as 75-90-115) have medium gear cases and large engines have large gearcases. Hub size is critical to performance since that's where the exhaust exits so the only thing correct in your assessment is that the prop must fit the particular gear case.