O-470-11 help

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aluminumwelder0073
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O-470-11 help

Post by aluminumwelder0073 » Thu Mar 31, 2016 9:27 pm

first time on the site and trying to buy my first boat. I am looking at a O-470-11 boat. I would like some info on what the oil pressure should be at idle and hot. Any other info would be a great help.
thanks

jeepinocala1111
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Re: O-470-11 help

Post by jeepinocala1111 » Thu Mar 31, 2016 9:44 pm

aluminumwelder0073 wrote:first time on the site and trying to buy my first boat. I am looking at a O-470-11 boat. I would like some info on what the oil pressure should be at idle and hot. Any other info would be a great help.
thanks
Just give your location and possibly someone from the forum with a lot of time with that engine will help you out.

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lilly-Pad
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Re: O-470-11 help

Post by lilly-Pad » Thu Mar 31, 2016 10:28 pm

jeepinocala1111 wrote:
aluminumwelder0073 wrote:first time on the site and trying to buy my first boat. I am looking at a O-470-11 boat. I would like some info on what the oil pressure should be at idle and hot. Any other info would be a great help.
thanks
Just give your location and possibly someone from the forum with a lot of time with that engine will help you out.
2X Welcome to SA :cheers:
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Best laid plans of mice and men, wont always get you laid.............

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Re: O-470-11 help

Post by aluminumwelder0073 » Thu Mar 31, 2016 10:29 pm

I live in Okeechobee

dshaw94
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Re: O-470-11 help

Post by dshaw94 » Fri Apr 01, 2016 12:41 am

I believe the book calls for a min of 13 pounds, hot at idle.
We all got it coming, kid. (William Money)

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kwanjangnihm
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Re: O-470-11 help

Post by kwanjangnihm » Fri Apr 01, 2016 6:53 am

Here are a few tips:
1. Take an experienced airboat person with you to check it out.
2. Take the boat out and run it for over an hour to check temps, oil pressure, tach, vibrations, etc.
3. If it passes these tests, take it to a qualified aircraft mechanic and have a leak down check done and a good once over on the engine, carb & mags.

Even if #3 costs you a couple hundred bucks, its worth it in the long run. Airboats are money pits!! You pay to have fun. :toothy7:

Good luck and welcome to SA. :rebel:
" I don't care who you are back in the world, you give away our position one more time, I'll bleed ya, real quiet. Leave ya here. Got that? "

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Re: O-470-11 help

Post by aluminumwelder0073 » Fri Apr 01, 2016 7:18 am

Thanks for the help and for the welcome to SA. I will post an update when the deal is done.

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Re: O-470-11 help

Post by jeepinocala1111 » Fri Apr 01, 2016 7:29 am

aluminumwelder0073 wrote:Thanks for the help and for the welcome to SA. I will post an update when the deal is done.
I would not get it if the oil pressure is lower then 40 cold or lower then 40 hot that sounds too low Mine is 55 to 60 cold 45 to 55 hot. And I think that is kinda low.

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Re: O-470-11 help

Post by aluminumwelder0073 » Fri Apr 01, 2016 7:42 am

Thanks jeep has your 11 been a reliable engine for you. I heard some low rumble about it's reliability.

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Re: O-470-11 help

Post by aluminumwelder0073 » Fri Apr 01, 2016 8:35 am

Anyone else have a 470-11 that mite have a few tips on that engine.I just don't want to get burnt on this.I have read enough horrible stories I don't want to live one.

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JT540
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Re: O-470-11 help

Post by JT540 » Fri Apr 01, 2016 10:37 am

they don't need that high of oil pressure. min 20 is good for a continental hot idle. you will see some engines that are running as low as 10 psi at ide and still fine. some of the old e- series are most notorious for that. look up engine specs online and you can find almost anything you need to know. google is the best tool you have if you use it.
"THE MORE I LEARN ABOUT WOMEN THE MORE I LOVE MY AIRBOAT"

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Re: O-470-11 help

Post by jeepinocala1111 » Fri Apr 01, 2016 10:48 am

aluminumwelder0073 wrote:Thanks jeep has your 11 been a reliable engine for you. I heard some low rumble about it's reliability.
I have a gpu but 20 psi oil pressure seems way too low. The -11 I have been told to stay away from.

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kwanjangnihm
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Re: O-470-11 help

Post by kwanjangnihm » Fri Apr 01, 2016 11:10 am

http://www.southernairboat.com/pdf/airc ... ental/470/

the O-470-11 is listed here - open the pdf and it has oil pressure and operating temps

:rebel:
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Re: O-470-11 help

Post by jeepinocala1111 » Fri Apr 01, 2016 11:52 am

kwanjangnihm wrote:http://www.southernairboat.com/pdf/airc ... ental/470/

the O-470-11 is listed here - open the pdf and it has oil pressure and operating temps

:rebel:
I am VERY surprised oil pressure at idle shall be at least 10 psi at idle and oil pressure shall be 40-75 psi at speed above 1500 rpm.

You could never get me to buy any engine with oil pressure at 10 psi at idle is this will all 0470 engines?

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Re: O-470-11 help

Post by Planeguy » Fri Apr 01, 2016 9:08 pm

I thought the 10 psi sounded low too but it is what the manual says. The odd thing for me is the document used to certify the O-470-11 for aircraft shows 30-60 psi with no note for a lower hot idle while the 470's that have a letter behind them do have the 10 psi note.

http://rgl.faa.gov/Regulatory_and_Guida ... v%2016.pdf

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Re: O-470-11 help

Post by jeepinocala1111 » Fri Apr 01, 2016 9:22 pm

Planeguy wrote:I thought the 10 psi sounded low too but it is what the manual says. The odd thing for me is the document used to certify the O-470-11 for aircraft shows 30-60 psi with no note for a lower hot idle while the 470's that have a letter behind them do have the 10 psi note.

http://rgl.faa.gov/Regulatory_and_Guida ... v%2016.pdf
A good friend of mine is a certified ac mechanic this must be why he told me to stay away from certain engines. I wonder what the tear down inspection time on one of these engine is when in a plane?

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Planeguy
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Re: O-470-11 help

Post by Planeguy » Fri Apr 01, 2016 9:40 pm

I don't have any experience with the 470 but based on this document I would guess it is recommended at 1500 hours.

http://www.tcmlink.com/pdf2/SIL98-9E.pdf

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Bruce
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Re: O-470-11 help

Post by Bruce » Fri Apr 01, 2016 11:06 pm

if its got around 20-25 psi at idle hot its good to go
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Re: O-470-11 help

Post by dshaw94 » Mon Apr 04, 2016 6:38 am

Whats the deal with folks giving there opinions to questions like " what's exceptionable oil pressure for an o-470-11"!!

The answer to the question is what the manufacturer "TCM" Says it is! Not your uneducated professional opinion about how much oil pressure a motor would need for you to buy it or what your AP buddy told yeah once.

When you start engineering, warranting, and federally certifying engines for flight the you can dictate the proper oil pressure parameters for that engine. Until then lets stick to the manufacturer specifications.
We all got it coming, kid. (William Money)

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Planeguy
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Re: O-470-11 help

Post by Planeguy » Tue Apr 05, 2016 9:24 pm

dshaw94 wrote:Whats the deal with folks giving there opinions to questions like " what's exceptionable oil pressure for an o-470-11"!!

The answer to the question is what the manufacturer "TCM" Says it is! Not your uneducated professional opinion about how much oil pressure a motor would need for you to buy it or what your AP buddy told yeah once.

When you start engineering, warranting, and federally certifying engines for flight the you can dictate the proper oil pressure parameters for that engine. Until then lets stick to the manufacturer specifications.
Which specs do you use? The numbers in the Army's overhaul manual from 1960 or the numbers in the Type Certificate from 2011? They both come from TCM.

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Re: O-470-11 help

Post by BANANA BOAT » Wed May 18, 2016 8:59 am

Did you buy it?
I have a, -11
I have figured out how to make mine have good oil pressure and never tap

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Re: O-470-11 help

Post by chucky7 » Wed May 18, 2016 2:14 pm

how did you make it have good oil pressure? I just bought one and it seems to be leaking a little oil from the push tubes, i went through 3 quarts sunday

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jopete
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Re: O-470-11 help

Post by jopete » Wed May 18, 2016 10:12 pm

throw some lucas oil stabilizer and lucas oil stop leak in that beech and roll it. that's what i do.

overthinking things used to stop me from enjoying my airboat. now i fix the big things and enjoy the ride.


good luck.

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Re: O-470-11 help

Post by Seminole Red » Thu May 19, 2016 10:15 am

My O-470 has about 65 hours on a fresh build. I am using 9 quarts of Phillips Aviation 20W-50 oil. My pressure is around 60 psi cold and 40 psi hot. I am not an expert by no means, just doing what Lacey Everett told me to do.
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Re: O-470-11 help

Post by BANANA BOAT » Tue May 16, 2017 2:42 pm

do no fill it up all the way.
I only put in 7

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