Search found 1141 matches

by GMAC 76
Thu Apr 19, 2018 11:48 am
Forum: Airboat Talk
Topic: Stupid question maybe?
Replies: 16
Views: 1877

Re: Stupid question maybe?

hey Mark, if ya need wiring harness marked and ready to install, a mag or a mag rebuilt I can help ya out...done a lot of work for guys in your area...just give me a call 863-659-1331 good luck with her!!!
by GMAC 76
Thu Apr 19, 2018 10:54 am
Forum: Aircraft Power Only
Topic: A/C engines converted to run on diesel.
Replies: 3
Views: 788

Re: A/C engines converted to run on diesel.

i would be very concerned about the aircraft cyl seperating with the compression and boost
by GMAC 76
Mon Apr 16, 2018 8:03 pm
Forum: Aircraft Power Only
Topic: lycoming 0360 top end rebuild overhaul?
Replies: 5
Views: 1019

Re: lycoming 0360 top end rebuild overhaul?

Justin Ficken...Apopka......NO QUESTION
by GMAC 76
Thu Apr 12, 2018 2:34 pm
Forum: Aircraft Power Only
Topic: GPU
Replies: 3
Views: 814

Re: GPU

I would think a good way to compare hp to hp would be to compare what you have as far as prop, length ,pitch and wot rpm with a an engine with the same prop...in other words if you find a 260hp with the same prop compare all the above with your prop to see how close they are
by GMAC 76
Thu Apr 05, 2018 8:09 pm
Forum: Aircraft Power Only
Topic: 520 model ID
Replies: 10
Views: 861

Re: 520 model ID

how could it be a true io-520 and have only 250hp when the book on them shows 285 to 300hp ....my friends engine was a 250hp but it is a carbureted 540 Lycoming totally different animal... there is an engine kill lever on the io's on the servo....
by GMAC 76
Thu Apr 05, 2018 3:16 pm
Forum: Aircraft Power Only
Topic: 520 model ID
Replies: 10
Views: 861

Re: 520 model ID

imo it is alot of weight....alot of passengers for a 12' hull for real performance but hey it might do want ya want...ya got a lot of power....I had a buddy who had the same hull and setup with a 540 and it did ok.....he changed it to a single driver rear and a single passenger ...he said it was lik...
by GMAC 76
Thu Apr 05, 2018 12:27 pm
Forum: Aircraft Power Only
Topic: 520 model ID
Replies: 10
Views: 861

Re: 520 model ID

imo....with that kind of true hp on that hull with the right prop you would be very happy....especially if the rigging and all metal work were done right
by GMAC 76
Wed Apr 04, 2018 9:51 pm
Forum: Aircraft Power Only
Topic: Srnenich 72"h series prop
Replies: 4
Views: 796

Re: Srnenich 72

one of the sensenich reps told me that the orginal reason for the development of the h series was for racng and trying to compete with the warp drives when they first came out...they spooled up quick and had great top end for raccing but not much push for the hill...I dont know but im sure some one ...
by GMAC 76
Wed Apr 04, 2018 10:15 am
Forum: Aircraft Power Only
Topic: 520 model ID
Replies: 10
Views: 861

Re: 520 model ID

my papers show the io-520 a,b,d,f,j,k,l,m engines are rated at 285-300hp.......the tiso and gtiso engines are rated at 285-375 hp
by GMAC 76
Tue Apr 03, 2018 7:08 pm
Forum: Aircraft Power Only
Topic: 520 model ID
Replies: 10
Views: 861

Re: 520 model ID

cont plates are usually found in the middle on the top side of the engine case.....fyi all 520's were fuel injected
by GMAC 76
Fri Mar 30, 2018 8:34 pm
Forum: Aircraft Power Only
Topic: Tuning an o470?
Replies: 8
Views: 783

Re: Tuning an o470?

sounds like an idle screw adjustment to lean the mixture is needed and maybe a small increase in idle rpm will help so it don't load up at an idle...those engines are not real efficient at an idle when there cold that is why the airplane guys always warm'em up at a higher rpm than operating temp idl...
by GMAC 76
Fri Mar 30, 2018 7:43 pm
Forum: Aircraft Power Only
Topic: Tuning an o470?
Replies: 8
Views: 783

Re: Tuning an o470?

if I remember right your engine WAS fuel injected av i0-470 so there is no truly matched carb ever built for that engine...so I built a carb for an oem 0-470 carbureted engine which is as close as I could get...you asked if there was any other tuning options for your setup....... yea there is ...the...
by GMAC 76
Fri Mar 30, 2018 6:17 pm
Forum: Aircraft Power Only
Topic: Tuning an o470?
Replies: 8
Views: 783

Re: Tuning an o470?

Economizer....specially if the carb is not a part number match for the engine its on or the carb has been modified internally...like a drilled out nozzle or wrong jet #
by GMAC 76
Sat Mar 24, 2018 2:23 pm
Forum: Aircraft Power Only
Topic: Running with low oil pressure question
Replies: 6
Views: 947

Re: Running with low oil pressure question

rutland wrote:WHAT DO YOU CONSIDER THE CORRECT OIL PRESSURE ON A 540
Lycoming overhaul manual says normal at operating temp 75-85 at cruise...... 25 at idle on all their engines
by GMAC 76
Thu Mar 22, 2018 6:27 pm
Forum: Aircraft Power Only
Topic: fastest 0360
Replies: 3
Views: 1141

Re: fastest 0360

fastest 4cyl I ever seen was the "BAD WHAMMER JAMMER"...I know a lot of rank 6cyl boats that wanted no part of that one.....
by GMAC 76
Wed Mar 21, 2018 11:56 am
Forum: Aircraft Power Only
Topic: seal behind flywheel came out
Replies: 12
Views: 1299

Re: seal behind flywheel came out

That was a concern. It did not look like it had any adhesive on it before so I did not use any. I did put the split on the top. I don't see any sign of it having a plate that bolts on to help hold it inn place but I'm going to look again to see if that is a possibility. I have a 3m adhesive that I ...
by GMAC 76
Tue Mar 20, 2018 7:24 pm
Forum: Aircraft Power Only
Topic: seal behind flywheel came out
Replies: 12
Views: 1299

Re: seal behind flywheel came out

Ok guys. I pulled apart today and it was a split seal with the spring. It did not look messed up so I put it back in and put the spring together and back in. However the seal went inn fairly easy. Is this normal???? Gmac 76?? what type of ahdhesive did ya use around the out side of the seal.....it ...
by GMAC 76
Sat Mar 17, 2018 8:16 pm
Forum: Aircraft Power Only
Topic: Running with low oil pressure question
Replies: 6
Views: 947

Re: Running with low oil pressure question

guess the question is.....why would ya want to even take a chance if you could fix the problem with a washer or a $40 spring and take 2 minutes to put em in
by GMAC 76
Sat Mar 17, 2018 11:16 am
Forum: Aircraft Power Only
Topic: Running with low oil pressure question
Replies: 6
Views: 947

Re: Running with low oil pressure question

what oil lines are the wrong size....sounds like ya need a new pressure spring or a couple of shims behind the old one....40-50 at operating temp is a bit low for the 540 but not way low
by GMAC 76
Sat Mar 17, 2018 10:15 am
Forum: Aircraft Power Only
Topic: seal behind flywheel came out
Replies: 12
Views: 1299

Re: seal behind flywheel came out

the old one was solid...had to have a special tool and heat to install it....this one was split
by GMAC 76
Fri Mar 16, 2018 9:35 pm
Forum: Aircraft Power Only
Topic: seal behind flywheel came out
Replies: 12
Views: 1299

Re: seal behind flywheel came out

I picked mine up at preferred airparts...aircraft spruce has them also...but I bet any good engine builder here in fla has them....the part number is I think is LW11997 CRANKSHAFT OIL SEAL with impregnated spring but double check....they are not cheap but worth every penny...I believe mine was about...
by GMAC 76
Thu Mar 15, 2018 10:33 am
Forum: Aircraft Power Only
Topic: seal behind flywheel came out
Replies: 12
Views: 1299

Re: seal behind flywheel came out

yes....they have a new style seal now with magic fingers embedded in the seal so ya don't have to fight that damn little tension spring...I put one in my 200 9 yrs ago and still dry
by GMAC 76
Thu Mar 08, 2018 10:31 am
Forum: Aircraft Power Only
Topic: Update overheat and detonation ! Thank you!!!
Replies: 6
Views: 863

Re: Update overheat and detonation ! Thank you!!!

Gary S wrote:Your asking a lot from that motor. Do it a favor and don't mix the gas. our already going to the airport to get fuel. Run good fuel and it will be one more thing you don't have to worry about.
X2
by GMAC 76
Sun Mar 04, 2018 11:15 pm
Forum: Aircraft Power Only
Topic: 0360 id
Replies: 5
Views: 618

Re: 0360 id

I change my oil and add lucas oil stabilizer every 15-20 hrs and check and clean the oil screen cause after all that is the oil filter on your engine unless a remote filter has been installed....if it was me and I didn't know when the last time the screen was cleaned and it did have some sparkle in ...
by GMAC 76
Wed Feb 28, 2018 1:52 pm
Forum: Aircraft Power Only
Topic: 0360 id
Replies: 5
Views: 618

Re: 0360 id

the easiest and most accurate way to find what the timing is set at in degrees btdc would be with an aircraft timing wheel and magneto timing/syncro light...I know there are a lot of different ways to figure out ABOUT where the timing is but this is what I use....if and only if your flywheel is inst...

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