Search found 1160 matches

by GMAC 76
Mon Feb 04, 2019 9:35 pm
Forum: Aircraft Power Only
Topic: 520 Continental rebuild
Replies: 127
Views: 10208

Re: 520 Continental rebuild

The carb was an MA-4-5.......10-4404....OEM 0-540 260HP engine....there is no bigger stock jet than the 47-779 that is in that carburetor that I am aware of.....it is essential that the l/r lever be in the full rich position at all times...and an adjustment of the economizer may help...I seem to hav...
by GMAC 76
Mon Feb 04, 2019 11:24 am
Forum: Aircraft Power Only
Topic: Impulse coupling
Replies: 4
Views: 464

Re: Impulse coupling

ok im headed out to the shop....I know I have the housing and the spring....will check the numbers and see if I have the cam and what degree it is....if I got it all I can ship it to ya today....I will let ya know shortly.........................yep got exactly what ya need with a 45 degree riveted ...
by GMAC 76
Sun Feb 03, 2019 9:12 pm
Forum: Aircraft Power Only
Topic: Impulse coupling
Replies: 4
Views: 464

Re: Impulse coupling

do ya need the whole impulse assembly? (housing, spring and cam)........what degree lag do ya want on the cam?
by GMAC 76
Mon Jan 21, 2019 9:45 am
Forum: Aircraft Power Only
Topic: This is an O290 GPU , yes?
Replies: 4
Views: 673

Re: This is an O290 GPU , yes?

GMAC, mine was a question. Not as experienced as many, I’m searching for the proper answer. I’d love affirmation that my assertion was accurate. But if my guess is incorrect, correction is greatly appreciated. oh I totally understand your questioning I was just curious as to if there was something ...
by GMAC 76
Sun Jan 20, 2019 8:24 pm
Forum: Aircraft Power Only
Topic: This is an O290 GPU , yes?
Replies: 4
Views: 673

Re: This is an O290 GPU , yes?

what exactly on the engine makes ya think it is a GPU and not an aircraft flight engine?
by GMAC 76
Sun Jan 13, 2019 3:49 pm
Forum: Aircraft Power Only
Topic: Who works on mags around groveland fl need Bendix 20 series worked on
Replies: 13
Views: 1219

Re: Who works on mags around groveland fl need Bendix 20 series worked on

complete overhaul using new parts, bench test, mounting gaskets and shipping is $185 per mag and you get all your old parts back....the only additional charge would be if the coil needs replaced but that seldom happens if ya have the bendix red hi output coils
by GMAC 76
Sun Jan 13, 2019 2:11 pm
Forum: Aircraft Power Only
Topic: Who works on mags around groveland fl need Bendix 20 series worked on
Replies: 13
Views: 1219

Re: Who works on mags around groveland fl need Bendix 20 series worked on

Underpowered83 wrote:Could I possibly ship them to you or do you do such?
hell ya....do that all the time.....turnaround time right now is about 5-6 days as I am swamped with mag and carb work right now but if ya want to ship em to me ......greg mccloud.....4 Henderson rd.....lake placid fl 33852
by GMAC 76
Sat Jan 12, 2019 3:40 pm
Forum: Aircraft Power Only
Topic: Who works on mags around groveland fl need Bendix 20 series worked on
Replies: 13
Views: 1219

Re: Who works on mags around groveland fl need Bendix 20 series worked on

I build and rebuild Bendix mags but maybe a little to far away from ya in lake placid.....
by GMAC 76
Fri Dec 28, 2018 10:37 am
Forum: Aircraft Power Only
Topic: carburetor
Replies: 18
Views: 1782

Re: carburetor

Billykid wrote:what is max fuel pressure for M4-5
3-5 psi
by GMAC 76
Sun Dec 23, 2018 7:15 pm
Forum: Airboat Talk
Topic: Lookin For 18mm spark plug helicoil
Replies: 4
Views: 522

Re: Lookin For 18mm spark plug helicoil

I got the coils if ya want me to send ya a couple for Bobs install tool
by GMAC 76
Mon Nov 26, 2018 11:10 am
Forum: Aircraft Power Only
Topic: Timing pros an cons
Replies: 14
Views: 1824

Re: Timing pros an cons

try 20 degrees....might not affect the low end push but maybe help the top end
by GMAC 76
Fri Nov 23, 2018 9:41 am
Forum: Airboat Tech
Topic: Line X on full deck
Replies: 7
Views: 1030

Re: Line X on full deck

I know it is not quite the same but a buddy had the inside of his 15' glass hull Line-X in light gray...he loved the finished product but does have some concerens now about the added weight which he said is noticeable
by GMAC 76
Tue Nov 20, 2018 8:47 pm
Forum: Aircraft Power Only
Topic: Lycoming 320 starting procedure
Replies: 27
Views: 3549

Re: Lycoming 320 starting procedure

FACET GOLD FLOW....3-5 PSI....34 GPH
by GMAC 76
Mon Nov 19, 2018 9:58 pm
Forum: Aircraft Power Only
Topic: 220 won't idle ?
Replies: 19
Views: 2137

Re: 220 won't idle ?

jopete wrote:
the idle screws fit loose, I bet when I change them out and the seats it will fix it, at least that's what I am thinking.
those little seals are what keeps the screws in place and seals the needle when ya find that sweet spot....I think your on the right track man....good luck
by GMAC 76
Mon Nov 19, 2018 9:03 pm
Forum: Aircraft Power Only
Topic: 220 won't idle ?
Replies: 19
Views: 2137

Re: 220 won't idle ?

check to make sure that the idle screws still have the little cork seal around them...if they are gone it can make a constant good idle hard to set....the renew kit will have them in it ....just a thought
by GMAC 76
Wed Nov 07, 2018 9:54 am
Forum: Aircraft Power Only
Topic: timing mags/ snapping the impulse coupling
Replies: 19
Views: 1810

Re: timing mags/ snapping the impulse coupling

the 0-435 Lycoming aircraft engine was used in an M22 LOCUST TANK ...developed in 1941.....not real sure when Mr. Frankenstein showed up but he is alive and well in the airboat world as is evident by this entire thread......lol
by GMAC 76
Mon Nov 05, 2018 9:42 pm
Forum: Aircraft Power Only
Topic: timing mags/ snapping the impulse coupling
Replies: 19
Views: 1810

Re: timing mags/ snapping the impulse coupling

I think some of the 0-435 engines were actually used in tanks which would be a whole different ballgame I would think....this is a military numbered carb so I wonder if it was on a tank engine instead of an airplane engine....maybe someone else has that info cause it is certainly an oddball number t...
by GMAC 76
Mon Nov 05, 2018 8:24 pm
Forum: Aircraft Power Only
Topic: timing mags/ snapping the impulse coupling
Replies: 19
Views: 1810

Re: timing mags/ snapping the impulse coupling

that is possible but the carb itself should be ok cause it is a 4-5 with the #187 throttle bore but the jet/nozzle may need to be bigger and the economizer tweeked...im thinking an 0-470 jet and richen the economizer just a little but damn if it run a g0-480 it should run yours...if it was me I woul...
by GMAC 76
Mon Nov 05, 2018 11:20 am
Forum: Aircraft Power Only
Topic: timing mags/ snapping the impulse coupling
Replies: 19
Views: 1810

Re: timing mags/ snapping the impulse coupling

if it run a go-480 without heating up then I would bet it is all right for your 435.....I was just thinking that there are several 4-5 carbs that would bolt right up but would not be enough for the 435 but if ya got a number that will tell ya what engine that carb is for and then there will be no qu...
by GMAC 76
Sun Nov 04, 2018 10:00 am
Forum: Aircraft Power Only
Topic: timing mags/ snapping the impulse coupling
Replies: 19
Views: 1810

Re: timing mags/ snapping the impulse coupling

I have found that when ya start frankeinsting engines with different cyls, cams, compression ratios, carburetors etc that a slight retard in timing helps in several ways...I have my modified 0-360 set at 22 degress btdc and it preforms much better,runs cooler and starts better than at 25 degrees...b...
by GMAC 76
Thu Oct 25, 2018 9:47 am
Forum: Aircraft Power Only
Topic: Continental overhaul
Replies: 9
Views: 1277

Re: Continental overhaul

flcracker9 wrote:Another guy that comes highly recommended and great to deal with, Justin Ficken 407-509-4383
X2 ON JUSTIN
by GMAC 76
Sun Oct 21, 2018 10:36 am
Forum: Aircraft Power Only
Topic: 520 rich/misfire?
Replies: 10
Views: 1150

Re: 520 rich/misfire?

what is the 10-???? part number on the tag?
by GMAC 76
Thu Oct 18, 2018 3:21 pm
Forum: Aircraft Power Only
Topic: 520 rich/misfire?
Replies: 10
Views: 1150

Re: 520 rich/misfire?

if and only if the carb is a MA-6AA helicopter carb and has not been converted or modified.....I had a very similar problem with an 0-540 and a 6AA carb last week and what had happened was the AMC unit had failed and was dumping unjetted fuel into the main nozzle
by GMAC 76
Wed Oct 17, 2018 10:13 am
Forum: Aircraft Power Only
Topic: 0470 b spark plug wires
Replies: 2
Views: 948

Re: 0470 b spark plug wires

MESSAGE SENT......THANKS BUSHHOG85
by GMAC 76
Sun Oct 07, 2018 10:23 am
Forum: Aircraft Power Only
Topic: carburetor
Replies: 18
Views: 1782

Re: carburetor

all MA-4-5 carbs are float carbs

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