Search found 1132 matches

by GMAC 76
Mon Jan 21, 2019 9:45 am
Forum: Aircraft Power Only
Topic: This is an O290 GPU , yes?
Replies: 4
Views: 439

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: 439

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: 741

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: 741

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: 741

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: 1289

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: 356

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: 1364

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: 785

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: 2537

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: 1571

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: 1571

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: 1271

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: 1271

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: 1271

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: 1271

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: 1271

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: 760

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: 831

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: 831

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: 790

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: 1289

Re: carburetor

all MA-4-5 carbs are float carbs
by GMAC 76
Sat Oct 06, 2018 9:53 am
Forum: Aircraft Power Only
Topic: carburetor
Replies: 18
Views: 1289

Re: carburetor

CGstamp wrote:GMAC 76 is there some place we can be more secure

you bet I will send ya a message
by GMAC 76
Thu Oct 04, 2018 8:25 am
Forum: Aircraft Power Only
Topic: carburetor
Replies: 18
Views: 1289

Re: carburetor

those carbs are not to my knowledge used much in the airboat world.....however they are popular sell items on e-bay for collectors and home builders and guys who restore old engines and planes .....shipping is included in the price on all my carbs ....... but if ya come pick it up I knock $15 off th...
by GMAC 76
Wed Oct 03, 2018 10:32 am
Forum: Aircraft Power Only
Topic: carburetor
Replies: 18
Views: 1289

Re: carburetor

yes sir it will bolt right up and run your engine just fine, probably better than the old stromburg.....all my MA-4-5 carbs are completely rebuilt using FAA/PMA approved parts, bench tested and include new mounting gaskets and shipping $600....I have one left now it is a 10-3965-12 OEM on the 0-470 ...

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