Search found 1142 matches

by GMAC 76
Wed Jan 17, 2018 4:58 pm
Forum: Aircraft Power Only
Topic: Sticky valves
Replies: 21
Views: 2066

Re: Sticky valves

I agree with swamphunter45....a good dose of seafoam in the gas will sure help....it is a great old school upper cyl lubricant
by GMAC 76
Wed Jan 17, 2018 12:08 pm
Forum: Aircraft Power Only
Topic: 0470-13 help
Replies: 11
Views: 1682

Re: 0470-13 help

dimotta wrote:What you have in mind
message sent
by GMAC 76
Tue Jan 16, 2018 7:17 pm
Forum: Aircraft Power Only
Topic: 0470-13 help
Replies: 11
Views: 1682

Re: 0470-13 help

deno is absouletly correct...the 6AA HELICOPTER IS A 277 bore for the 540 engines...you need an MA-4-5 with the 187 bore or a 5AA helicopter carb for your 470...I have afresh rebuilt bench tested 5AA converted to a 4-5 for the 470 if ya wanna do some dealing for the 6AA
by GMAC 76
Thu Jan 11, 2018 8:47 pm
Forum: Aircraft Power Only
Topic: need help 0520 carb set up
Replies: 21
Views: 1807

Re: need help 0520 carb set up

there ya go!!!!......gary barber on SA facebook has some 540 carbs that are take offs...might give him a try...they are getting harder to find...good luck
by GMAC 76
Wed Jan 10, 2018 10:26 am
Forum: Aircraft Power Only
Topic: need help 0520 carb set up
Replies: 21
Views: 1807

Re: need help 0520 carb set up

the 4893 is a 470 carb with the 187 throttle bore while it will run the 520 it is not the right carb for that engine...the 520's were all fuel injected and when changed over to carburation the best carb for them is a 540 carb or a 6AA helicopter carb with the larger 277 throttle bore....im sure you ...
by GMAC 76
Thu Jan 04, 2018 10:04 am
Forum: Airboat Tech
Topic: 0290D Lycoming Coversion from Generator to Alternator
Replies: 6
Views: 772

Re: 0290D Lycoming Coversion from Generator to Alternator

classic's mount is about $100 I think
by GMAC 76
Wed Dec 27, 2017 8:03 pm
Forum: Airboat Tech
Topic: 0290D Lycoming Coversion from Generator to Alternator
Replies: 6
Views: 772

Re: 0290D Lycoming Coversion from Generator to Alternator

classic airboats in cocoa makes a nice motor mount/alternator bracket for the 4 cyl lyc using the delco one wire alt
by GMAC 76
Fri Nov 24, 2017 8:20 pm
Forum: Aircraft Power Only
Topic: Carburetor help
Replies: 3
Views: 621

Re: Carburetor help

It is borderline high psi.....3-5 would be best....but if the float/needle/seat assy are in good condition it may work.....I bench test all my carbs at 7psi at the inlet to insure that assy is working right then recommend a 3-5 psi fuel pump
by GMAC 76
Wed Nov 22, 2017 11:47 am
Forum: Airboat Talk
Topic: Breather tube
Replies: 14
Views: 1913

Re: Breather tube

just remember one thing mr wells....if ya run that breather tube over the top of the cage ALL THE MOISTURE that gathers in it will eventually run right back into the engine and contaminate the oil...better to run the hose down so that moisture cant get into the engine...I have seen that little bit o...
by GMAC 76
Sun Oct 22, 2017 7:54 pm
Forum: Airboat Tech
Topic: replacing fuel pump on o520 aircraft
Replies: 3
Views: 790

Re: replacing fuel pump on o520 aircraft

X2 ON THE FACET ELECTRIC FUEL PUMP!!!!
by GMAC 76
Mon Oct 09, 2017 3:14 pm
Forum: Aircraft Power Only
Topic: case pressure...
Replies: 4
Views: 980

Re: case pressure...

kinda answered your own question didnt ya?......if the vent hose is kinking then the pressure will build.....fix the kinking vent hose so the crankcase can breath!!!!!
by GMAC 76
Tue Sep 26, 2017 12:51 pm
Forum: Aircraft Power Only
Topic: 0540 newb
Replies: 6
Views: 1136

Re: 0540 newb

message sent
by GMAC 76
Sun Sep 03, 2017 10:05 am
Forum: Aircraft Power Only
Topic: NEW 1-piece liquid cooled cylinder blocks for Lyc 360 & 540
Replies: 7
Views: 1605

Re: NEW 1-piece liquid cooled cylinder blocks for Lyc 360 & 540

OH BOY....$$$$$$$$$$$$$$$$$$$$$$$$$$$$
by GMAC 76
Tue Aug 29, 2017 7:30 pm
Forum: Aircraft Power Only
Topic: Lean/rich settings for 180Lycoming
Replies: 4
Views: 959

Re: Lean/rich settings for 180Lycoming

these guys are right on....run it at full rich and use it to kill the engine at full lean.....if you lean it out while cruising and all of a sudden need to stab the throttle it will usually stall out and fall flat on her face and that is not a good on an airboat!!!!!
by GMAC 76
Sun Aug 27, 2017 1:43 pm
Forum: Aircraft Power Only
Topic: GOOD GPU'S
Replies: 6
Views: 1186

Re: GOOD GPU'S

PM SENT
by GMAC 76
Tue Aug 15, 2017 2:40 pm
Forum: Aircraft Power Only
Topic: CARB NUMBER HELP
Replies: 3
Views: 565

Re: CARB NUMBER HELP

well Deno, it tells me that there is probably not going to be a MA-4-5, 5AA OR 6AA CARB oem for those engines.....appreciate the info good stuff...thanks
by GMAC 76
Tue Aug 15, 2017 11:10 am
Forum: Aircraft Power Only
Topic: CARB NUMBER HELP
Replies: 3
Views: 565

CARB NUMBER HELP

Can anyone tell me the carb model and part number for the oem carb on the go-480 lyc engine?
by GMAC 76
Mon Aug 14, 2017 9:31 pm
Forum: Airboat Talk
Topic: A man's word
Replies: 36
Views: 4465

Re: A man's word

time for an old fashioned road trip tony!!!
by GMAC 76
Sun Aug 13, 2017 6:19 pm
Forum: Aircraft Power Only
Topic: IO-720 Lycoming Fuel Injection Alternatives
Replies: 19
Views: 2405

Re: IO-720 Lycoming Fuel Injection Alternatives

well I sure think if he could build them for a 6cy he could build it for 8 cyl.....might be a hell of an idea there
by GMAC 76
Sun Aug 13, 2017 4:07 pm
Forum: Aircraft Power Only
Topic: IO-720 Lycoming Fuel Injection Alternatives
Replies: 19
Views: 2405

Re: IO-720 Lycoming Fuel Injection Alternatives

I don't think any aircraft carb at least that I am aware of would handle 720 cubic inches....couldn't flow enough air or fuel...I have seen a super charged 480 engine that was equipped with dual MA-6AA CARBS side by side on a Y pipe into a single pipe up to the super charger
by GMAC 76
Sun Aug 13, 2017 10:49 am
Forum: Aircraft Power Only
Topic: IO-720 Lycoming Fuel Injection Alternatives
Replies: 19
Views: 2405

Re: IO-720 Lycoming Fuel Injection Alternatives

yes sir you are certainly right...maybe the difference between upstack and regular exhaust or the airplane or helicopter application of the engine...either way it sure wont work on your engine his carb was just a little forward of where the oil filter is on your setup....good luck to ya hope ya find...
by GMAC 76
Sat Aug 12, 2017 10:10 pm
Forum: Aircraft Power Only
Topic: IO-720 Lycoming Fuel Injection Alternatives
Replies: 19
Views: 2405

Re: IO-720 Lycoming Fuel Injection Alternatives

if I remember right the adapter on this 720 was bolted to the front of the sump where the servo bolted up...looked like 4-5" dia aluminum pipe tur
ned up 90 degrees with a plate welded to the pipe to accept the carb.....it was not an upstack but I don't know what difference the sump is on an upstack
by GMAC 76
Sat Aug 12, 2017 5:14 pm
Forum: Aircraft Power Only
Topic: IO-720 Lycoming Fuel Injection Alternatives
Replies: 19
Views: 2405

Re: IO-720 Lycoming Fuel Injection Alternatives

seen a 720 in Nebraska some years ago that had a real nice adapter welded up similar to the units they use on the SC480'S ....it was hooked up to the front of the sump intake with a 4 barrel carb mounted on top out in front of and in between the mags...seemed to work really well but man did that eng...
by GMAC 76
Fri Jul 21, 2017 1:06 pm
Forum: Airboat Talk
Topic: Need HELP!!
Replies: 12
Views: 1458

Re: Need HELP!!

diamondback0320 wrote:You got to it B4 I could Greg..GOOD CATCH!!
great minds............uh tony...lol
by GMAC 76
Fri Jul 21, 2017 11:27 am
Forum: Airboat Talk
Topic: Need HELP!!
Replies: 12
Views: 1458

Re: Need HELP!!

Is the starter turning it over? If so I would say make sure the mag is not grounded. There is a small wire coming out of the mag or mags if it is grounded that is how you turn them off. Whatever you do just make sure you don't put power to the mags because you'll burn them up, when they are ON they...

Go to advanced search