Search found 1145 matches

by GMAC 76
Sun Jun 02, 2019 5:14 pm
Forum: Aircraft Power Only
Topic: Lycoming 0290 help
Replies: 4
Views: 1037

Re: Lycoming 0290 help

the 290...125hp stock uses an MA-3SPA carb ….I believe the biggest engine to use that carb is the C-145 Continental but I don't see a lot of improvement in performance with just a carb change....jmo
by GMAC 76
Thu May 09, 2019 9:21 am
Forum: Aircraft Power Only
Topic: 0-320 spark plug
Replies: 5
Views: 1115

Re: 0-320 spark plug

imo…..the new autolite #386 nickel plated....gapped at .022-.024
by GMAC 76
Fri Apr 19, 2019 5:31 pm
Forum: Airboat Talk
Topic: mag help
Replies: 2
Views: 314

Re: mag help

I work on bendix mags but i am little far away in lake placid
by GMAC 76
Tue Apr 16, 2019 12:37 pm
Forum: Aircraft Power Only
Topic: Carb id # for franklin 0199/0200
Replies: 4
Views: 382

Re: Carb id # for franklin 0199/0200

usually the main nozzle/jet is the only difference......I cannot find that 10-2153 number carb any where in the Marvel Schebler book...imo the best carb for that engine would be the #3 carb for an 0-200 cont or an 0-235 lyc….both produced the same hp and rpm as the franklin...knowing that I do have ...
by GMAC 76
Tue Apr 16, 2019 9:53 am
Forum: Aircraft Power Only
Topic: Name this Motor.... No Nameplate
Replies: 16
Views: 2371

Re: Name this Motor.... No Nameplate

looks like a narrow deck straight valve 0-360 Lycoming....with a really piss poor spark arrestor set up...lol
by GMAC 76
Mon Apr 15, 2019 9:26 pm
Forum: Aircraft Power Only
Topic: Carb id # for franklin 0199/0200
Replies: 4
Views: 382

Re: Carb id # for franklin 0199/0200

carb for the 4ac-199 and 0-200-1 is an MA3P....10-2302
by GMAC 76
Sat Apr 13, 2019 8:55 pm
Forum: Airboat Talk
Topic: Frog Gig info needed
Replies: 15
Views: 1446

Re: Frog Gig info needed

buy a right handed gig and just turn it over 1/2 turn...waaalaaa left handed gig...works every time
by GMAC 76
Fri Apr 12, 2019 10:21 am
Forum: Airboat Tech
Topic: 220 gpu won’t start???
Replies: 5
Views: 1743

Re: 220 gpu won’t start???

I agree with diesel250….if ya have fuel, air, spark and compression and it wont fire I would look at the engine/magneto timing
by GMAC 76
Wed Apr 10, 2019 10:24 am
Forum: Aircraft Power Only
Topic: Perplexed by Mag ID
Replies: 5
Views: 520

Re: Perplexed by Mag ID

welcome to the world of Frankenstein mags and carbs.....all the cases in the 20/200 series are basically the same ...the tags are from factory assembly......the s6ln-23 mag is oem on the 220 gpu but can easily be converted to a 4cyl mag by changing internal parts and the setup....so to answer your q...
by GMAC 76
Tue Apr 09, 2019 8:22 pm
Forum: Aircraft Power Only
Topic: Carb rebuild ????
Replies: 22
Views: 1196

Re: Carb rebuild ????

Pioer77p wrote:Looking to get in touch with GMAC 76 about rebuilding ma4spa carb for 0-360. My email : piper77p@yahoo.com
I tried to e-mail ya ...wouldn't go thru.....the 0-360 does not use a 4spa they use an MA-4-5....gonna try the e-mail again
by GMAC 76
Sun Apr 07, 2019 11:45 am
Forum: Aircraft Power Only
Topic: 290 GPU generator. or alternator. what to use?
Replies: 4
Views: 421

Re: 290 GPU generator. or alternator. what to use?

just curious....where is the generator mounted on the 290 GPU engine?
by GMAC 76
Thu Mar 21, 2019 8:30 pm
Forum: Aircraft Power Only
Topic: Warp Drive Style Hub on C85 Tapered Shaft?
Replies: 2
Views: 263

Re: Warp Drive Style Hub on C85 Tapered Shaft?

I had a 3 blade warp on a 65 cont on an old wildcat 11' hull I used for duck hunting..it worked great and no it would not run the hill...
by GMAC 76
Fri Mar 15, 2019 9:52 am
Forum: Aircraft Power Only
Topic: MA 4-5 Venturi
Replies: 3
Views: 331

Re: MA 4-5 Venturi

I picked it up years ago from an A&P friend .......there is one for sale on e-bay #7446...but it may be for the smaller carbs not sure without looking it up ...try messaging twister here on SA ....he may be able to help ya out
by GMAC 76
Thu Mar 14, 2019 6:00 pm
Forum: Aircraft Power Only
Topic: MA 4-5 Venturi
Replies: 3
Views: 331

Re: MA 4-5 Venturi

I do not have the 1 piece that ya need but I do have the tool used to remove and install the 1 piece venture....it takes a hand press to use it.....but I bet someone on SA has what ya need
by GMAC 76
Thu Mar 14, 2019 10:11 am
Forum: Aircraft Power Only
Topic: Lycoming carb
Replies: 2
Views: 283

Re: Lycoming carb

boostedigo540 wrote:MA 3 SPA. I HAVE A FEW
the man is exactly right MA-3SPA.......... but make sure ya get the right part number for the 0-290 some of those carbs are for much smaller hp engines
by GMAC 76
Mon Mar 04, 2019 8:53 pm
Forum: Aircraft Power Only
Topic: Thoughts on 4 cylinder boats
Replies: 18
Views: 1785

Re: Thoughts on 4 cylinder boats

IMO....there is nothing more fun to run than a light, free running little sled with a rank 200lyc....but like Gary S said be smart on the load and don't bring the neighborhood...but damn they are fun!!!!!
by GMAC 76
Fri Mar 01, 2019 8:04 pm
Forum: Airboat Talk
Topic: Sled hulls
Replies: 13
Views: 1173

Re: Sled hulls

it is really hard to give a definite reason but if ya ever drive one (a good free running no hop rig) then you will know the reason....
by GMAC 76
Wed Feb 27, 2019 8:42 pm
Forum: Airboat Tech
Topic: MA 4-5 air cleaner bolt size
Replies: 2
Views: 1432

Re: MA 4-5 air cleaner bolt size

1/4 x 20...make sure ya use a short bolt on the 2 holes that are in the bowl so ya don't punch a hole in the bowl bottom or put 1/4 x 20 studs in those holes
by GMAC 76
Mon Feb 25, 2019 6:31 pm
Forum: Aircraft Power Only
Topic: O-360 Motor Mounts
Replies: 5
Views: 396

Re: O-360 Motor Mounts

I think the rears are automotive transmission mounts....like Bob said I never seen a 360 with that type of nose mount before......learn something new everyday
by GMAC 76
Sun Feb 24, 2019 8:14 pm
Forum: Aircraft Power Only
Topic: Carb rebuild ????
Replies: 22
Views: 1196

Re: Carb rebuild ????

aircraft spruce.....got many many cht gauges and sending probes and thermocouples at a wide range of prices
by GMAC 76
Sun Feb 24, 2019 10:07 am
Forum: Aircraft Power Only
Topic: Carb rebuild ????
Replies: 22
Views: 1196

Re: Carb rebuild ????

I get about 50 degrees cooler on top plug vs point I show in pic, which reads 100 low. So 350 on the top plug would be roughly 500 on the CHT sensors. I understand what guys are doing with the IR guns etc...but wouldn't it be simpler to just buy a good quality FAA/PMA approved CHT gauge install it ...
by GMAC 76
Sun Feb 24, 2019 9:57 am
Forum: Aircraft Power Only
Topic: Carb rebuild ????
Replies: 22
Views: 1196

Re: Carb rebuild ????

Bro,do yourself a big favor and do not let that boat idle until it’s seated the rings. Or you’ll be taking her back Down did a fresh 540 last summer that a guy idled up n down the idle zone. He swore the builder ripped him off. Not so. Man build him a fine motor,he broke it in wrong. Run the piss o...
by GMAC 76
Fri Feb 22, 2019 11:12 am
Forum: Aircraft Power Only
Topic: Carb rebuild ????
Replies: 22
Views: 1196

Re: Carb rebuild ????

I think most guys shoot the cht with the IR gun at the base of the top sparkplug....shoot all 4 to find out which cyl is the hottest......200 rpm drop is too much.....on your check off list add a possible carbon track on one of the dis. block towers...them 4cyl bendix mags are famous for carbon trac...
by GMAC 76
Thu Feb 21, 2019 9:34 am
Forum: Airboat Tech
Topic: thrust vectoring
Replies: 3
Views: 1704

Re: thrust vectoring

I remember seeing some kits available to mount small engines and props on jon boats and they steered by rotating the entire assembly
by GMAC 76
Sun Feb 17, 2019 9:17 pm
Forum: Aircraft Power Only
Topic: Carb rebuild ????
Replies: 22
Views: 1196

Re: Carb rebuild ????

if the solder job don't work I got a bunch of the housings and gaskets ...if ya find ya just need a few gaskets and small parts let me know I got everything for those carbs and ya wont have to buy a complete aircraft overhaul kit....good luck

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