Search found 1330 matches

by Des Moines Boater
Thu Apr 28, 2011 7:53 am
Forum: Aircraft Power Only
Topic: Lets talk CHT gauges N stuff
Replies: 9
Views: 723

Re: Lets talk CHT gauges N stuff

Aircraft Spruce is a good source. The 18mm spark plug sensors are the easiest for aircraft. I have a six position switch, 6 sensors and one gauge. The gauges are made for the interior of an aircraft and are not weather proof. I keep a small cover over mine when not in use to protect the gauge from r...
by Des Moines Boater
Wed Apr 27, 2011 2:53 pm
Forum: Airboat Tech
Topic: Fuel additives for Continental 0-300
Replies: 7
Views: 711

Re: Fuel additives for Continental 0-300

That engine was designed for 80/87 octane aviation fuel if you can find it. 100 octane AvGas is still the best fuel for that engine. It has a long shelf life and keeps the engine clean. Give a carburetor to an aircraft mechanic and he will tell you in an instant if you used auto gas. Auto gas will w...
by Des Moines Boater
Sun Apr 24, 2011 7:59 am
Forum: Airboat Tech
Topic: Can anyone ID the oil screen nut for Continental 0-300
Replies: 9
Views: 2251

Re: Can anyone ID the oil screen nut for Continental 0-300

Here's a picture from fragwacker of his O-300. If you look below the right magneto and just unter the black generator you see a big gold colored brass nut with two pipe fittings attached. That is the oil screen. The oil drain screen is just below that and has been removed already in this picture. Ho...
by Des Moines Boater
Sat Apr 23, 2011 7:03 pm
Forum: Airboat Tech
Topic: Can anyone ID the oil screen nut for Continental 0-300
Replies: 9
Views: 2251

Re: Can anyone ID the oil screen nut for Continental 0-300

Your oil screen is in the accessory case. It is under the right magneto. It should be brass and has four sides. It is big. You can't miss it. The brass acorn nut is your oil pressure regulator. Don't take it off. Stand behind the engine and look at your two magnetos. The oil screen is below the one ...
by Des Moines Boater
Sat Apr 23, 2011 8:00 am
Forum: Airboat Tech
Topic: Are there any oil filters on a Continental 0-300 to change??
Replies: 2
Views: 386

Re: Are there any oil filters on a Continental 0-300 to chan

There is no oil filter on the O-300 unless one was added. If one was added it would be obvious. There is an oil screen that should be removed and cleaned. It is located just below the right magneto. It looks like a large brass nut. Remove that and the screen is attached. Have a rag handy.
by Des Moines Boater
Fri Apr 22, 2011 8:58 am
Forum: Airboat Tech
Topic: Oil recommendation for Continental 0-300
Replies: 10
Views: 1025

Re: Oil recommendation for Continental 0-300

Twister69z works at a certified repair station that overhauls aircraft engines, cylinders and other aircraft parts. He has seen damaged internal parts on engines that run Aeroshell 15-50. He has seen enough of them that he concluded that it is best not to put the semi-synthetic oil in your engine if...
by Des Moines Boater
Sat Apr 16, 2011 12:45 pm
Forum: Aircraft Power Only
Topic: Backfire when hot
Replies: 5
Views: 703

Re: Backfire when hot

Could be the magnetos breaking down. How high are the cylinder temps getting? The oil temp should be fine as long as the cylinder temps are within limits. Those cylinders should be near 400°. If you can hold your hand on on a cylinder, maybe it's not firing. Odd to have high oil temp and low cylinde...
by Des Moines Boater
Mon Apr 11, 2011 6:58 pm
Forum: Aircraft Power Only
Topic: fuel pessure for a 220 gpu
Replies: 6
Views: 513

Re: fuel pessure for a 220 gpu

5 to 7 pounds and no more. Too much pressure will push fuel past the seat. Did you get that magneto overhauled? I found most problems that seem fuel related are probably just a bad magneto. Start with a known good magneto before you try chasing down fuel problems that may or may not exist. The guy I...
by Des Moines Boater
Sun Apr 03, 2011 8:22 pm
Forum: Airboat Tech
Topic: Cooling a VW Airboat.
Replies: 14
Views: 1610

Re: Cooling a VW Airboat.

The big cooling fan on top was necessary inside the hood of the VW but not needed in my application. A lot of guys in my EAA chapter built VW projects and none used the fan. I built two Volksplanes and never had a propblem with heat. I always ran a CHT and never had a problem. Of course I only used ...
by Des Moines Boater
Sun Apr 03, 2011 7:57 am
Forum: Airboat Tech
Topic: Cooling a VW Airboat.
Replies: 14
Views: 1610

Re: Cooling a VW Airboat.

I ran this one for a couple of years without the shroud and had no troubles with heating. I'd run it full blast for almost an hour and never a problem. This one was a 1600 cc direct drive.

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by Des Moines Boater
Sat Apr 02, 2011 6:21 pm
Forum: Aircraft Power Only
Topic: cylinder temp gauge
Replies: 2
Views: 584

Re: cylinder temp gauge

I have a six cylinder motor and have six spark plug probes that connect to a six position switch. I have a single CHT gauge and just switch to check each cylinder. Number 4 is my hottest cylinder, so, I usually just leave the switch on number 4. There is no electrical connections. The gauge works by...
by Des Moines Boater
Sun Mar 20, 2011 8:40 am
Forum: Aircraft Power Only
Topic: OK so this mag is kicking my butt
Replies: 4
Views: 814

Re: OK so this mag is kicking my butt

First, does the magneto have spark? The easiest way to tell is with the magneto out, have someone you don't like hold the P-lead. Now flip the magneto over by hand and see if he lights up. If it has spark, set the gear so the red mark in the inspection window is centered. Make sure the engine is on ...
by Des Moines Boater
Sun Mar 13, 2011 10:10 am
Forum: Aircraft Power Only
Topic: Lycoming 4-Cyl Mag Questions
Replies: 26
Views: 2047

Re: Lycoming 4-Cyl Mag Questions

Magnetos fire before top dead center. Usually around 20° or so and 30° on 220 GPU's. The starter doesn't give the engine enough inertia to swing the engine past top dead center if the cylinder fires. The impulse magneto delays the ignition to near top dead center. That way the engine doesn't turn ba...
by Des Moines Boater
Thu Mar 10, 2011 11:24 am
Forum: Aircraft Power Only
Topic: FLY WHEEL 220
Replies: 4
Views: 480

Re: FLY WHEEL 220

Spend the extra dollars and just get the Dick Waters Air-Tec system. That will eliminate all of your problems.
http://www.airtecinc.us/airboat/index.html
by Des Moines Boater
Sun Feb 06, 2011 8:50 am
Forum: Airboat Talk
Topic: Anyone heard of this guy?????
Replies: 14
Views: 1359

Re: Anyone heard of this guy?????

Anyone who shows up with cash should be all right. A check of any kind should be avoided. Banks will cash anything these days that looks like a check. Then a few weeks later they find out the check is bad and take the money out of your account. Like I said, CASH works for me.
by Des Moines Boater
Wed Jan 19, 2011 2:35 pm
Forum: Aircraft Power Only
Topic: First time 220 Airboat owner- Got Ripped off - Need Opinions
Replies: 57
Views: 4586

Re: First time 220 Airboat owner- Got Ripped off - Need Opin

Cylinders are the biggest problem with the 220 GPU's but it's also the easiest thing to fix. Being a poor person I replaced my cylinders two at a time until I finally was able to afford the last two. Mine were in terrible shape too but it still ran good enough that I never missed a day on the river....
by Des Moines Boater
Tue Dec 21, 2010 11:47 am
Forum: Aircraft Power Only
Topic: GPU TORQUE SPECS
Replies: 4
Views: 625

Re: GPU TORQUE SPECS

7/16-20 bolts and studs 490-510 inch pounds, 1/2-20 360-440, 3/8-24 340-360, 5/16-24 or 20 180-220, 1/4-28 70-80, 18mm spark plugs 300-360. To convert to foot pounds just divide by 12. A star pattern is fine.
by Des Moines Boater
Sun Dec 19, 2010 3:12 pm
Forum: Aircraft Power Only
Topic: 0-470 sparkplug gap
Replies: 3
Views: 444

Re: 0-470 sparkplug gap

.018 to .020
by Des Moines Boater
Thu Nov 18, 2010 7:11 pm
Forum: Aircraft Power Only
Topic: 0320 help
Replies: 8
Views: 606

Re: 0320 help

D-16's are all right. Just make sure they are gapped .018 to .020. The idle screw adjustment is strickly for the idle circuit. Adjust it at idle (500-600 rpm's) and only at idle. With the throttle plate closed, the only gas that gets to the engine is through the idle circuit. Turn the idle screw in ...
by Des Moines Boater
Thu Nov 18, 2010 11:35 am
Forum: Aircraft Power Only
Topic: 0320 help
Replies: 8
Views: 606

Re: 0320 help

Here's a picture. The only two screws are the idle air screw and linkage adjustment, that you should have to adjust. http://i.ebayimg.com/19/!B8pnwu!!Wk~$(KGrHqIOKiYEy9OK-eDLBM3rvzZ3Tg~~_12.JPG I know from experience that a lot of what seems to be fuel problems are actually bad magnetos. Get those l...
by Des Moines Boater
Mon Nov 15, 2010 8:51 am
Forum: Aircraft Power Only
Topic: Timing mags with buzz box and cht ?'s
Replies: 2
Views: 504

Re: Timing mags with buzz box and cht ?'s

It sounds like you did everything correctly. The only suggestion I have is if you have impulse mags is to pull the prop to just past TDC to click or trip the impulse spring before you time the mags. Then back the prop up to just past the degree mark you need and pull it forward again to your timing ...
by Des Moines Boater
Thu Nov 11, 2010 10:37 am
Forum: Aircraft Power Only
Topic: 220 gpu crankcase venting
Replies: 8
Views: 1246

Re: 220 gpu crankcase venting

Here's a picture of one similar to JAMES. He runs it from the accessory case to an air/oil separator and then into the exhaust. If you have good cylinders you won't need the air/oil separator.

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by Des Moines Boater
Mon Oct 25, 2010 9:01 am
Forum: Airboat Tech
Topic: looking for pics of "flat" rudder
Replies: 10
Views: 984

Re: looking for pics of "flat" rudder

Here's one. It is basically just a speed limit sign painted yellow. It has a piece of iron on one side that goes from top to bottom at the pivot point. Nothing special.

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by Des Moines Boater
Sun Oct 17, 2010 7:53 am
Forum: Aircraft Power Only
Topic: ethanol???
Replies: 15
Views: 1389

Re: ethanol???

Ethanol is so corrosive, it eats up everything that isn't stainless. The problem I had with regular gas was not getting ethanol in it. The truck that brings ethanol also brings regular gas. The regular gas now has a little ethanol in it. The single pump I use for regular was just used by an ethanol ...
by Des Moines Boater
Fri Oct 15, 2010 1:15 pm
Forum: Aircraft Power Only
Topic: Oil for 220cpu
Replies: 12
Views: 815

Re: Oil for 220cpu

Your mark on the dipstick may be off. I had the same problem when I bought my first 220 GPU. It only had 4 quarts when I drained it. I put on a sight gauge and marked each quart as I filled it. After the cooler is full I only put in 10 quarts. Once I put on 6 Speed Wheelie cylinders the blowby was e...

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