banner graphic
Airport Webcams
Who's Online
28 registered (Randy Crosby, TweetieHawk, chinnook, Luvrv8, Joeman434, pjd, flyer921, Cessna Guy, mitchwilliams, Pilawt, sjp, Rick Y., Clay1pilot, cadcap, Teg916, Ed_Clayton, riz, DA900DVR, Gunnersmokes, MaineMan, BenC, Willie, Cbray, Hounds14, JKunzy, rlove2908, Pilot110, Jpod), 95 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Newest Members
Don Lee, Mike5605R, hall11, Scottaustin26, Phillip
6307 Registered Users
Top Posters
Bargain Bob 94112
Cessna Dude 6628
vettdvr 5476
Rusty Rudder 5000
California Flyer 4743
Clyde Cessna 3308
wrecksum 2704
Willie 2602
Ward Holbrook 2133
XP Driver 2110
Don Tedrow 1992
Nightowl 1826
ytodd 1823
RodneyHooverCFI 1642
Lee T. Hargic 1629
Nintendo Pilot 1624
Glenn Darr 1611
oilwell1415 1602
November X-ray 1589
Bigdoggh 1438
Pilawt 1387
Peedie Montgomery 1244
Jim_1 1206
EdW 1181
Propduster 1061
Awkward Bird 1012
Showboatsix 999
Shuswap 931
OldCrow 877
Renegade 9 873
Top Posters (30 Days)
Bargain Bob 3125
vettdvr 177
Joeman434 152
Willie 85
Desert Hawk 55
Don Tedrow 46
Luvrv8 44
Rusty Rudder 43
Shuswap 41
Pilot110 32
farnk 31
Wayne R 28
oilwell1415 27
3.14 LET 27
Singh 26
N5479R 26
Ward Holbrook 26
JD Casteel 25
Peedie Montgomery 25
Teg916 24
Henry M. 24
California Flyer 24
Captain Sam 21
Dave W 21
Ron Patton 19
Clyde Cessna 16
Glenn Darr 16
Fischer 15
Pilawt 15
TweetieHawk 13
Topic Options
#33102 - 04/15/11 12:14 PM Starter Solenoid Screw Up
EdW Offline
Club Sponsor
Gold Pilot

Registered: 11/21/10
Posts: 1181
Loc: Just east of Graceland
My starter solenoid was working when it felt like it (would work every twenty or so tries), so I got mad and broke down and replaced it. About a flying hour later, I started getting a whine in my comms, about like a teenager being told his allowance was being reduced. I figured the capacitor on the alternator was showing its age, so replaced it. Didn't help a bit.

Yesterday I was going to go shoot some touch and goes. As soon as I turned on the master switch the prop started to turn. "Hmm," I thought, "That ain't right."

I opened the oil door, and the first thing I saw was that the insulation on the battery cable had melted, and was too hot to touch. When I opened the battery box, the lead terminal on the positive end had melted and pooled on the top of the battery. Some kinda hot, I imagine.

Apparently, my new starter soleniod shorted out internally, allowing power to the starter at all times. The noise I heard was the starter trying to be a generator, and all the confused electrons generated enough heat to damage my components.

I replaced the battery (no Concorde immediately available, so Gill), replaced the positive cable, and put the old, intermittent solenoid back on until I can get a replacement. Whine disappeared, and everything else operated normally. Fortunately, nothing else was damaged. Off I went, into the wild blue yonder.

Now, if I could only remember how to make them damned 'squeaker' landings!



Edited by EdW (04/15/11 12:15 PM)

Top
#33105 - 04/15/11 12:25 PM Re: Starter Solenoid Screw Up [Re: EdW]
Lee T. Hargic Offline
Gold Pilot

Registered: 08/13/10
Posts: 1629
Loc: Louisville, KY
I didn't think those kind of things happened to maintenance types... Everytime I have an issue it clears up when I try to show it to a mechanic.
_________________________
"A smart man learns from his mistakes. A wise man learns from the mistakes of others" -Anonymous

Top
#33114 - 04/15/11 12:59 PM Re: Starter Solenoid Screw Up [Re: Lee T. Hargic]
joelaff Offline
Bronze Pilot

Registered: 04/08/11
Posts: 615
Loc: Missouri, USA
Makes you think "clear" ought to be required before turning on the master switch... I suppose not a bad plan in case the ignition switch has failed as well.
_________________________


Top
#33180 - 04/15/11 09:15 PM Re: Starter Solenoid Screw Up [Re: Lee T. Hargic]
EdW Offline
Club Sponsor
Gold Pilot

Registered: 11/21/10
Posts: 1181
Loc: Just east of Graceland
Originally Posted By: KevinMcP
I didn't think those kind of things happened to maintenance types... Everytime I have an issue it clears up when I try to show it to a mechanic.
Ever hear of Murphy? I married their red-headed daughter.

Top
#33187 - 04/15/11 09:29 PM Re: Starter Solenoid Screw Up [Re: EdW]
Skyhawker04 Offline
Safety Pilot

Registered: 03/24/11
Posts: 73
Loc: Missouri
Check under the ground lug Ed. Make sure you did not melt a bigger hole.
_________________________
Craig A&P IA
Cessnas 2 Oshkosh
1961 C-172B
FLY NAVY


Top
#33204 - 04/16/11 12:11 AM Re: Starter Solenoid Screw Up [Re: Skyhawker04]
EdW Offline
Club Sponsor
Gold Pilot

Registered: 11/21/10
Posts: 1181
Loc: Just east of Graceland
Originally Posted By: Skyhawker04
Check under the ground lug Ed. Make sure you did not melt a bigger hole.
I did, all ok

Top
#33221 - 04/16/11 09:37 AM Re: Starter Solenoid Screw Up [Re: EdW]
November X-ray Offline
Club Sponsor
Gold Pilot

Registered: 08/15/10
Posts: 1589
Loc: Brookshire, Texas, USA
Don't you just hate it when that happens!
_________________________
N. X.




www.cessna172club.com

Top
#33235 - 04/16/11 02:05 PM Re: Starter Solenoid Screw Up [Re: November X-ray]
vettdvr Offline
Club Sponsor
Diamond Pilot

Registered: 06/24/10
Posts: 5476
Loc: Slidell La
I had that happen in a car but caught it before damage. You have done some (don't know how much) damage to your starter also. The solneoid you bought was clearly defective and you need a new one to repair this problem

Remember NEW does not = GOOD. It is possible to buy new, defective parts.
_________________________
Vettdvr

Single/Multi/instrument/type/commercial But then I am still learning.

Top
#33245 - 04/16/11 04:53 PM Re: Starter Solenoid Screw Up [Re: vettdvr]
JohnS Offline
Safety Pilot

Registered: 10/11/10
Posts: 25
Loc: Wichita, KS
Double check the solenoid! A starter solenoid should energize and release....a master or battery solenoid is designed to stay closed. They both look similar, if not identical. One way to tell is if they are rated "intermittent duty" for starter or "continuous duty" battery.
_________________________

Top


Cessna172 Tribute
THIS MONTH'S SPONSOR
Special thanks to:
You!
Thank you for making this site great
Strother '15 Countdown
June 18-21, 2015 KWLD
Today's Birthdays
ces6508, David
Member Map
Where in the world are the Cessna 172 Club Members?

View the map

Helpful Links
100LL Price Finder
AD Directory
Aging GA Aircraft
Aircraft Directory
Airplane Report
AirNav
Airport Facilities Directory
AOPA
Aviation Weather
Barnstormers
BaseOps
C172 History
Cessna
Controller
Crash Records
DUAT Voyager Planner
DUATS
FAA
FltPlan
Flight Aware
Fly-In Calendar
Flying Tools (Files)
Google Earth
Ground Speed Records
National METAR Map
Sky Vector
Trade-A-Plane
Uvalde Flight Ctr
All the Webcams
Shout Box

AOPA
AOPA
Weather Lookup
Airport code:
(separate multiple codes with spaces)

List of stations