Trouble starting when hot

Post Reply
panheadcrazy
Posts: 9
Joined: Mon Jul 16, 2007 10:39 am
Has thanked: 2 times

Trouble starting when hot

#1

Post by panheadcrazy » Sat Apr 07, 2007 1:02 am

I have a 48 restored, stock PAN. It runs good, starts good, 1st or 2nd kick when cold. However, it can be difficult to start when hot. It will often starts up on the first kick when hot, but if it doesn't, then I often have to wait till it cools down a bit before I'm able to start it. Any suggestions?



Panacea
Posts: 1864
Joined: Fri May 24, 2002 1:00 am
Bikes: 64FL 99FLHR 01FXSTD
Location: Mpls. MN.
Has thanked: 14 times
Been thanked: 57 times

Re: Trouble starting when hot

#2

Post by Panacea » Sat Apr 07, 2007 1:19 am

Hi PHC, what carb are you running? Do you use a choke when it's cold? If she won't start when hot, have you tryed holding the throttle wide open? Have you tested the intake for leaks? Do a search here for intake leak, you will find good info for testing. Keep us posted ,someone here has probably run into the same problem and will chime in shortly. Good luck, Mike

panheadcrazy
Posts: 9
Joined: Mon Jul 16, 2007 10:39 am
Has thanked: 2 times

Re: Trouble starting when hot

#3

Post by panheadcrazy » Sat Apr 07, 2007 12:01 pm

Thanks Mike, I run the stock Linkert. I use standard operating procedure when starting cold, you know, retard spark, prime engine, etc. etc. .I usually start it hot with throttle half to three-quarters open, and I have done it all the way open also. I have not noticed a difference. But I will check intake for leaks. Thanks, PHC

Cotten
Posts: 6911
Joined: Mon Aug 26, 2002 9:09 am
Location: Central Illinois
Has thanked: 100 times
Been thanked: 268 times

Re: Trouble starting when hot

#4

Post by Cotten » Sat Apr 07, 2007 1:07 pm

Holes get bigger when they get warm.
So when cold, the vacuum leak may be hard to find.
When pressuretesting, inspect it for several minutes to make certain that no tiny 'blisters' or 'beards' of tiny foam form over time.

And on Pans, always remember to test the pancover screw over each intake port!

.....Cotten

Pantony
Posts: 149
Joined: Sun Sep 10, 2006 3:23 pm
Location: Milwaukee Wisconsin
Been thanked: 1 time

Re: Trouble starting when hot

#5

Post by Pantony » Mon Apr 09, 2007 12:41 am

Cotton how do i get one of your intake testing gizmo's

FlatHeadSix
Moderator
Posts: 2683
Joined: Sun Jun 06, 2004 5:14 pm
Bikes: '31 VL, '34 VD, '45 WLA, '47 WL, '49 FL, '51 WL, '58 ST (Hummer), '71 GE (Servi)
Location: Lonoke, Arkansas
Has thanked: 5 times
Been thanked: 31 times

Re: Trouble starting when hot

#6

Post by FlatHeadSix » Mon Apr 09, 2007 12:57 am

Pantony,
mbskeam sold me one of his and it works great! He even modified it so I could use it on either 3 or 4 bolt Linkerts because I have both Panheads and Flatheads.
Jump in here Mike and hook the boy up!

DuoDave
Posts: 234
Joined: Tue Mar 16, 2004 10:45 pm

Re: Trouble starting when hot

#7

Post by DuoDave » Mon Apr 09, 2007 8:57 am

The first step should definitely be a leak check on the intake. Try holding the throttle an eighth to a quarter open for hot starts, or even keep the throttle closed. Pans seem to flood easily, so if it has not started after a couple of kicks, wind the throttle full open and kick with the ignition on. Four or five kicks ought to do it.

Rammy
Posts: 116
Joined: Sat Jul 14, 2007 9:07 pm
Been thanked: 1 time

Re: Trouble starting when hot

#8

Post by Rammy » Sun Apr 29, 2007 11:45 am

I have had this same hot problem too. I popped the air cleaner off when the engine was hot and parked for a while and looked in that linkert to find a thick fog of gas vapor swarming around in there . I think that is what floods them when they are hot and you shut it down. when I shut my pan off hot I leave the throttle wide open to let the vapor escape and mix with fresh air, then shut the throttle the next time I start it up. this seems to help most of the time.

Post Reply

Return to “Troubleshooting”