Jump to content

Hot startup


Dood

Recommended Posts

My lycoming (on a M20J)  is very very hard to start when the temperature is hot or when the motor has just make a flight. 

 

The motor has only 400 hours since overhaul.

 

Have you the same problem ? Can you describe me your engine start procedure  ?

 

thanks

Link to comment
Share on other sites

I've owned my 81' J for a little over a year and had the same problem initially. Many on this site suggest to leave the throttle at 1000 rpm at shut down and don't touch it. For hot start up leave the mixture closed and turn it over. When it fires push the mixture in. Works every time. I do the same on cold starts with the added step of 5 secs of boost pump the the mixture wide open before closing it for start. It really seems to help to have the throttle open to that magic 1000rpm mark.

  • Like 3
Link to comment
Share on other sites

My lycoming (on a M20J)  is very very hard to start when the temperature is hot or when the motor has just make a flight. 

 

The motor has only 400 hours since overhaul.

 

Have you the same problem ? Can you describe me your engine start procedure  ?

 

thanks

Ah, the joys of a C! Mixture rich, pump throttle, turn key & push, release when it fires. Every time, hot, cold, recently flown or snowy (with preheat).

  • Like 1
Link to comment
Share on other sites

Ah, the joys of a C! Mixture rich, pump throttle, turn key & push, release when it fires. Every time, hot, cold, recently flown or snowy (with preheat).

+1 for the C. A friend who owns a J commented when leaving Don Maxwell's that I should have had my engine checked as it started toooo fast!

Link to comment
Share on other sites

Mine is a TSIO but I believe the principles are the same.  When hot, I don't prime, pump or anything else.  I crack the throttle, go full rich, and it almost always fires right up.

 

Question: when did you last check the timing on your mags?  That was the culprit when I went through a period of hard starts.

Link to comment
Share on other sites

My lycoming (on a M20J)  is very very hard to start when the temperature is hot or when the motor has just make a flight. 

 

The motor has only 400 hours since overhaul.

 

Have you the same problem ? Can you describe me your engine start procedure  ?

 

thanks

At 400 hours you're close to needing the 500 hour check completed on your magneto or magnetos. Along with magneto maintenance check your spark plugs, if they are Champion brand check them for high internal resistance.

Clarence

Link to comment
Share on other sites

At 400 hours you're close to needing the 500 hour check completed on your magneto or magnetos. Along with magneto maintenance check your spark plugs, if they are Champion brand check them for high internal resistance.

Clarence

 

Thanks Clarence, I'll check my spark plugs

Link to comment
Share on other sites

  • 5 weeks later...

Just do a flooded engine start when it's hot. Mixture at cutoff, throttle full open, crank, and adjust throttle/mixture when she fires.

This works for me, too. 201J.

If it only sat for a few hrs & still warm, it takes a fairly short shot of boost fuel/mix rich. Then idle cut off & crank. Think every motor's a little different.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.