Jump to content

Is Engine Primer really necessary?


Radioflyer

Recommended Posts

My O-320 LongEz has a manual primer pump with lines going to cylinders 2 and 4. I can't remember the last time I even used the primer. I simply turn on the facet fuel pump until pressure registers, turn it off, switch on my electronic and magneto ignitions, press start and the engine fires on forst or second blade. Maybe it take 3 or 4 blades in the winter, but I always preheat. So...I'm thinking of removing the primer plumbing.

Link to comment
Share on other sites

If your carb has an accelerator pump you don't need the primer plunger. 1-2 strokes on the throttle will pump fuel into the air inlet filter. If you manually pull the prop through 3-4 times before cranking, that will charge the cylinders with fuel vapor and the engine will fire right off.

 

If you don't have an accelerator pump there isn't a quick way to get fuel into the inlet before cranking without the primer plunger.

Link to comment
Share on other sites

I had a pumper carb with no primer engine that i finally added an electric 2-cyl primer to. The no primer/pumper carb would usually start Ok but when it was cold, the primer worked better.

 

I was always afraid of an intake fire with the pumper carb but that's pretty rare.

 

I'd keep it for cold weather situations and use it once in a while to make sure it works. Sometimes debris can clog the atomizers

-kent

-Kent
Cozy IV N13AM-750 hrs, Long-EZ-85 hrs and sold

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.
Note: Your post will require moderator approval before it will be visible.

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