Titan 57 - no hot starts

[MDWill]

Hi,
I've got a Mcculloch Titan 57 that I like for light milling, but it absolutely will not start again once hot. I'm thinking possibly a bad coil, as I've gone through the carb (and fuel lines), and it does not seem to be running rich. I've been unable to find a replacement coil. Thoughts? Sources?

Thanks for any help!

 

[jp233]

is the fuel cap vented, like with the duckbill akin to other Mac models? I'm not familiar with the Titan saws much.

You could test the theory pretty quick by getting it hot, shutting it down, and taking the fuel cap off to see if there is pressure or what. You could also check spark when it's hot to see what's going on with the Zap side.

 

[Wood Doctor]

A guy gave me a Titan 57 to work on five years ago. No parts are available. It wound up on the display shelf at his local bar. It looks rather good there. After a few beers, nobody knows what it is but they always ask about it.

 

[heimannm]

Most likely the electronic ignition coil, they are somewhat problematic. If you have an assortment of McCulloch coils on hand you might be able to find one that can be made to work. The OEM parts are getting harder to find and reliability will always be questionable. Some have reported success in transplanting the electronic coil from more modern saws onto the original laminations but I have not attempted that myself.

Mark

 

[MDWill]

is the fuel cap vented, like with the duckbill akin to other Mac models? I'm not familiar with the Titan saws much.

You could test the theory pretty quick by getting it hot, shutting it down, and taking the fuel cap off to see if there is pressure or what. You could also check spark when it's hot to see what's going on with the Zap side.

Thanks, will check both issues.
-Malcolm

 

[heimannm]

The fuel tank vent on the Titan 57 is not in the fuel cap, it is a completely separate line coming from the tank with a breather on the end.


Mark

 

[MDWill]

The fuel tank vent on the Titan 57 is not in the fuel cap, it is a completely separate line coming from the tank with a breather on the end.

(pic deleted)
Mark

Nice pic, Mark! I'll double-check that mine is plumbed correctly - I remember it being a PITA.

 

[Lt1]

Any McCulloch carburetor for sale?

 

[Lt1]

Hello,Im Looking for a HDA-77 carb for a McCulloch titan 50. Anyone have one laying around?

 

[heimannm]

The HDA-77 carburetors are getting hard to find, if I understand correctly they have been snapped up for use on some sort of RC projects or moped modifications.

Mark

 

[sean donato]

We favor the wt or wj series of carb in large scale rc. At least in land and water based rc. The flight guys like different carbs. The hda series is too much of a pain to find, let alone a good working one. The wj 71 is good up to a 90cc engine and you can get it to work pretty decent on a 50-60cc depending on how it's ported. We're pushing about 3 times the power of a saw though.

 

[Old2stroke]

Time to check the compression. Most likely a coil issue, but one of the signs of low compression is a saw that won't start when hot. Also the current problem with my ancient 2-stroke Lawnboy mower.