Ford 302 spark plugs

[Jakem]

The plugs that came with the boat are autolite 123. Is this the appropriate plug or shoukd I change them. Carborated...petronix ignition...

 

[Bondo]

Ayuh,..... Autolite IS a Ford plug,.....

Donno the heat range,...... Run 'em, 'n check their colors,....

 

[Jakem]

Here are the plug colors. They are all the same

 

[Jakem]

Another

 

[Bondo]

Ayuh,..... Looks really lean, detonated the corners off the electrodes,.....

 

[Jakem]

So what's the fix

 

[dubs283]

So what's the fix

Check/adjust timing, ensure carburetor is clean/adjusted/jetted properly, ensure fuel pump pressure is correct at all RPMs/under load

 

[Jakem]

I got snooping around in there and I found the vaccume port bottom of carb were pcv line runs was really loose. Not only the hose but the brass fitting as well

 

[Jakem]

Fuel pump..carb...all new..everything new

 

[dubs283]

I got snooping around in there and I found the vaccume port bottom of carb were pcv line runs was really loose. Not only the hose but the brass fitting as well

Fuel pump..carb...all new..everything

Good catch, that is a direct vacuum leak and would cause a lean issue

It's great you have new fuel system components however you must ensure they are correct for your engine and properly adjusted. Again, have you checked/adjusted the timing? Would guess idle timing for your engine is 10 degrees BTDC

 

[Jakem]

It is 10 btdc...I will now check carb and timing now that it ain't sucking a bunch of air...and or not

 

[achris]

The plugs that came with the boat are autolite 123. Is this the appropriate plug or should I change them. Carborated...petronix ignition...

According to my Merc manual, 888 and 215 (both use the Ford 302 engine) should be running ACDelco CR83T, Motorcraft BTF-3M or Autolite 124 for earlier heads (18mm plugs) and ACDelco MR43T, Motorcraft ARF-3 or Autolite 145 for the later heads (14mm plugs)...

Not sure why Autolite 123s are in it, and they don't correspond to anything. Plugs shouldn't need to be altered when adding electronic ignition.

Chris.......

 

[Jakem]

They are 18mm plugs...so in your opinion what's the best plug..

 

[Jakem]

Good catch, that is a direct vacuum leak and would cause a lean issue

It's great you have new fuel system components however you must ensure they are correct for your engine and properly adjusted. Again, have you checked/adjusted the timing? Would guess idle timing for your engine is 10 degrees BTDC

I'm not sure what yellow clear hose you are talking about. I do know that off my pump should be a hose yes. I am talking about hose from valve cover pcv to carb base was loose

 

[achris]

They are 18mm plugs...so in your opinion what's the best plug..

According to my Merc manual, 888 and 215 (both use the Ford 302 engine) should be running ACDelco CR83T, Motorcraft BTF-3M or Autolite 124 for earlier heads (18mm plugs)

Chris.......

Personally, I use NGK... For your engine, that would be NGK AR6FS.

Take you pick....

 

[dubs283]

I'm not sure what yellow clear hose you are talking about. I do know that off my pump should be a hose yes. I am talking about hose from valve cover pcv to carb base was loose

Yeah, that was my misreading of your post regarding the vacuum line at the carburetor base. Thought I read fuel pump vacuum line (which does not exist) and thought of the diaphragm rupture safety hose.

Past post edited.

You can run any brand plug you like, just make sure it's the correct plug. In my fords I always use autolite/motorcraft brand

 

[Jakem]

My mistake..they are autolight 124

 

[Jakem]

Alright put fresh plugs in...timing still at 10 btdc...I've reset carb and got it as close as I can...how much.of a run on these plugs before I check colours

 

[Jakem]

Alright put fresh plugs in...timing still at 10 btdc...I've reset carb and got it as close as I can...how much.of a run on these plugs before I check colours

Vaccume gauge reading about 17/18

 

[dubs283]

Do a plug burn at various RPM. The newer the plugs the easier they are to read