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Unread 05-15-2013, 08:06 AM   #181
82JeepCJ7
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That ethanol crap does some funky stuff to plugs... Avoid it at all costs!

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Unread 05-15-2013, 08:18 AM   #182
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Quote:
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That ethanol crap does some funky stuff to plugs... Avoid it at all costs!
Odd...I have no other choice but to run ethanol blends around here. I haven't noticed any funkiness on my plugs.

The thing that did leave some residue was SeaFoam. I ran a bunch of that thru my gas tank when I first pulled the Ol' Girl out of the barn.

Here's what that looked like.

Matt
plug1.jpg  
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Unread 05-15-2013, 08:26 AM   #183
82JeepCJ7
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Quote:
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Odd...I have no other choice but to run ethanol blends around here. I haven't noticed any funkiness on my plugs.

The thing that did leave some residue was SeaFoam. I ran a bunch of that thru my gas tank when I first pulled the Ol' Girl out of the barn.

Here's what that looked like.

Matt
Have you looked here? http://www.pure-gas.org/index.jsp?stateprov=CO

Being that we are so close to the water here, with most outboard motors, if you run fuel with ethanol in it, it voids the warranty. So, its still sold all over the place.
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Unread 05-15-2013, 08:57 AM   #184
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82,

I'd burn a 1/2 tank of gas just getting to the nearest non-ethanol station. It's just not practical.

Besides, the premium ethanol crap seems to burn just fine in my heap. The plugs I posted pics of were on nothing but.

Sorry for the derail, Xtreme. I'm looking forward to your update, after your new toys come in.

Matt
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Unread 05-15-2013, 09:07 AM   #185
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I'm looking forward to your update, after your new toys come in.
Matt
Thanks.
Looking forward to seeing the results, myself.

And who doesn't like getting toys???
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Unread 05-15-2013, 01:39 PM   #186
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I agree with the ignition first too. And ignition problems mask carb problems.

However, that carb needs jetted down. And carbon buildup in the combustion chamber and or carbon buildup on piston crowns could be a source of detonation as easily as it being from a timing event.
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Unread 05-15-2013, 05:03 PM   #187
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WELL....!
I didn't expect to see THAT!

Used 3/4 of a can of carb cleaner looking for vac leaks and found NOTHING...!

Put the vac gauge on it and it read a STEADY 18.5 - 18.75....

Good stuff, right?

Thoughts?

(Trying to upload the vid from my phone but having trouble.)
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Unread 05-15-2013, 05:26 PM   #188
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Timing check next. If it looks standard and not aggressive I'm thinking excessive carbon Buildup

Make sure flyweights are not sticking also.

Then rejet
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Unread 05-15-2013, 05:30 PM   #189
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Sounds like your vac system is pretty healthy. That scratches leaks off the list.

Crack open that timing light box....

Matt
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Unread 05-16-2013, 06:02 AM   #190
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Picking up a timing light tonight from Advance or somewhere.

Here's the video. Finally got it uploaded.
Doesn't get much steadier than this:

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Unread 05-16-2013, 06:28 AM   #191
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That looks great, I hardly saw a flicker in the needle.

Be aware, that a decent vac reading at idle doesn't guarantee the engine is leak-free, but it does eliminate a major leak from the list. The steadiness of your vacuum indicates the guts of your engine is all working well.

I've been using this timing light, from Autozone, for the last 2 years, and it's worked well. The advance feature helps a bunch when checking the centrifugal curve.

Matt
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Unread 05-16-2013, 06:43 AM   #192
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When I played that vid back on my phone with no volume, I thought I accidentally took a photo instead of video... lol

Couple questions on setting timing using a timing tape.

According to MSD's website:
"Align the 0 mark on the tape with the TDC mark on the
balancer."

But if my thinking is correct, this doesn't take into account any stretch in the chain. It only gives you a more visible mark, with a higher 'tolerance' - which may already be off in relation to the mark on the block. Maybe the above quote is for setting timing on a new/ rebuilt motor(?).....

I thought the process was:
Find TDC of #1 cylinder
Align tape on balancer so that '0' is aligned with mark on block.
Set timing from there.

Straighten me out please....
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Unread 05-16-2013, 06:46 AM   #193
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Finding TDC ... again
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Unread 05-16-2013, 06:53 AM   #194
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Finding TDC ... again
OOPS!

Thanks...... again
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Unread 05-16-2013, 10:48 AM   #195
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OK, I reread the information in the Finding TDC link above. And pretty much understand it.

One thing I am unclear of in that info is, if I don't know where TDC is, how do I know where "roughly 20 degrees before top dead center (BTDC)" is?

Also, when installing the timing tape, how do I locate it on the dampener?
Place '0' on the tape at the TDC mark that was determined by splitting the two marks per the instructions in Shawn's link?
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