Fuel consumption - Page 4

tsubaki · #1 10-16-2007, 08:22 AM

That is what I found out about those type plugs in the past.
That is what the book suggested and they were a pain to find here in town.
I'll cross reference the other type and put them in.
I think I had L77JC4 plugs in during the last run, they performed about the same.
Got two carb kits yesterday and the other should be in town Thursday.
Not knowing any real history of the motor rebuilding the carbs will at least give me some piece of mind.
All the coils, wires and one powerpack appear new. The best indication I get out of this motor is it had some problem and they did several things to it to try and improve it.
The thermostat covers have been removed and resealed. One temp sensor had been cut and respliced but not removed, come to find out it was defective. I have all ideas the thermostats are missing. That will be my next venture cause the engine isn't getting much past luke warm.
One more step at a time. :-/

THEFERMANATOR · #2 10-16-2007, 09:50 PM

If you don't have T-stat's, it will always foul plugs at slow speed's. Been there, done that. T-stats are vital to keeping these engines from fouling. Most people overlook them. Also do the bypass valves and springs while your there.

tsubaki · #3 10-17-2007, 08:15 AM

Thanks Theferm, at least I got some ideas now of the possible problems. To top things off I never checked the plug gaps on the L77JC4 plugs, come to find out they were between 25-32 instead of 40 like recommended.
Cleaned and replaced floats and valves in two of the carbs yesterday and found no real contaminations.
Had water lines on two of the floats but no evidence of varnish.
Waiting on the last carb kit.
Might remove the t-stat covers today.

bigshrimpin · #4 10-17-2007, 01:46 PM

Yikes that motor is running rich. Paper bag brown is the color you want.

tsubaki · #5 10-17-2007, 06:12 PM

Removed the thermostat covers and they are in there.
Going to replace them (& bypass)when they show up.
Also going to run the L77JC4's when I reassemble what I've removed to do this.
Any ideas of all the fouling or running rich? Anybody?
The two "cleanest" ones came from the two top cylinders, the rest were about the same.

THEFERMANATOR · #6 10-17-2007, 09:54 PM

What does your airbox look like? Is it gummed up inside? You may also want to change out your recirc valves while your in there.

tsubaki · #7 10-17-2007, 10:14 PM

The intake (flame arrestor) is damp, oily (but not gummed) like most I've seen. Easy to wipe off.
And the recirculating valves? If it's the ones in the thermostate covers, yes planning on changing them.

THEFERMANATOR · #8 10-17-2007, 11:53 PM

The valves I'm refferring to are the ones that screw in by the carbs and attatch to hoses that run back and hook in by the cylinders. They are mostly for slow speed operation, but it may help.

tsubaki · #9 10-18-2007, 07:32 AM

I'll look at those before I put the carbs back on.
If you hadn't suggested it I wouldn't have fooled with them.
Thanks

And 4 more below them, not to meantion the feeder.

tsubaki · #10 10-18-2007, 08:35 PM

My mistake, they's 8 total plus the one going to the air damper (intake, breather, airbox, flame arrestor).
2 sets of 4 each are connected together and 1 to the airdamper.
The one into the airdamper was clogged and one to the set of 4 to the upper bodies was clogged.
BACK ORDERED is the last carb kit. Probably Monday.