Dave's 1650 Project - Page 49

ACecil · #**481** 10-29-2011, 11:13 PM

That's awesome news, Dave!

Sugarmaker · #**482** 10-29-2011, 11:27 PM

Dave,
Congratulations! You win! Great to hear its running!
I may have to try mine for the first time tomorrow.
I think I need to put gas in it

OK may some more tinkering with the exhaust first.
Regards,
Chris

BIGMOZEKE · #**483** 10-30-2011, 09:51 AM

Congratulations Dave.

Can't wait to see the complete tractor pics.

Joe

CC1650Dave · #**484** 10-30-2011, 10:35 AM

Man, the cold start is really rough today. I've got gas coming out of the carb, one small fire in the throat of the carb, a few backfires, and no start yet.

Carb is at the Kohler standard settings for today's try, 3.5 turns on high, 2.5 on idle.

I'm thinking this may be a timing problem with the hard starts? I'm dead on according to the static method though. (???) It ran pretty smooth once warm last night...

CC1650Dave · #**485** 10-30-2011, 10:56 AM

I found this in one of Matt G's posts:

Quote:

Does the tractor start hard and/or spit through the carb while cranking? If so...improper timing.

So if my timing looks to be dead on using the static timing method, how do I reconcile this?

Also, some other thoughts: The points are new, I used the ones included with the aftermarket rebuild kit. It did not come with a condenser, so my old one is on there. I am also using the same coil and spark plug wire that it had when I got it.

I wonder if any of these could be causing the problem?

CHWNY · #**486** 10-30-2011, 11:24 AM

Hey Dave You will most likely get lots of advise on what is the cause of the hard starting issue. Here's my take. How did it start the first time? Did you let it warm up good? You should go over and re-torque all the fasteners. Check and clean the points AGAIN. look at the plug (coulda got a bugger on it). The carb adjustment could be problematic to diag. usually that indicates internal leakage or restriction. Did you remove the welch plugs? Is the main jet seated good? Just cover all the basics. you have done a lot of work here and its easy to over look small details. If issues still exist than you might need to tear into it more. Be patient.

Matt G. · #**487** 10-30-2011, 11:38 AM

Well for starters, you have the carb set way too rich. Main needle should be about 2 1/8 to 2 1/4 turns out, and the idle about 1 3/4 for starters. You can fine tune that once you have it running. You're probably flooding it, and that would explain why it's spitting gas. The fact that it wants to start at mid throttle seems to support that, too.

Did you run some paper through the new points to wipe off the oil?

CC1650Dave · #**488** 10-30-2011, 12:20 PM

Quote:

Originally Posted by Matt G.

Well for starters, you have the carb set way too rich. Main needle should be about 2 1/8 to 2 1/4 turns out, and the idle about 1 3/4 for starters.

I did try your settings once last night, and I don't recall whether it made any difference or not on starting ('cause once it warms up, everything is easier and I don't remember when I tried these settings.)

I was following the Kohler service manual, which has specific settings for each of the K-series engines. Why do you figure these numbers are off? Changes in gasoline since the manual was written?

Just to check, your numbers are the same for a 12, 14, and 16 hp?

Quote:

Did you run some paper through the new points to wipe off the oil?

Nope, never read anything about that step that I can recall. Good tip, I'll give it a try.

CC1650Dave · #**489** 10-30-2011, 12:24 PM

Quote:

Originally Posted by CHWNY

How did it start the first time? Did you let it warm up good?

Yeah, the first time was rough as well. I did let it warm up, and it started easier after that, but still not great.

Quote:

You should go over and re-torque all the fasteners. Check and clean the points AGAIN. look at the plug (coulda got a bugger on it). The carb adjustment could be problematic to diag. usually that indicates internal leakage or restriction. Did you remove the welch plugs? Is the main jet seated good?

Which fasteners are you talking about re-torquing? Head bolts?

I'll go clean the points and check the plug.

What's a welch plug? Not something I recall reading about...

I'll check out the carb some more as well. I did a half-hour dip on it when I cleaned it, but I'm not sure I ever completely inspected all of the holes to assure they were completely clean.

Thanks for the tips!

Matt G. · #**490** 10-30-2011, 01:08 PM

I have always started with those numbers and then adjusted from there. Years ago someone on another forum pointed out that the manual settings are generally too rich, and I've found that's typically the case with the engines I have had.

However, the fact that you can turn the needles quite a ways in either direction with minimal effect suggests something may be blocked in the carb and it might instead be too lean instead of too rich. It should be pretty responsive to mixture changes.