Cub won’t start unless roll starting

Duwop · Postby **Duwop** » Tue May 11, 2021 3:05 pm

Eugene- I thought I read it in the Service Manual could be mistaken I did the compression test Dry and know the manual says 120 lb but they figured that was a new engine and my 80-85 lb is low.

Don McCombs- so I put the D21 plugs in you recommended I also went ahead and changed the points. Tractor started right up twice and I’ve shut it down. Carb is leaking but new one will be here tomorrow and I’ll take care of it. Since I’ve got to pull the carb back off I’ll check and adjust the valves. Thanks for your help I’ll post some more as I work through them.

Postby **Don McCombs** » Tue May 11, 2021 3:53 pm

Where does the carb seem to be leaking from?

Duwop · Postby **Duwop** » Tue May 11, 2021 3:54 pm

Bottom of bowl plug

Postby **Don McCombs** » Tue May 11, 2021 3:56 pm

Did you check the float settings yet?

Duwop · Postby **Duwop** » Tue May 11, 2021 5:31 pm

Yes I adjusted it but where the plug go into the bottom of bowl the threads are no good causing it to leak. I thought about taping it out and putting a bolt in it.

Postby **Bob McCarty** » Tue May 11, 2021 5:38 pm

Duwop wrote:Yes I adjusted it but where the plug go into the bottom of bowl the threads are no good causing it to leak. I thought about taping it out and putting a bolt in it.

The drain plug is pipe thread, so I think PTFE (teflon) tape around the plug would work better than switching to a bolt.

Duwop · Postby **Duwop** » Tue May 11, 2021 6:50 pm

Ok I’ll give it a try first thing tomorrow and let ya know

Duwop · Postby **Duwop** » Wed May 12, 2021 9:42 am

Don McCombs wrote:Did you check the float settings yet?

Don, so I’ve got access to valves for adjustment and I’m unable to get feeler gauge in between so it looks like I need to lower it to gain 013 but it doesn’t seem to want to go in that direction the other (up) yes, please share your thoughts
I’ve been able to start and run the tractor 4 times but it seems to have a loud tick or slap at #1 cylinder that it’s never had until this year.

Duwop · Postby **Duwop** » Wed May 12, 2021 9:49 am

Yeah that’s been done (float adjustment)

Duwop · Postby **Duwop** » Wed May 12, 2021 9:56 am

Do I adjust both valves for each cylinder?

Postby **Don McCombs** » Wed May 12, 2021 10:06 am

Valve adjusting procedure is on page 1-15, in the GSS-1411 Blue Ribbon Manual in the PDF Manuals section.

Postby **Bob McCarty** » Wed May 12, 2021 10:08 am

A "how to" on valve adjustment: viewtopic.php?f=141&t=46322 or viewtopic.php?f=141&t=15503

Duwop · Postby **Duwop** » Wed May 12, 2021 10:21 am

Found info in how to section on valve adjusting Thank you anyway

SONNY · Postby **SONNY** » Wed May 12, 2021 11:21 am

Your tick could be piston slap or one valve really loose on that cylinder. could also be wrist pin bushing wear or rod bearing getting worn. ---- use a screwdriver or steth. to see if the noise is down low or up high on the block, also which side of engine it's the loudest. sometimes that can help pinpoint the area of noise.
For the screwdriver method, hold the screwdriver to the block, then put your ear on the handle and you should be able to hear all kinds of strange noises in there! I use a regular mechanics steth. here ---- a REAL handy tool to have!

Duwop · Postby **Duwop** » Wed May 12, 2021 2:26 pm

Sonny, so the noise is on the left side only, I got a stethoscope but couldn’t determine where sound was coming from.
The valves have been adjusted now and weren’t off by much at all.

Farmall Cub

Cub won’t start unless roll starting

Re: Cub won’t start unless roll starting

Re: Cub won’t start unless roll starting

Re: Cub won’t start unless roll starting

Re: Cub won’t start unless roll starting

Re: Cub won’t start unless roll starting

Re: Cub won’t start unless roll starting

Re: Cub won’t start unless roll starting

Re: Cub won’t start unless roll starting

Re: Cub won’t start unless roll starting

Re: Cub won’t start unless roll starting

Re: Cub won’t start unless roll starting

Re: Cub won’t start unless roll starting

Re: Cub won’t start unless roll starting

Re: Cub won’t start unless roll starting

Re: Cub won’t start unless roll starting

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