Funny Starting H , Guesses ?

Super H Mike · Dec 16, 2017

One of my 53 Super Hs has developed a weird starting quirk. When cold, it will only start with the throttle fully closed and no choke. If I advance the throttle or choke it at all it will only spin and spin.. not even a pop, nothing. It is turning nice and fast like always (12 V) This is a new issue, it has always started great with a 1/4 throttle and full choke no matter how cold it is outside. Once it fires up now with closed throttle, if I try to rev it up at ALL, it will kill instantly. Same if I pull the choke at all. So I let it warm up at low idle and then everything is normal. It doesn't stumble or miss at all, and starts fine warm no matter the throttle position. Heavy loaded it never starves for fuel, but I gotta believe it is fuel related. It started acting this way about 2 months ago. I plan to check it out and fix it soon, I wanted to throw it out to you guys for your best guess what makes it do that ! Thanks, So far I haven't touched a thing on it or checked anything.

Steinkamp sales · Dec 16, 2017

When you shut off tractor, try letting it shut off by shutting the gas off at the sediment bowl. Next turn the switch off. Only turn the gas back on just before you start it the next time. You may have carb running over and giving you too much gas at start up. Hope this helps!

Mark (EC,IN) · Dec 16, 2017

I'm betting you have an intake manifold gasket that is leaking.

The next time you get it running and warmed up good spray some starting fluid around the intake, if it surges you have found your problem.

Let us know what you find.............good luck.

Wicksfield · Dec 16, 2017

Did you happen to fuel it up two months ago? Could be some bad gas. I had same symptoms on a 656 which I tried everything to correct the problem with no luck. I've never had any bad gas but as a last resort, I drained the tank and put 5 gallons of fresh gas in it from the corner gas station. Full choke, quarter throttle, fired right up.

Jeff M NY · Dec 16, 2017

Yep I agree. Had this happen on a 666 of mine. Replaced needle and seat, and tweaked the float a little bit and now it is fine. Went for a while like that then it wouldn't run very good at all.

Brownie450 · Dec 17, 2017

Take the air intake hose off where it goes onto
the carb, & see if the choke plate is actually
shutting when you pull the choke lever.

Had one tractor [can't remember which one] that
the screws holding the plate to the shaft came
loose----one screw fell out.
The choke wouldn't shut, & it acted just like
yours on cold starts.
Jim

Bob 7337 · Dec 17, 2017

I bet you have chock problems not closing

DaveBN · Dec 24, 2017

Mike, sorry for the late post but I've been busy. I had the same problem with a "new to me" BN. Baffled me for over a year then the governor failed and I rebuilt it. It now starts normally. Can't explain it but the governor rebuild fixed it.

Dave

Funny Starting H , Guesses ?

Super H Mike

Member

Steinkamp sales

Member

Mark (EC,IN)

Member

Wicksfield

Member

Jeff M NY

Member

Brownie450

Member

Bob 7337

Member

DaveBN

Member

Similar threads