Hyster S50XM:
engine fighting starter (bucking when cranked)

I was wondering if anyone has had this problem. I have had 3 hyster s50xm's now all with the mazda engine and spectrum fuel system in them do this. when cranking its like it tried to fire backwards and bucks but once fired it runs great. I have figured out with no fuel in the system it cranks normally (eliminating starter and ring gear). I have even had a known good running truck right next to the bad one and swapped distributor, fuel converter, many other parts with no change and im at a loss. I would like to solve this as one truck does it so bad it eats up starters every few months
  • Posted 6 Apr 2017 10:24
  • Discussion started by vashxj
  • illinois
Showing items 1 - 3 of 3 results.
If the power feed wire to the distributor or coil is dropping out for a even a split second it's going to cause it to spark at the wrong time. Notice if you just turn the key on and off without starting on that type of ignition system it causes a spark. Maybe if that circuit has a problem it is throwing a spark at the wrong time.
  • Posted 6 Apr 2017 20:03
  • Reply by mrfixit
  • New York, United States
Thanks for the reply, I have checked voltage it usually never drops below 10.5 at most and has gotten a new battery before. I thought about the amp draw too; it has new starter, ignition switch, and bat cables. I even added in a relay on the starter wire so it has direct power not going through all the safety switches. With no tank hooked up This thing cranks like crazy and sounds normal. This is a rental unit so I have had a lot of time with it. Have also gone through the timing a few times. Even got a new head from the possibility that it had been machined down to far and screwed up compression. Almost wondering if it's a controller issue, I don't see a ignition relay like they have on the gm 3.0s and there is not to many Mazda hysters running around
  • Posted 6 Apr 2017 13:25
  • Reply by vashxj
  • illinois
check the timing
and also check the volt drop on the battery and amp draw on the starter while cranking
  • Posted 6 Apr 2017 12:50
  • Modified 6 Apr 2017 12:52 by poster
  • Reply by swoop223
  • North Carolina, United States
You've been swooped!

Having trouble using the Discussion Forums? Contact us for help.

Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.


Combilift MR2
United States Pennsylvania
Canada Ontario

Featured Business

VETTER Industrie GmbH
The world's most comprehensive range of forks and the most intelligent sensor fork for more safety and efficiency.

Latest Jobs

Huddersfield, Manchester, Castleford, United Kingdom
Louisville, KY, United States
Oklahoma City, Oklahoma, United States
Odessa, Texas, United States

Next Editorial Features


Inside Forkliftaction

There's some optimism about the global economy from one of the world's leading banks, Deutsche Bank.
The bank's chief investment officer for Private Banking, Christian Nolting, is tipping mild recessions in Europe and the US for 2023, "but improving dynamics in Asia where supply chains are all but resolved". ...Continue Reading
HC Forklift America Corporation (HCFA), a wholly-owned subsidiary of Hangcha Group, is excited to announce the XH Series High Voltage Lithium-ion Pneumatic Forklift with a 26,000-36,000lb load capacity.
BSLBATT, a fast-paced, hi-tech company focused on advanced lithium-ion technology solutions, recently announced the order for Yale, Toyota Jungheinrich, Nichiyu and Still forklift batteries for a leading forklift dealer.

Upcoming Events

February 7-9, 2023 - Long Beach, California, United States
February 20-21, 2023 - Sydney, Australia
March 14 - 15, 2023 - Hamburg, Germany
March 28-29, 2023 - Coventry, United Kingdom

Fact of the week

The People's Choice Word of the Year 2022 as announced by Macquarie Dictionary was decided by Australia as "bachelor's handbag". The term refers to a takeaway roast chicken, often packaged in a small plastic bag with a handle which resembles a handbag. As it is prepared for immediate consumption, often favoured by a single person, it received this humorous colloquial name.
Reutlingen, Germany KION Group is planning a multi-million Euro expansion of its Reutlingen production facility. “By expanding the production by some 60%, we are sending an important message about the future...
Wauconda, IL, United States Industry association MHEDA is losing its CEO, with Liz Richards announcing that she will retire at the end of next year. “When I was first hired to run this...

Your Focus

Stuart Taylor
Stuart Taylor

Movers & Shakers

chief financial officer
Exotec, United Kingdom
vice president of operations
Flux Power, United States
president, North America
CNH Industrial, United Kingdom
Manager - Latin America
CHN Industrial, United Kingdom