Skip to main content ↑ ↓
Topic: ISM starter (Read 2367 times) previous topic - next topic

Re: ISM starter

Reply #20 –
So Peter you bring up a point I had not addressed. My three group 31 batteries were new may 2020. My cables are in good condition and were modified to ring lugs and 3/8 battery posts with nuts. Ive never used the Boost solenoid since I left Arkansas when I picked up my coach. It has always started well and the coldest temperature down to 22.0  deg F without preheating engine. I was curious and very surprised with its low temperature starting. IMO if your needing boost to start something needs to be addressed. Extreme low temperature, weak batteries, poor cables, grounds, failing starter, air leak in fuel?
I'm guessing it is, always best to check with Cummins

Cummins QuickServe Online

Delco Remy 8200308 Genuine Starter Motor - 39MT 12V - New No Box | eBay
 Currently no stock

Re: ISM starter

Reply #21 –
Mine started at at 21 F this morning with no heat. It took a few more revaluations
than usual. Lower than 14 F I give it heat. At below 0 one hour seems to be enough
from the Aqua-hot.

Re: ISM starter

Reply #22 –
This morning it is -8 C  17.6 F and I noticed the start batteries were at 12.2 and as it
wasn't starting and I hit the boost switch and it started right away. My house batteries
was higher than my start batteries which never happens so maybe the start batteries
are starting to fail or there is a draw on them. The start batteries are usually at 12.8
before starting.

Re: ISM starter

Reply #23 –
Parasitic draw on the start batteries on most vehicles and I don't think our coaches are the exception.
 

Re: ISM starter

Reply #24 –
I think I found the problem with my start batteries, they were dirty on top and I think
that was what was discharging my batteries. I haven't done a voltage check on the top
of batteries for years but I was getting over a volt and a half on the top of my batteries.
I will know for sure when I go to Whistler next.