Running a 12 volt starter at 24 volts

[jstew0903]

I am changing to a different battery setup. I can fit 2 of the 7mah batterys in the spot of my other starter battery(home depot interstate lawnmower battery). I thought about wiring them 24v instead of 12v. Would it be better to have more amps than volts? Has anyone tried to use the hobbico starters with 24 volts? I am planning on buying one of the dynatron 24 starters but I wont be out much if this one will last a little while. I have problems trying to start a .45 ops inboard. Is it worth a try or will it burn up fast.

Jason Stewart

 

[oldlugs]

I am changing to a different battery setup. I can fit 2 of the 7mah batterys in the spot of my other starter battery(home depot interstate lawnmower battery). I thought about wiring them 24v instead of 12v. Would it be better to have more amps than volts? Has anyone tried to use the hobbico starters with 24 volts? I am planning on buying one of the dynatron 24 starters but I wont be out much if this one will last a little while. I have problems trying to start a .45 ops inboard. Is it worth a try or will it burn up fast.

Jason Stewart

Do it. I just built my starter box to go with either/both 12/24. I'm using a cheap, unknown brand starter (used - $2 from yard sale), and the speed and torque is amazing on 24V... You can see my starter box in the old gallery HERE.

Duane

 

[CMBrunner]

I am changing to a different battery setup. I can fit 2 of the 7mah batterys in the spot of my other starter battery(home depot interstate lawnmower battery). I thought about wiring them 24v instead of 12v. Would it be better to have more amps than volts? Has anyone tried to use the hobbico starters with 24 volts? I am planning on buying one of the dynatron 24 starters but I wont be out much if this one will last a little while. I have problems trying to start a .45 ops inboard. Is it worth a try or will it burn up fast.

Jason Stewart

Should have no problems.....usually, the contact switch on the starter will be the first thing to fail.

Also, I would recommend incorporating a switch so you can go back to 12v for starting the little 21's

though.....24v can really do harm to the motors if you are not careful.

 

[Ron Olson]

I've been told that you can do it but not to crank them over for more than 15 seconds at a time then letting the starter cool down. Rarely do you need to run it for 15 seconds unless you have a grumpy engine.

 

[jstew0903]

Cool I'll thanks for the help. I like the field box you built also Duane. Looks great. I will make switchable from 12 to 24 volts. Glad you mentioned that I wouldnt of thought of that until later. I have a heavy duty momentary switch from a big ac panel I was going to use for the starter. It is like the one on the speedmaster box but has a rubber cover on it.

Jason

 

[topfuel443]

I used a hobbico starter for 3 years on 24 volts. No problem.

~James

 

[oldlugs]

Cool I'll thanks for the help. I like the field box you built also Duane. Looks great. I will make switchable from 12 to 24 volts. Glad you mentioned that I wouldnt of thought of that until later. I have a heavy duty momentary switch from a big ac panel I was going to use for the starter. It is like the one on the speedmaster box but has a rubber cover on it.

Jason

Thanks, Jason. For the starter I chose to use simple wiring and two sets of posts, rather than switching from 12/24. That way, I eliminate potential switch troubles. I can use each 12V seperately, or the 24V by connecting to only the outer posts.

I'm still thinking of building a glow driver circuit board to go in next to the batteries (plenty of room), and installing an RCA phono jack for a twist lock glow plug clip. I've found a couple of different glow circuits on the web, and it's pretty easy to etch, drill and assemble a circuit board. Here's some INFO. If I find one of shallow depth, I may even have room for a small glow circuit ammeter. For a simpler, trouble-free glow driver, I could just put in a few C or sub-C size cells wired in parallel... I may go that route.

Duane

 

[steve wood]

i blew the windings off 4 new starters from horizon hobbies, in about 2 weeks. bought 2 new high tork sullivan 12 /24 (1998) and they are still working fine. we use 7 amp x 2, 12 volt gell cells.

 

[Bob Howard]

You might want to look at the Hobbico MicroPanel Plus Pro series. http://www2.towerhobbies.com/cgi-bin/wti00...=LXWX80&P=0 I put one of these in my new starting box I just built. This unit is very small and fairly thin.

Bob

 

[Preston_Hall]

I am with Steve. My Sullivan did not last 5 seconds before the windings flew out.

 

[pitboy]

I'm still thinking of building a glow driver circuit board to go in next to the batteries (plenty of room), and installing an RCA phono jack for a twist lock glow plug clip. I've found a couple of different glow circuits on the web, and it's pretty easy to etch, drill and assemble a circuit board. Here's some INFO. If I find one of shallow depth, I may even have room for a small glow circuit ammeter. For a simpler, trouble-free glow driver, I could just put in a few C or sub-C size cells wired in parallel... I may go that route.

Duane

There is a much simpler design around for a glowplug driver that uses only a LM350, 240 ohm resister, 500 ohm pot., and an ammeter. Very simple and reliable.

 

[WIDEBOY]

I have being using one for 2 1/2 years on 24volt no problem.

 

[jstew0903]

Thanks for the help everyone. I am going to get another battery and try it. I will make it to where it is switchable between 12 and 24 volts.

Jason