Forum Home
PC World Chat
 
Thread ID: 148081 2019-07-15 04:03:00 A question for PREFECT. Slow starter. mzee (3324) PC World Chat
Post ID Timestamp Content User
1462345 2019-07-15 04:03:00 I have 3 HT51s 1.3 litre Suzuki Swifts. Two of them have fast starter motors, and the third has a slower starter motor.
All three have new batteries.
Some Swifts have 10 tooth pinions, and others 12 tooth pinions, I don't know what pinions are in these cars. The starters look the same from outside.
The 10 tooth pinion may increase the starter motor speed, and conversely a 12 tooth pinion could maintain the same cranking speed at less starter RPM.
Any ideas?
mzee (3324)
1462346 2019-07-15 19:06:00 I have 3 HT51s 1.3 litre Suzuki Swifts. Two of them have fast starter motors, and the third has a slower starter motor.
All three have new batteries.
Some Swifts have 10 tooth pinions, and others 12 tooth pinions, I don't know what pinions are in these cars. The starters look the same from outside.
The 10 tooth pinion may increase the starter motor speed, and conversely a 12 tooth pinion could maintain the same cranking speed at less starter RPM.
Any ideas?

Starters in Jap cars have reduction gears in them, that is why you can buy a modified Toyota Corolla starter motor at Auto Electrical spares to fit to a 454 V8
prefect (6291)
1462347 2019-07-15 22:02:00 .
The 10 tooth pinion may increase the starter motor speed, and conversely a 12 tooth pinion could maintain the same cranking speed at less starter RPM.


?
12 tooth will give faster cranking speed , all things being equal . A bigger pinion doesnt determine the speed the actual starter motor spins at (assume it has enough power)

May be irrelevant anyway. Starter motor has to be designed for that particular motor. A bigger smaller pinion starter may not fit properly
1101 (13337)
1462348 2019-07-16 07:28:00 I worked for a while at Auto Electrical spares as a machinist and starter motor person. If you worked there a while you could get promoted to alternators but I didnt. We would get get faxes from North Cape to Stewart Island even Chathams. The fax would have the following information:
Voltage we only had 12v corolla ones
Side which the terminal post was on
Flange size showing bolt holes
Pinion teeth number and external diameter
Pinion throwout distance (most important)
They all got a starter motor from a Toyota Corolla bought from wreckers in the USA for wether it was for a small stationary engine or huge V12.
We fitted a cast aluminum (cast in Thailand) adapter which we machined to fit the flange size and bolted on the front of the starter in place of its original one.
We fitted new Chinese bearings, new boots made in Yugoslavia, metal parts were zinced in the shop, used a grey spray can to paint the casing.
I dont really know how much difference pinion number teeth would make. I would prefer it to turn slower as it would have more torque (I think)
prefect (6291)
1