what starter solenoid do I need for a bendix drive starter?-gctid361956

[yachtman]

I have chevy 350 engines and I want to replace my starter solenoids. The problem is the part # doesn't show on a google search. They are round silver with 2 big posts and 2 small posts. No names or markings. These came off a 1980 marine power engine.

What amp size do I need or does some one have a part #?

[2850Bounty]

What is a Bendix drive starter motor?

[yachtman]

2850Bounty wrote:
What is a Bendix drive starter motor?

Yeah yeah I knew you were gonna dis my beloved bendix drives.

Careful Rick careful I got my mouse on the.negative button and im not afraid to use it.:kidding

Those are new technology starters you probably haven't seen them yet. Lol

[Chief_Alen]

Take it to the nearest auto store they will match it up.

The one in my garage is a # S5049z made by bwd z series . Advance auto.

sq # 7 45321 72645 0

[yachtman]

Chief Alen wrote:
Take it to the nearest auto store they will match it up.

The one in my garage is a # S5049z made by bwd z series . Advance auto.

sq # 7 45321 72645 0

Do they need to be spark protected type? Or are they all the same?

[2850Bounty]

Dave, to my knowledge, these types of solenoid switches are sealed units, but whether certified for marine use or not, you'd have to qualify that with the supplier.

The first two that I show here are Marine and do not necessarily need to mount directly onto the starter motor.



Mall Solenoid9-15108 By Mallory Marine



If the solenoid is to be Starter Motor mounted, the flanges of the Cole Hersee style can be bent to the contour of the motor housing.

The motors are usually drilled and threaded.

Here's a Cole Hersee mounted to a Prestolite Bendix style motor.







Here's some info on starter motor testing, amp load, system voltage drop, etc.

Then after the first year or two of Bendix drive motors, Santa Claus will be bringing you a pair of these.

[Roddy]

Illustration of showing drive engagement solenoid

http://www.delcoremy.com/Documents/Starter-Instruction-Sheets/29MT---28MT-installation-instructions_10511648.aspx

Delco-Remy parts lookup

https://www1.remyinc.com/ecat/publiccat.asp?66b435a2fe=ffske332

[2850Bounty]

Rod, Dave's starter motors are Bendix style.... no magnetic solenoid lever action.

These require a heavy contactor only.







Unlike the magnetic solenoid lever action motors.... no Bendix.

[boatworkfl]

2850Bounty wrote:
Rod, Dave's starter motors are Bendix style.... no magnetic solenoid lever action.

These require a heavy contactor only.







Unlike the magnetic solenoid lever action motors.... no Bendix.

The 1980 starter should have a starter simular to your last diagram, a solenoid and a bendex drive, the bendex drive meaning the spring loaded assy with the gear that engagedes the teeth on the flywheel. I suspect the OP may mean 1 or the other.

If the teeth on the starter drive is worn replace it, replacing the solenoid is easy.

A photo as always goes a long way to solving an issue!

If I am not right, I am close.

[2850Bounty]

Well, the word Bendix sort of carried over when the magnetic solenoid lever action motors came to be.

The today's magnetic lever action kicks the gear assembly out on straight splines, whereas the Bendix gear glides out on spiral cut splines under torque only.

Technically, both style pinion drives incorporate a spraque clutch, but thats' about where it ends.

Odd thing is, the Bendix Co. brand name used to show up on the boxes for the lever action pinion drive........ but as far as I recall, they weren't actually a Bendix drive.

.

[Guest]

Now Im really confused. Rick you say the lever action type slide out on straight splines? Seems to me those splines a are spiralled arent they?ie Delco starters like used on GM for last 40 plus years?

What an I missing here?

[Chief_Alen]

Bendix made all sort of things. Brake calipers and such.

[boatworkfl]

telstar1 wrote:
Now Im really confused. Rick you say the lever action type slide out on straight splines? Seems to me those splines a are spiralled arent they?ie Delco starters like used on GM for last 40 plus years?

What an I missing here?

I believe that you are correct on the sprialed splines. The sprial would help prevent the starter gear from slaming into the raised teeth on the ring gear.

[2850Bounty]

Chief Alen wrote:
Bendix made all sort of things. Brake calipers and such.

Yes, and it gets somewhat confusing when you hear the brand name Bendix being used for either style pinion drive.

What I'm saying is; with the original Bendix drive type starter motor, the pinion was not kicked out into the flywheel ring gear by a lever or a fork.

It kicked itself out via torque from the armature, and did so via the spiral splines within the Bendix unit and/or on the shaft (you'll see several types).

If you've ever bench tested a Automotive Bendix style motor, you'll notice that the pinion does not return itself to the fully retracted position. The shop guys run the pinion against a wire wheel to spin it back in.

The lever action pinion gears are also keyed to the shaft (similar to the Bendix drive) and are kicked into the flywheel ring gear by the solenoid lever/fork.... and are brought back in by the solenoid. No spiral splines required.

telstar1 wrote:
Now Im really confused. Rick you say the lever action type slide out on straight splines? Seems to me those splines a are spiralled arent they?ie Delco starters like used on GM for last 40 plus years?

What an I missing here?

Unless you've worked on both a Bendix drive starter motor and let's say a typical GM Delco style starter motor, you may not be able to see the differences.

Bendix style starter motor.... no solenoid arm/lever action needed to kick the pinion gear out.

The quick enertia from the armature causes the pinion to spin out via the steeply cut spiral splines.

Due to the larger pinion gear, the reduction is not quite as great as with other starter motors.... but armatures are quite large!

Low battery..... often no kick out..... and even if it does engage with low battery voltage, the cranking torque may not be as great.

This motor is a Prestolite, but could just as easily be an Arco or old Delco..... but are considered Bendix style.





Magnetic solenoid lever action starter motor.

No Bendix, other than a possible "Bendix" brand name pinion gear and spraque clutch affair.

[yachtman]

The starter I have is the first starter pictured in post #14. I will admit I don't know why they used that type in 1979-80. Non the lest I have 2 new ones and wanted to replace the solenoids but they have no markings