Rochester 4MV choke

[triman]

Running a 1991 350 Chev to a yamaha sterndrive.
The choke is not operational - it's the "divorced" type with the bimetal element in a well on the inlet manifold.
So I'm considering trying to make it an electric choke.
Now, outboards with the "push-the-key" choke don't have any heat sensing gizmos that I can find. Push the key, choke on, release the key - choke off.
So why can't I just use a simple solenoid actuator on the 4MV, connected and controlled by a push-button switch, to achieve the same effect as an outboard choke?
All comments appreciated.

 

[jy118lfd]

Re: Rochester 4MV choke

You need an electric choke coil made to be mounted where the hot air divorced choke is now. At the bottom of this page.

CU 445 is the part no. for small block chevy
http://www.carburetion.com/quadrajet.asp

 

[zbnutcase]

Re: Rochester 4MV choke

Never seen that before....wonder how long it would last in a marine app. 'nutcase

 

[Bifflefan]

Re: Rochester 4MV choke

I cant belive there is a direct replacment in elestric for those antique chocks. I tought they stopped using those in the 70's.
Well i guess they did judging by the date they replace...

 

[triman]

Re: Rochester 4MV choke

Okay, so can someone tell me why 2-stroke chokes are so simple, being key push and no temp sensor gizmo, yet 4-stroke chokes seem to be unnecessarily complex?

 

[jy118lfd]

Re: Rochester 4MV choke

They are really not more complicated just more refined. They come from cars where you wanted a set and forget mentality. On a two stroke motor which is usually used in warmer weather it does not need to be on for as long. It might work with a solenoid but there is something out there to fix your problem with out reengineering anything.

 

[mkast]

Re: Rochester 4MV choke

yet 4-stroke chokes seem to be unnecessarily complex?

Define complex, if the choke is operating normally, the operator moves the throttle to wide open throttle once, to set the choke.

 

[triman]

Re: Rochester 4MV choke

Define complex, if the choke is operating normally, the operator moves the throttle to wide open throttle once, to set the choke.

Complex to the extent that I look at my Rochester and there are rods, linkages, "E" clips and levers all over the right side, as well as the rod tucked away inside.
Then I take the lid off an old 85 Johnno out the back and there's one solenoid, a rod heading upwards and that's about it.