So what'* the determination? Will the larger (less expensive) starter fit in the SSEi? I'm going to have to replace mine eventually, and it'd be nice to know in advance, rather than having to find out the hard way.
Thanks.

From what i understand, you need to use the proper starter for the model, but if it'* just a solenoid problem then you can inter change them,

The larger starter (gear reduction) does fit and Randy is using it. Works great and helps his car start better than the old starter.

Actually, the smaller [diameter] starter is gear reduction unit. The larger starter worked well for over a year in my SSEi. If the housing wasn't cracked, I would have just changed the solenoids and continued to use it. So I guess the answer is yes, you can use either starter in an SSEi.

Thanks for clarifying that. I'm sure other SSEi owners will be glad to know that also.