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Measured about 1 3/8" from rear of 1/2" plate to front of starter ring gear teeth. That's on my RV-3B with 2.85:1 PSRU.
On starter that I think I used with my 2.17:1 PSRU I measured about 1 3/4" from starter mount surface to front of (retracted) pinion gear. Eyeballing 3/16" to 1/4" between retracted pinion and ring teeth.
Wrong counterweight?
Or, I think that maybe a different ring gear (plate) is used for the 2.17:1 than for the 2.85:1.
Someone here correct me, or I can dig into the manuals for each.
What are your measurements?
Finn
On 11/11/2025 10:55 AM, David Walker drw.aa@hotmail.com wrote:
Hi all,
Hoping someone can unravel this mystery about why my starter does not fit the RD1 assembly.
I have the Referenced the same instruction manual and re-ordered the correct starter which is for a 1988 non-turbo manual transmission.
Upon doing a dry fit of everything, the result is that the starter is too short to reach the ring gear, as pictured.
The counterweight is attached, followed by a ring gear from an automatic transmission, followed by 1/2” aluminum plate to which is mounted the machine part that mates to the redrive.
The starter pinion gear is about 3/4” short of reaching the ring gear,
Totally stumped…
Thank you,
David Walker
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