Crescent CS500 - Question

[John Schubert T*A*R*T]

I have several Crescent Class C motors, but no spec information. Can you assist me with this?
Thanks
Jay Young

I will look in my inspection manuals in a few days. Would you sell one of your Crescents to me. I drove a Crescent in APBA class C Outboard Hydro for Dick O’Dea. Won a lot of races.

[Albert]

Here is an answer from Dick O'Dea
Thanks for your note, I am sorry for the delay. We have been in IL, as Barb's Dad
passed away and she had quite a few details to handle. We had planned a trip to
Las Vegas over 6 months ago. When we returned from IL we were off to L.V. 2 days
later, and I just got behind in correspondence. I do not know how you reply to boat
racing forum questions, but here are the answers. I cannot see a difference in the crank parts, the large plugs were heavy metal slugs.All the cranks and parts were made in Germany, I believe by( Koben Schmidt) spelling may be off. The small
holes in the pistons skirts are about 1mm in dia. and drilled to lubricate the chrome
cylinders and prevent scuffing. The later replacement pistons were made by Mahle,
and we machined in the transfer port cut outs in the skirt, and the boost port window and oil holes. Some early replacement pistons may have been machined in Sweden

Will do my best to make the reunion.

I know I’m answering an old question here but your spelling on the German crank manufacturer should be kolbenschmidt they still produce a lot of pistons for some oe German auto manufacturers.

[Whiskers]

Just seen this post, Chris Applebee had / has an engineering shop in Rayleigh, he did a lot of work on the c/ shafts, info maybe of use.
I worked for Crescent Marine years ago until Crescent was taken over by Volvo Penta.