Diesel Conversion 23cc

[Highway12]

I think Harper's boat is also a straight inboard like mine. There are no real issues installing the Yanmar. It has the same exact footprint as the 350 V8. Pretty easy exchange. It will even bolt right up to the the velvet drive transmission, and doesn't weigh much more than the old gasser.

Hard to beat 9 GPH at close to 30 kts. with the simplicity of the diesel straight inboard combo!

[Wags23]

Just fired up my diesel (v6 tdi 225 hp) in my yard. Its a i/o hooked up to a bravo 1x. I changed it from a 350 mercruiser alpha. Only ran it last year for 5 hrs, need to make sure I have enough height from the static waterline. If not I'm going to have to get a riser made. The engine came with the exhaust pipe and bravo coupler so the height was predetermined. Anyone know of anything that will work such as a flapper ?

[Harper]

Highway, you are correct. The potter 23 is a straight inboard with factory tunnel drive / shaft etc. can you tell me what transmission and drive ratio you are running? Many thanks!

[Highway12]

Yes, it's a velvet drive 5000 8 degree down angle 1 1/2 : 1 . I talked to Mack Boring in NJ and they sent me the torque converter and bell housing I needed. Watermen around here swear by them on their crab boats. My guess is it will need a 17 x 19 wheel.

It's taking forever to clean up the bilge. The glasswork in those old boats is a little rough to say the least, and I'm glad to get rid of all that waterlogged foam!

I'm cutting down the motor mount stringers and eliminating the boxed out section next to them, so I can add aluminum angle with backing plates bolted through the stringer for the motor mounts. The stringers were wet, but in good shape. No rotten wood.

Once I test fit the motor, I'll take it back apart and glass everything back up.

[ct9amr]

I have had both velvet drive and ZF trans.
Both great and hold up great.

If you are redoing the bilge try the bilge coat product. Worked great on my shamrock inboard.