DF300 23 Sceptre

[77SceptreOB]

Originally Posted by Snookerd

It looks to be above the keel an inch already?!

Damn that motor is pretty! I guess you have to wear a starched white buttondown to work on it!!

Ill bet it does 52 MPH (light) when you get it dialed in...

[DonV]

Danny here's how I did mine. I took a 5' piece of aluminum square tubing and jacked it up against the keel of the boat, along that flat spot. Then I tilted the engine so the cavitation plate was parallel to the tubing. I then clamped a piece of 3/4" square wood to the bottom of the plate to get my measurement, In this case it was 3/8"....not good!

After I installed the jack plate I did the same measurement process. And then screwed the jack plate up to where the cavitation plate is 2" above the keel.

Please notice how ugly my engine's lower unit is compared to yours. That's 12 years of being run hard and too poor to buy another one.

[DonV]

If the mod was doing his job he would move this thread from the photo section to the performance section......soon.

[Snookerd]

Sandy- the picture above is exactly what you are looking for....

I spoke to Mike R. From Intl Marine tonight. Top notch outfit-he is willing to trade props and adjust height anytime.

Ken-He said the linkage would not be the problem.

Originally Posted by gofastsandman

Put the level on the bottom of the keel and extend back just far enough to see the AV plate with both parallel.

Hey Lamont come here you big dummie.
Esther, your so ugly I could stick your face in dough and make
Gorilla cookies.

[Snookerd]

Don-done thanks

[Snookerd]

Thanks for compliments...my goal is to use it and put wear and tear on it and not hold back and just have fun.

[Bushwacker]

Hey Danny,

Your pics of the AV plate under way look about like mine! Hard to see a white plate under all that white spray! Need to put some black electrical tape on top of it to see it until you get it high enough! I've also attached a pic of the height measurement setup.

Been thinking about comments from Ken and others, and I believe it's hard to conclude anything about prop selection and potential motor issues till you get that AV plate up out of solid water. The propeller hp vs. rpm curves I've seen in Dave Gerr's propeller book look fairly linear, so I would think that you should be able to spin the same prop as a 250 Zuke 10% faster if your motor is really putting out 20% more hp!

Sounds like Don has the motor height dialed in pretty well, although the setback of his jack plate should allow him to run a bit higher than if it was mounted on transom. With 30" of setback, I'm slightly over 4" and it's STILL not high enough! Denny

[kmoose]

Originally Posted by Snookerd

I spoke to Mike R. From Intl Marine tonight. Top notch outfit-he is willing to trade props and adjust height anytime.

That's a great deal and I would certainly take him up on that but I'm not sure you will get the height you need without a bracket. The benefit of being able to adjust up without a bunch of effort has been a big plus for me when propping. Some props I tried could handle being higher than others but in the end you need one that will let you spin up to at least 6000 rpm and that is on the low side. Balancing that with the proper motor height will be the magic ticket.

[Snookerd]

I spoke to Ken at Prop Gods. He recommended the 17p. My anti cav plate looks good in the photo I posted. I believe that I need to raise the motor 1 inch or at get a jack plate and be close 2 inches up and try to keep using the 18.5.

[gofastsandman]

Originally Posted by Snookerd

I spoke to Ken at Prop Gods. He recommended the 17p. My anti cav plate looks good in the photo I posted. I believe that I need to raise the motor 1 inch or at get a jack plate and be close 2 inches up and try to keep using the 18.5.

Height first plz.
I`m putting the ole sst 1 on for multiple grounding encounters.