1973 20' CC Transom woes - Page 2

FishStretcher · #1 10-03-2011, 08:42 PM

No WOT handling issues, it carves turns as hard as I am comfortable with. No cavitation, and 2 weeks ago ran at absolute WOT for ~11 miles at a time (20 minutes) with no high temp alarm. Twice.

I will look for a picture of the anti-cav plate positioning. I might have a picture in my phone.

How much does the 150 weigh compared to my F100 and kicker. Remember, I am lifting ~428 lbs on the stern when I include the kicker.

Quote:

Originally Posted by pianewman

I agree that Fr. Frank deserves a "tip of the hat". He's gently told me what to do, over and over...I've got my dad speaking into my other ear, though, and his mid-west stubborness is slowing me down..

FishStretcher...where is your anti-cav plate when at rest, motor all the way in? What's the width of your large Hydro-Shield? I was told they don't make it anymore, and Fr. Frank recommended the medium anyway, because he thinks the large flexes too much?

Any cavitation with directional changes at WOT? I would think ACplate OUT of the water 1 1/2" might create some cooling issues?

Rained out today...upper 40s f...I'm a wimp...fishing should be fun...

FishStretcher · #2 10-08-2011, 05:25 PM

OK, I finally got a picture of my setup on land

Anyways, maybe my anticav plate is lower than I thought? I may raise it one hole this weekend.

Quote:

Originally Posted by FishStretcher

No WOT handling issues, it carves turns as hard as I am comfortable with. No cavitation, and 2 weeks ago ran at absolute WOT for ~11 miles at a time (20 minutes) with no high temp alarm. Twice.

I will look for a picture of the anti-cav plate positioning. I might have a picture in my phone.

How much does the 150 weigh compared to my F100 and kicker. Remember, I am lifting ~428 lbs on the stern when I include the kicker.

Sceptre20 · #3 10-08-2011, 07:38 PM

I would definately raise it at least 1 hole,judging by the picture the anticavitation plate is lower that the keel,it should be even or slightly higher.

eggsuckindog · #4 10-03-2011, 01:18 PM

The 1 1/2" is correct especially with that prop, I would not put that whatever on in any case but especially before running the boat without it. Can't figure out why the holes had to filled and re-drilled ? should have just raised the motor put the bolts back in

pianewman · #5 10-03-2011, 01:22 PM

The transom drilled holes were too low, and the engine was already resting in its lowest holes.

pianewman · #6 10-03-2011, 09:15 PM

The OptiMax is around 460, I believe, so I've got you beat, weightwise. I might have a full baitwell, as well, but I've not done that yet.
I trust if the engine gets too hot at WOT, I'll be able to hear the warning buzzer...I'll certainly notice the throttle cutting back!
Looks like I'll finally get it back in the water this weekend. I can hardly wait...

pianewman · #7 10-08-2011, 07:26 PM

Finally water tested the change in motor height, now with anti-cavitation plate 1 1/2" above the keel level.
Immediate change in handling, much quicker onto plane. My wife, who isn't boat savvy at all, said, "What did you have changed? Is the boat lighter?". With a medium load (550lbs. of humans and dogs), WOT gave me 43mph, about 5400rpm...200 shy of maximum. Also, pulling 180lbs. of children in a 2-person float is much less effort.

Motor no longer feels like it's straining, steering is much lighter. At WOT, speed/rpm/handling is best with the motor (perhaps) trimmed out a good bit. Boat isn't perfectly flat, the bow is up a little bit.

Sadly, annoyingly, the "quick and dirty" repair on the scuppers was a partial success. I'm still getting water seeping in from somewhere. Spray rails look solid, so the only possible leaking is one of the scuppers. On the water for almost 3 hours, not enough water to even trip the float switch, but I sponged out almost a gallon.