First Splash

[willy]

Took Old School out this afternoon for the first time, motor runs like a top, the wind was horrible and all the boats were coming in as I went out. Bad chop, big swells. Boat did good a lot drier than my old CC. Of course I did not bring the enclosure because I wanted to check RPM's after my tune up. In the wind and chop the motor got to 5300 RPM. There definetly is a problem though, if you try to trim the motor up at all in a good chop and get going about 2o mph the prop ventilates as it goes over the swells. Could not trim or do anything about it. It is a 115 Johnson and weighs very little and the Armstrong bracket is mounted at least 2 inches to high from what I can see. I have one more hole I can go down on the mount but don't believe it will be enough. I either need a much heavier motor or some other way of lowering the motor on the bracket anyone got any ideas ???

[macojoe]

When in a big chop I tilt all the way down to get that nose plowing thur the water!! Not up for the very reason you say.

Well you can try a bigger prop to see if that will give you some more push??

115 is under powered IMO, But ok if you are not pushing it.

Were is the cavatation plate lining up on the hull?? It needs to be even eith the very bottom of the boat were the drain plug goes.
If not then try going down the one hole, if thats not enough then you will need a Jack plate or something to get it down there.
Is the motor the right shaft leanth for the boat?? older was 20" and the newer in 25"
Someone will chine in and say what year they switched.

But hey you got out there and she moves and runs great, and thats Great news!! The rest will come!

[willy]

Thanks MJ, went out and measured, it appears I have a 25" shaft. I measured the keel line as best I can and it appears the ventilation plate is about 4" above that line. I went to the web and got mounting instructions for the Armstrong and they say you need to raise the motor approx 2.5" above that line for a 30" bracket. So I am at least 2" too high. I have one more hole on the motor I can go down, about 3/4 " maybe that will help. If not I might be able to drill new mounting holes from what I can see in the bracket and seal up the old ones. I have to do more checking because I have so much positive floatiation in that boat and I was flying solo today. Put a couple more guys and a cooler of ice and it may be a non issue

[macojoe]

well I did not follow the direction's when I added my bracket :o
What I did is mesured the 25" from the plate to the mounting bracket, then I mesured the bracket on the boat so that the motor when hanging would be right in line with the bottom of the boat.

I have had no problems, was it the right thing to do?? But I like it!!

175 yamaha weights in at 390# and the full swim platform bracket weights in at 125 total 515#

[Mac_Attack]

MJ your boat and mine ride lower in the water. *Willy how much do you weigh? *Glad you got out on the water. *You'll fine the answer. *Good Luck! *Bill Mc *;D

[willy]

Hey Mac, I weigh 230, and I think the motor weight is an issue, being a 4 cyl. If I had my old Merc 150 on it , it would sit 2 inches lower in the water. Put it this way, if I get water in the cockpit it does not run to the back unless I'm moving. The smaller motor and the floatation of the bracket are the reasons that the normal formula for installing the bracket are issues. Plus it was installed well but measured wrong, it is at least 4" above keel line if not a little more, that is too much. This winter I think I will drop it down to the last hole and gain about 3/4" more drop. I that does not work I will have to redrill the mounting holes

[willy]

As it stands now I cannot trim the motor up at all unless it is real smooth water, which I never seem to get

[willy]

But the good news is that the motor after tune up and w/o the enclosure does get close to max rpm which was a concern I had from the sea trial with Fillet. I was up to 5300 and I was in a horrible chop and wind so it should do max under normal conditions. And it puches that big boat pretty well, I was surprised how quick it jumped out ;D

[willy]

Anyone know does the armstrong bracket come pre drilled with the motor mount holes on tha back plate or do you do that when you install them

[willy]

Bump