1987 22-2 Ospery re-power

[RickK]

Here's my comparison so far:

Twin Yamaha 70's- Weight= 514#; Price= $20,616 (Includes prop and rigging)

Twin Etech 90's- Weight= 640#; Price= $23,023 (Includes Prop and rigging)

I got feedback on THT that the widely accepted figure is a minimum of 70% of your rated HP.  The twin 70's come in at 61%, the Etechs at 78%.  But then, you have the weight difference of 126#.

That's some good stuff.  

[Tx49]

Here's my comparison so far:

Twin Yamaha 70's- Weight= 514#; Price= $20,616 (Includes prop and rigging)

Twin Etech 90's- Weight= 640#; Price= $23,023 (Includes Prop and rigging)

I got feedback on THT that the widely accepted figure is a minimum of 70% of your rated HP.  The twin 70's come in at 61%, the Etechs at 78%.  But then, you have the weight difference of 126#.

Just a thought. I don't think you should put as much weight in your decision on the weight. (pun intended.)

The use of the twin 90's provides 28% more horsepower.
While the motor package itself weighs 24% more, when you base your calc's on the overall boat weight, which is what you are really pushing, you are only adding 3.6% more weight (based on a 3500 pound boat.)

[Bushleaguer]

Good point.  

I'll try my  best to explain why I'm hung up on weight.

If you look at the picture above, you can see that with the current motor (1997 115HP 2-cycle, 315#)the waterline is just below the scuppers. (You can see the scum line- I hadn't power washed yet when I took the pic.)  When I am at the dock, if I stand in one aft corner or the other, I get water coming in backwards thru the scuppers. (I have the original black rubber flap type).  

That said, right now, I have a very dry boat when fishing.  I'm afraid that installing over twice the weight on that transom will give the boat "wet feet syndrome".  The last thing I want is for there to be constant water sitting in the back of the boat while it's at rest.  As I stated when I started off, I want to avoid re-working the transom and use it like it is.  

My next experiment will be to figure out the exact weight difference between the two options and put that much more weight on the back of the boat while it's at rest and see where it sits.

One thing I've wondered, and maybe somebody here can clue me in.  This boat was built when the only thing available was 2-cycle outboards.  The rating is 230HP.  That means that the boat was built to have either two of my current engines on the back (twin 115's) which would weigh in at a total of 630#, or a single 225 HP which weighed in at  455#.  There is a 1" or so "well" in the rear of the boat that drains out thru the scuppers.  The boat wasn't designed for water to be sitting there all the time was it?  I can't imagine that to be the case.  I realize that my boat may have taken on some weight over the years, but I really believe that it's minimal at this point.

So bottom line is, If I had to sacrifice 40HP in order for the boat to be dry, I'd do it.

[Capt. Bob]

You apparently have your mind set on twins so.....

As you stated, in 1988, your hull was rated for 230hp. An 88 225hp weights in around 455 lbs+/-.  If by FM you could split that motor in half and make it a twin (112.5hp ea.) weight would be distributed across the transom at 225 +lbs on each side. Let's use the 70hp model outboards and you now see that the weight distribution is just slightly higher (about four bags of ice and the cooler) and at the same time distributed more evenly across the transom.

The "tray" is designed to grab minimal amounts of water from the deck to help keep your feet dry (don't stand in the tray) and let it bleed out while underway. My WAC holds a slight amount at any given time especially when using the wash down on the deck while say anchored or drifting. I think that's normal.

Aside from the additional costs associated with the twin setup, I see no reason you wouldn't feel comfortable going with the 70s. Besides, replacing the older scuppers with new would help with the wet foot syndrome. To check, I'd get a few fishing buds and stand them across the back to see the relation of the waterline to the scupper as you said. I really think you'll be surprised, assuming the hull hasn't absorbed a ton of water over the years.

Don't know till you try and you may find out you can go with the 90s.

Good luck.

[gran398]

Taking a close look at your scum line...she looks about right.

Bob makes a good point about spreading the weight across the transom. As we know, these hulls were originally designed to run twins.

Everyone here has been happy with the ball scuppers.

If the hull is dry as you're thinking...those 70's will be all you'll need. They will far surpass the performance and speed of what you're used to now.

If there is any concern that the stringers are wet...take it to a truck stop and weigh it. Might not be a bad idea anyway.

Only reason to go with 90's would be hauling four big boys and gear for a day offshore IMHO. And frankly...these aren't the hulls for that application.

Double-checked mine yesterday. She ran 28 mph at 4000 rpm, a real easy cruise. Hit 39.1 mph on the GPS briefly at WOT, with the wind.

Hope this helps

[Bushleaguer]

I officially put down the deposit and have ordered the two Yamaha 70's.  Total price tag is S21,817.78 including tax.  

A pretty large chunk of it (~$2,200) goes to the conversion from single power to twins.  Steering cylinder and linkage, dash re-configure, transom drilling and fiberglass work.

I'll follow up with pics and performance report asap.

Thanks to all for all the advice.  Love this board!!

[dburr]

It is official.... I am now jealous!!!!!  

[gran398]

I'm excited for you!

You made the right choice IMHO....can't wait to see them on  

[slvrlng]

Hey Bushleager, do you think you can post a pic of your capacity plate in the capacity plate thread on the resource forum. We have one pic of one like yours , but it would be nice to see another version. I was looking at your pics in the photo galley and yours looks to be in really great shape! Thanks!!!

[Bushleaguer]

I wish I would have seen your message earlier- I was up at the boat on Friday and took a bunch of pics for an update.  I will get a shot of that cap'y plate on my next trip up.  It is like new and would be a great resource.  Working on an update and pics this morning.

[gran398]

When are the twins coming to visit?

[Bushleaguer]

The motors are shipping from Seattle today and will be on site at the shop by weeks end.  I stopped Friday and got an update from the manager of re-powers and a couple of the technicians that are on the project.  Not sure if I'm breaking any rules (if so, someone let me know), but I have to put in a pitch for the outfit that is doing the work for me- Dubbert's outdrive in Port Clinton, Ohio.  So far, they have been outstanding to deal with.  Very knowledgeable and professional.  In this geographical area, many boat repair shops have a propensity for having an "we'll get to it when we get to it" attitude.  That is definitely not the case here.  The folks at Dubbert's have that type of urgency and customer care (at least so far) that make you feel like you are in a Cadillac dealership.

Anyway, they have the old motor off and on a stand, with all the gauges, controls and accessories neatly banded on a pallet.  The best news is that the transom is completely dry and solid.  The glass man they have on staff said that it is rare for him to see a boat this age with a transom in such good shape.  He has the old mounting holes patched up and will begin the gelcoat repairs today.  The console has been stripped of all old gauges and controls.  They are working on the template for the new setup this week.  I was able to discuss with them what setup we'll use for fuel (dual raycor filters- one for each engine) and how to wire up the batteries.  Apparently, Yamaha prefers to have the engines wired directly to the battery and not thru a switch, so we are working on how we will set that up to always provide backup electric power for each engine.  They are not sure what I will have to do for steering.  They intend to try to use what I had on the single screw setup and hopefully just have to link the twins together.  They will know that for sure when they actually hang the motors and begin final install.

So this week, they will spend on running the new cables and wires and getting the console finished.  The controls, gauges, etc. were all in stock, so that will not hold up the process.  The goal is to have everything prepped and ready when the motors show up.  Then, it will be a one or two day process from there to hang them and hook everything up.

I'll post pics below.

[Bushleaguer]

Here's a pic of the transom before I started the process.  I removed the splash guards I installed years back (they work great BTW).  I will have to see how I can duplicate this in a configuration when the new motors are installed.



Here we are after removal of the guards.



And here's a shot of the console with the old gauges and controls

[Bushleaguer]

Now, here's some shots of where we were in the process as of Friday afternoon.  Transom view from outside the boat that shows the patch job on the old mounting holes.



View from inside the boat-



Here's what the  console looks like now



And finally, the old (maybe I should call it previous) engine.  Can't complain about it- I definitely got my money out of that old girl....

[Bushleaguer]

Slvrlng-
Here's a pic of the capacity plate.  Took with phone camera, so not the best, but you can see the info.  Also, the copyright tag on the liner, port side in rear.