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Author Topic:   Mounting Honda 90 on Newport
Marv posted 12-07-2002 11:06 AM ET (US)   Profile for Marv   Send Email to Marv  
This is a good job-and a lift helps along with a friend/wife will cost a dinner though.

Mounting was supposed to be a simple process of taking the 80 Evindude90 off and replacing with Honda----at least that is what the guy who sold me the Honda said. Well-- didn't happen. It seems that on Evinrude the top 2 bolts line up with Honda but not the bottom 2 AND that was the trouble. No way I was going to put more holes in the restoration!!! After measuring, I mounted the Honda on its second hole--then marked and drilled the Honda bracket to line with my original lower holes. Results---made engine 2 holes lighter and engine sits with cav plate 1/2 in above bottom.

I would like to try mtg plate--nobody here heard of any made for Honda--can do later if I find one light enough--may allow slight height adjust too. Anybody go through the same problem?

Bigshot posted 12-09-2002 09:35 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
All jack plates should line up with your Evinrude holes. Believe it or not I think OMC mounting holes are the industry norm now. I know Suzuki used their mounts so that it would not be an issue if you bought their motor(made my Dad buy one). Yamaha copied OMC and later Merc who had some whacky mounting setups, especially on their PT&T setups. I think you will be fine as-is but any $150 manual jackplate will work.
Marv posted 12-15-2002 09:07 PM ET (US)     Profile for Marv  Send Email to Marv     
To--Bigshot---------- re plate---------Great !!!!!!!!! I will go for it.

I have ta tell u re my tests. I bought a Mich 13 X 19. Figured it would be a good start --mounted engine so cav plate is about 1/4 to be exact-- above bottom of Newport.

Went out--2 people--370lbs--12 gal gas--battery rear of boat.

Light chop--got(2-GPS) 39mph at 5300 rpm--began setting engine higher on trim switch-finally got 44 mph @ 5600 but very hard to steer! Coulda pushed for more but too choppy.

I think that if the boat will ride on her rear--I should be ok--so need ideas re jack plate and also bow risin prop.

If I don't raise engine trim --speed is down but good steering.

Any experience?? Please help.


Bigshot posted 12-16-2002 10:49 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
If it is hard to steer then you are either trimmed too much or your steering tab(above prop)is misadjusted. What does that engine redline at? The jackplate will help some but is not the Holy Grail. Do you have enough steering cable to move the engine back 6" should but check.
Marv posted 12-16-2002 10:23 PM ET (US)     Profile for Marv  Send Email to Marv     
Ok--let me understand. I thought a kackplate would be a two piece slider--one mounted to the engine and other to the boat allowing up and down adjustment. Is this thing gonna be 6 inches thick??? Does it gotta be that far back?

Let me provide more details re the hard steering. I have the boat set up with the engine setting on the second hole up from the transom. I tried the bottom hole but the bow dug in too much.
As I get to 40mph--5200-5300, the boat steers nicely--hands off and appears to turn ok--pretty even.

In trying for more speed, I felt that if I hit the up trim--gets the prop outa water---and it does--I increase to 5600 and 44mph. The boat appears to ride more on the rear 1/3rd of the bottom. But now the steering is hard--I think it is caused by the engine/prop lifted upward. So if I had a jackplate--I could leave the engine hanging straight down and lift up so prop is on a higher level. Perhaps an inch up according to the cavetation plate in relation to the bottom.

Wat you thinkin???

By the way--the trim increase up is not quite the distance to the 3rd hole up. About 3/4 inch makes the boat go faster.

Also--am thinking after reading you about weight of moving the battery under the console. Appreciate your comments--and wonder where I could find/see a jackplate?

jimh posted 12-16-2002 11:40 PM ET (US)     Profile for jimh  Send Email to jimh     
Marv--the forum, a marvelous place, is only part of the resources of this website.

If you want more information about engine setback brackets and how to install them, see the Reference section.

If you want to see photographs of boats with engine setback brackets, see the Cetacea section.

There is a picture of Nick's setup at:

Marv posted 12-20-2002 11:22 AM ET (US)     Profile for Marv  Send Email to Marv     
Thanks for the direction-Jim. Your site reflects a real labor of love. Super!

RE: Pics, I see what you mean as the bracket is very sustantial. I just gotta see one up close--I think sticking out 6 inches is a bit much for 2 sliding plates--well at least that is the way I would think of the design.

I'd like to get to a "gathering" to see boats that are "restored" and further perfected--as I am looking at replacing the red rub rail on my Newport--that or figure a way to clean it.

As I experiment I'll post results. I have really got into working wih the Honda stuff electronics, controls and etc. If anybody is interested, I have found a good Honda dealer who will discount abit and ship next day.

Another question I have : I suspect that there is a wide variability in performance between the same engine. I remember from racing models that some engines were just better fit to start.

What is your experience on that topic?

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