Rank: New Poster
Groups: Member
Joined: 12/22/2007
Posts: 1
Points: 3
Location: Kentucky Lake, North end
|
Before I mount a pair of counter rotating 225hp mercs on my 65' steel hull boat, I am looking for your thoughts. I chose these two stroke engines for the power curve at mid range throttle, and some other technical reasons, but the overriding reason was, I had them, they were paid for, and they run great.
What do you think? will they do the job? If I am doing the arithmetic right, the hull speed for this boat is 10.8 knots. If I can get that speed at half to 70% throttle I will be happy. If not, I will stick with the outboard design, but will be looking for different plants.
These engines are equiped with four bladed props, and for now I have forgotten the size and pitch. Any ideas in this area? The hull has a 17' beam, and the props will be 12' apart. The keel is 12" X 35'. and really
holds the boat on a straight line so long as we have forward motion. Wind is not a problem when away from the docks. Because of the weight and size, I will stay away from docks when there is a blow.
Also, while I will read your questions as to why in the hell did I buy this old boat, I can only tell you that it has always been my fantasy to own "My Fathers Boat". This is the exact type and size houseboat (assumed to be a Pluckebaum), my dad always wanted, and he didn't want a wooden hull. I'm soon to be retired, not in a hurry, and will be very pleased if this works out.
The interior is another job. I will get back to asking about doing the interior over in a month or so. Currently I am thinking of something like the european cannal boats. Lots of dark wood, beams, and concealed storage.
The name of this vessel will be "My Fathers Boat". Formaly it was the "Iron Lady". Any thoughts about the superstision of renaming a boat?
My cruising field is the four rivers areas of Western Kentucky. The Ohio, Mississippi, Tennessee and the Cumberland. This includes Kentucky and Barkley Lakes.
so It will take me a few years of noodling around before I run out of new sights.
I also have a 28' Marinette express (1972) and use it for cruising when I am alone. This is a great boat and I hope to keep it, unless I need to cash it in to fund "My Fathers Boat". The crusing speed of the 28" is 17 mph at 2800 rpm. Fuel consumption at this speed is 1.8 mpg. How does this stack up with what others may get?
Thanks for any thoughts.
Larry Huckelberry
|
|
|
Please Register : New members may not post until approved. An email is sent after approval. We do this to reduce those who use these forums for spamming.
This forum is for Marinette Owners and other aluminum boat boaters who wish to share boating information. Aluminum Roamer owners are also welcome. (Do not post content you do not have the right to post and mass (robots) posters are unwelcome. We also have a marine electronics page and lots of Chrysler Engine info. State by what permission, you copy content and accredit properly.) The site is now fixed with some more Chrysler information. I will try to post more information soon. We have space for pictures on the new location. Use shinkpic to autochange size http://www.onthegosoft.com/sp_download.htm
Great Sites - http://www.marinette.com Marinette Company
http://www.geocities.com/dougmrose/ Wiring Marinette
http://fastjeff.tripod.com/ Repair Tricks and Techniques for Marinettes
http://www.greatlakesmarinetteclub.com/
PLEASE post in the appropriate folder. Please, do not post your actual email address in publicly readable websites.
The first rule is be a class act.
|
Rank: Top Rank Aluminum Star
Groups: Administration
, Member
Joined: 12/5/2007
Posts: 981
Points: 1,793
Location: New Tripoli, PA
|
You should make about 6 mph easy, but speeds higher than that will require a ton more throttle (and gas). That's the thing about displacement hulls, like trawlers: They sip gas (or diesel) at 4-6 mph, but drink it thirstily above that speed.
Good luck on an interesting project!
Jeff
PS: I Agree that the 2 strokes have much better mid-range torque.
I'm STILL waiting for my bailout!
|
Rank: Dedicated Tin Star
Groups: Member
Joined: 9/11/2008
Posts: 99
Points: 109
Location: mebane,nc
|
larry ,
the guy at the end of my dock has a boat about 60' x 18' pontoon style i think he only has to 90's and he can be seen all over the lake so 225 should be fine .also on the next dock a man has covered his steel hull with stainless steel .it is in diffrent size sheets like it may have been scrap.
about your marinette 1.8 sounds like realy good gas milage for a twin not so good for a single.whats yours?going by charts.i have no idea what i'm getting.
tim
72 32' express
"http://www.theboaters.com/boats/Powerboat_Express_Cruiser_marinette_1972_anticipation"
|
Rank: Top Rank Aluminum Star
Groups: Member
Joined: 12/28/2007
Posts: 358
Points: -1,015
Location: JACKSONVILLE,FL.
|
Just saw your post and I have had several steel hulled houseboats with outboards up in Tenn. back in the 70's. You should fine, I think and I agree with Jeff around 6 Knots, Dont push full throttle as you will burn them up from the tremedous load you are pushing. You will also notice it will take you a good distance to slow her down with outboards. I used to kid it was like trowing out an egg beater, as I threw her into reverse. On another, do you have thru prop exhaust on your motors, if so listen up!! The more reverse you give them the more exhaust you put in the water, whitch is air bubbles. Props are to cut thru water and not air or exhaust. It cuts down on your reverse. Solution is to divert more exhaust out back of engine ABOVE water. I found I did have a reverse!!! Dont know if you have posted pics of the boat but will look. Good luck Sorrydog
|
