mercruiser 470 replacement?

[THEFERMANATOR]

$5200+ labor will get close to $7K REAL quick if you aren't careful. And like posted above, it will be a BIG step down in power. Your 470 is probably a 170-185HP VS the 3.0L at 130 or 135HP. So the 3.0L will have at wide open what your current engine has at cruise. Personnaly I would have the hull and stringers checked THOROUGHLY before I would drop another dime in it. If the hull checks out, or only needs minor repairs, I would reccomend shopping around as brand new 3.0l's can be had for a good bot less than $5200 which I believe is full list price. But I would strongly suggest either rpeowering with a 4.3L for simliar performance, or getting a rebuilt 3.7L for it.

ebasicpower has a 3.7L long block for $2395.99
http://bpi.ebasicpower.com/pc/EFMME224LA/REMAN224

And michiganmotorz has a decent rep from what I have heard, and has one for $2899, or a brand new 3.0L complete bobtail for an ALPHA outdrive for $4769
http://www.michiganmotorz.com/37l470...689-p-628.html
http://www.michiganmotorz.com/mercru...age-p-303.html

[surchin]

yep, the ocean out here does not allow me to go full throttle however i do a lot of diving and with a couple guys there is a lot of weight, but I'm still 3/4 throttle ish.
and yes I'm looking at a realistic 8-10,000 for this i bet. 5200 for motor was just a quick look up at the boat shop to get an idea.

MY hull is probably not as strong as I think it is, there are no obvious soft spots and the environment here is not moist to creep into wood, and some serious checking is def a first, drilling holes sounds painful but its probably the best way to look at a core.

Thanks boys, I'm open to any more links on all the motor options here, i will check them out. I still may get lucky and it is a bad drive in which case a new SEI drive is my plan. although a new motor and drive is in my dreams.

[surchin]

what is advantage of a "bobtail" verses a complete motor? 4700 on sale complete is good. would i need to replace mount locations though? i have rebuilt the engine mount stringers a few years ago.

I do not think a new long block that is bare is a good option, all the working parts that attach from my old motor are pretty much 1978 orig or ebayed and the labor costs to remove and rebuild it would be more than a new motor. I do not have knowledge time or space to do it so I'm paying a shop the labor $100 hr. i can't see putting a 30 year old parts, starter, on a new motor as a good option.

[smokeonthewater]

RED FLAG!!!!
"Rebuilt engine mount stringers"
To do that is a full on tear down
Remove the cap, replace stringers (full length of boat) replace floor....
If you had stringer problems and did any less than that you can forget the motor and start boat shopping.

[surchin]

alright smoke yes def some orange flags flying out here, i just know what i have had to do to this old motor when i got this boat on the cheap and i would like to avoid going through that again trying to buy another old boat cheap.

where so you find an old boat in good condition anyway.

i don't know, i guess i will just use my kayak more.

[smokeonthewater]

Ur talkin about spending 10k.... That's not cheap...
10k plus whatever you can get out of your current boat should net you a decent water ready boat.

[twhrider2]

Surchin ...I also run a 78 470 that fortunately runs great. Recently picked up a 3.7LX 190hp fresh water low time engine for spare for 300 bucks...just sayin. If your are not in a hurry they are out there.