Mercruiser 470 repower 1978

[THEFERMANATOR]

I have no affiliation or 1st hand experience with any of these remanufacturers, just some I found in a google search. Or you can normally pick up complete running engines for under $500 off of craigslist. I wouldn't go with a V8 myself, too much weight, a gear change will most likely be needed in your outdrive, completely new engine bed, new mounts, most people agree the added power is a waste as you will rarely ever be able to use it, and the cost. Mercury reccomended the 4.3l V6 to replace the 3.7l 4 cylinder.

http://www.michiganmotorz.com/37l470...ww0aAjgM8P8HAQ
http://m.ebay.com/itm/470-MERCRUISER...-/171828567100
https://www.perfprotech.com/first-ma...product/245003
http://bpi.ebasicpower.com/shop/inde...=406_1733_1734

[surchin]

Thanks ferm
I picked those sites up too, feels like the best way to go. I'll let you know how it works out
Thanks sir
Sb

[step up here]

Some time ago a fellow named Aussie supposedly had the hot lick on the 470 motor! Have not hear from him in years and don't know if he ever completed the project.Hope he didn't get licked!

[surchin]

Oh Ya I remember that guy. That was funny. He was all fired up everyday.

So got off phone with mechanic. 10k to put in a 3.0. So instead. We are going to try to bypass the coolant system making it open raw water system. Anyone tried that on this. It makes sense to me. I've been chasing the pressure coolant system. So to eliminate it seems like it will work. No evidence of water in culindRs at this point so head gasket may be ok. We ran a blue devil sealing kit through it

See how she goes

[surchin]

Getting back out there.

[surchin]

Santa Barbara harbor launch ramp. Always thankful to make it back to the dock with this old boat! My patient wife and loyal golden retriever

[surchin]

I have a stainless and aluminum sheet T Top. Works pretty good. Bracing could be better.

[scook]

Have you checked your bilge for coolant? I had an overheating problem with my 170 when my outdrive impeller was bad and the coolant pressure caused the back seal in my water pump to fail. The coolant leaked out a relief hole and into the bilge whenever the engine got up to temperature.

If I remember correctly, the front end of the cam shaft drives the water pump and it was scored a little so I got a sleeve for it, installed it, screwed up a seal putting the pump cover back on and with some advice from Spare Parts was able to get it done on the second try and no more leaking.

It's a bit of a job - you have to remove the harmonic balancer, which is part of the alternator. I found all of the magnets were loose, lots of rust on the iron balancer and some corrosion on the coils. I cleaned that up and got several more years out of the alternator.

[surchin]

Originally Posted by scook

Have you checked your bilge for coolant? I had an overheating problem with my 170 when my outdrive impeller was bad and the coolant pressure caused the back seal in my water pump to fail. The coolant leaked out a relief hole and into the bilge whenever the engine got up to temperature.

If I remember correctly, the front end of the cam shaft drives the water pump and it was scored a little so I got a sleeve for it, installed it, screwed up a seal putting the pump cover back on and with some advice from Spare Parts was able to get it done on the second try and no more leaking.

It's a bit of a job - you have to remove the harmonic balancer, which is part of the alternator. I found all of the magnets were loose, lots of rust on the iron balancer and some corrosion on the coils. I cleaned that up and got several more years out of the alternator.

Oh Ya I've had lots of coolant in the bildge! I have replaced that gasket you mention here and water pump and impeller is good too. I think I have the h b removed for a standard alternator set up. I'm actually not sure what I harmonic balancer does.