Repower I/O Qs.

Check out this site for ball park ideas on repowering w/ new power. I think you might be able to find a better deal one way or another, but this should give you a few ideas. http://www.marinepowerservice.com/?g...FR8wUAodtDVnHw

[spareparts]

some of the older transom plates had a different spread between the rear motor mounts for the 4/6 and the v8s, you will have to replace the inner plate to accomadate the v6/8( can't remember when they changed it to all the same 1982?). the simplest thing is to go with the same engine(250 L6). Theyare good engines, just getting hard to find, if you want to do something different, a 292 truck motor will slide right in there, its the same dimesions except height, its about 3 " higher, Mercruiser used to offer them with a 4BBl( thats why your intake has a flange for a 4BBl, and an adapter to a 2 BBL), rated at 200 hp, they were marketed for comercial use infront of the TR drive. I've seen several people convert their 250's to 292's( just been a while, its coming back slowly), they make a little more torque and HP. Change out your carb to a Q-Jet, buy a new exhaust bellows to make up the height difference(assuming the engine box will clear) and your on the way, with something completely different

[Hammerhead]

ThanX for all the info and links. being as how the icw speed limit is 25 mph and sea isn't hardly ever smooth nuff to do 50 in a 20' boat I'm gonna pass on goin' with a 300hp anything....<would be fun tho'>...What I found is a rebuilt inline 6 from Doug Russel Marine. Then I can make use of the exsisting outdrive and other thingys. Anyone ever deal with'm? TIA.

I'm tempted to just start from scratch and repower with a whole package but, the cheap bastid side of me sez...NOooooooo!!!

[THEFERMANATOR]

Problem solved, get you one of these packages when they become available. Increased milage and plenty of power and TORQUE!!!!! And there pretty lightweight.
http://marine.cummins.com/public_cum...3&menuId=1

[pikfish]

The main thing I would be think about with a "rebuilt" I/B motor is the fact that a saltwater cooled motor block has a limited life spand. Even the best rebuild does not repair the damage to the cast iron if the block has been used for years in saltwater.

[spareparts]

jasper engines used to offer good rebuilt marine engines that came with a 1 year warranty for marine applications, haven't used one in a while, but had good luck with them in the past

[Hammerhead]

Wrench ( highly respected shop) found a rebuilt longblock for 1500.oo and will do all the labor for another grand. That's alot cheaper than I tho't it'd cost.
I should have it back in a week or so. ThanX guys.

[spareparts]

do yourself a favor and replace the riser and manifold while its off( unless you know for a fact its been replaced recently), check with Barr Marine, Osco, Aqua Power/Sierra for an aftermarket replacement. Its good insurance against future failure. Your probably a good canidate for an electronic ignition conversion, pertronix makes agood one for under $100, check the weights and springs in the distributor while you have it apart

[76GMC1500]

Originally Posted by THEFERMANATOR

Problem solved, get you one of these packages when they become available. Increased milage and plenty of power and TORQUE!!!!! And there pretty lightweight.
http://marine.cummins.com/public_cum...3&menuId=1

That motor has horrible torque. 220ftlbs at 2600 rpm? Your oringinal engine made 350 ftlbs peak and would probably have been close to 300 ftlbs by the Cummins 2600 rpm peak rating.

[Hammerhead]

Originally Posted by 76GMC1500

That motor has horrible torque. *220ftlbs at 2600 rpm? *Your oringinal engine made 350 ftlbs peak and would probably have been close to 300 ftlbs by the Cummins 2600 rpm peak rating.

Sure is purty tho'. Tell yas, I was real tempted to have'm install a 5.7 package dealio. I'm just too ...cheap. :-[