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re-powing
i'm going re-power my 1980 v20 . its an i/o with a mercruiser 470/165 hp alunm. block. i was thinking of getting brand new. the 3.0 with the alpha outdrive. but on another site called the bass barn. (im from the philly /atlantic city area). i was getting alot of feedback that that engine with the EFI, it was putting out 135 h.p. and the tourq wasn't good at all! then i have some people tell me its plenty?? does anyone have good info on this? also if i have to go to the 4.3 v-6 is the engine box big enough on our boat? with the re-powering, i'm also going with all new gauges . i was looking at complete controll panels with new ignition, the one i was looking at was made by mar-lan.and a new throttle mount,single lever side mount any ideas ? thanks for everything, this is a great site!..... francis wurtenberg
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#2
02-18-2011, 07:18 AM
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I personally don't think the 3.0 will be enough. I haven't priced one lately, but the 4.3 used to cost more than the 5.0 V8. Check with ebasicpower.com or marineenginedepot.com If you can find a good used transom assembly and drive, you could install a new drop in motor. Look for later model boats that have had a frozen motor or damaged hull. Most people on this site will tell you to glass up the transom, bolt on a bracket, and mount an outboard.
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#4
02-18-2011, 07:38 AM
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these are the prices..... 5.7L.Alpha I Gen II COMPLETE PACKAGE $11,942Installed !!! 3.OL.135hp Alpha I Gen II $7,200 Installed !!!COMPLETE PACKAGE* 350 Mag MPI300hp WOW!!!COMPLETE PACKAGE*$13,800 Installed !!! 4.3L 190hpAlpha I Gen IICOMPLETE PACKAGE$9,600 Installed !!!
Last edited by schwa; 02-18-2011 at 07:53 AM.
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#5
02-18-2011, 07:50 AM
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Quote:
A lot boils down to what YOU want out of your boat...are you pulling up skiers/wakeboarders?...do you need a strong hole-shot?...are you comfortable w/cruising in mid to high 20 mph range?...on the other hand, if you are pulling skiers and want a higher cruise-speed, go back to the 165 HP...having experienced the bigger motor, I think you are going to miss the 30 HP...I know I would...it would be a shame to lay down the $$ you're about to and be disappointed every time you throttle up... Keep us posted on which way you go...we know what it'll do w/the 470...but it might help others out in the future if the 3.0 is sufficient...and remember...pictures are ALWAYS good...  Now that you've posted the numbers, I'd jump on the 4.3!!...nice compromise on price/weight and plenty of HP!!...
__________________
'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha 
Last edited by reelapeelin; 02-18-2011 at 07:55 AM.
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#6
02-18-2011, 08:01 AM
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yeah, i take her up to about 25 miles out. sometimes on the summer weekends, the inlets get a little crowded!! and its better to have alittle extra then not enough!! its going to be $2400.00 more for the 4.3, but i think it might be worth it
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#7
02-18-2011, 07:08 PM
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you are buying back your ride. be sure before you commit to look at the hull and stringers. it can get expense when you dont do any of this work yourself.i know its a hard call when you already have owned a v 20 and witnessed the performance of a awesome rig. [for its size]. good luck in your choice.
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#8
02-18-2011, 08:09 PM
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did they have a price for a 5.0L MPI?
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#9
02-18-2011, 08:34 PM
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you should also check with Marine Power in Farmingdale NJ. They usually have good deals. Mercruiser also offers certified pre owned motors through dealers. I could check price and availability for you if you want. Do you just need an engine or do you want to replace the engine,transom, and drive?
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#10
02-18-2011, 09:54 PM
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Have you considered rebuilding your motor or getting a rebuilt longblock. Mercruiser and Jasper sells good rebuilt longblocks!
__________________
 77 V20 cuddy with 170 I/O Mercruiser 72 16ft. Carolina w/a 25hp Evinrude
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