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#1
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1983 V20 Cuddy, 3.7L/165hp Mercruiser Fishing out of Portsmouth NH |
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#2
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Not gonna happen. That engine should burn about 12 gallons per hour at a 3800 RPM cruise I would guess which on a V should have you running about 30-35 roughly. So 2.5-3 MPG is about the best you will probably ever see from it, but 2-2.5 MPG is much more realistic for a 2 stroke carbed outboard. It's hard to beat an I/O for fuel milage unless you've got a 4 stroke outboard. On the bright side though them old YAMAHA's tend to run forever with virtually no maintence except for the shift rods(which is easily fixable).
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR 2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD ![]() AND THE PINK JEEP!!!! R.I.P. http://www.wellcraftv20.com/communit...ad.php?t=11664 |
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#3
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Sounds like ya did good, Y'daddy!!...if it were mine and if this is doable on that particular motor, I'd yank the automatic oiling stem outta that thing quick...mixing is easy w/one of those graduated bottles...and it's a WHOLE LOT easier than fixin' that puppy after the auto-oiler fails and cooks your Yammie...
Hopefully some of the guys who KNOW will hop on here and tell ya if it can be done on that motor...
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'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha |
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#4
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1983 V20 Cuddy, 3.7L/165hp Mercruiser Fishing out of Portsmouth NH |
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#5
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my 225 gets 12-14 gph @4000 rpms which is pushing the boat at 30 knots. Don't get rid of the oil injection. The pump is gear driven off the crank and will never fail. You will waste a lot of oil going to premix.
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1981 V20 cuddy 2007 225 optimax http://budgetboattowing.com/ http://www.gardenstateyachtsales.com/ |
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#6
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YAMAHA's oil injection is one of the best second only to SUZUKI's(the only reason SUZUKI's is better is because there reservoir is under the cowling instead of remote mounted). They have a bronze gear on the crank and a steel drive gear for the pump shaft, so VERY few failures there. There only weak point is the remote oil tank set-up which is dependant on a switch and oil pump to get oil up to the engine. The pump is VERY reliable as it is rubber encased, but the switches do fail every so often. As for swapping out your I/O, I wouldn't. The 3.7L is a good engine for the most part, and will be HARD to beat for economy and reliability.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR 2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD ![]() AND THE PINK JEEP!!!! R.I.P. http://www.wellcraftv20.com/communit...ad.php?t=11664 |
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#7
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I fired the motor up in the driveway today and it seems to run fine. I did notice an odd 'ting' sound every time I shifted from either forward or reverse into neutral. I had the cover off and eventually noticed what was happening was whenever I went into neutral the starter was engaging and bouncing off the flywheel. Ever run into this problem?
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1983 V20 Cuddy, 3.7L/165hp Mercruiser Fishing out of Portsmouth NH |
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#8
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Hey Pete!!...I can't help it...I still leary of auto-oilers...so many other items to fail...switches, lines, intakes...my BIL's auto-oiler failed cuz the intake in the tank clogged and fried his motor...
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'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha |
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#9
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OMC's VRO yes I would get rid of. Merc 2.5 efi plastic crank gear and NO motion sensor yes get rid of. The only problem with tha Yamaha system especially from '90 on up is that the control module for the oil injection is built it to the ecu and not a seperate unit. So if it fails(very rare but I have seen it happen) you need to drop $1000 for a new ecu. There is a small inline filter on the remote oil tank back by the electric pump. If that is replaced every other year or so the system should be trouble free.
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1981 V20 cuddy 2007 225 optimax http://budgetboattowing.com/ http://www.gardenstateyachtsales.com/ Last edited by captpete13; 04-10-2011 at 07:24 AM. |
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#10
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The motor is on a 21' center console I just picked up. I'll run it on that boat and see what kind of mileage it gets. It will have to be an impressive ride in order to get me to swap my 3.7 I/O to an outboard though.
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1983 V20 Cuddy, 3.7L/165hp Mercruiser Fishing out of Portsmouth NH |
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