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#1
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op, take a pic of your engine and post it here. It's really obvious if it's a looper or a cross flow.
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#2
06-18-2014, 06:27 PM
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well I just checked it and its definitely a solid block between the heads so a Looper it is ! and I see that on top of the flywheel its marked at 18 degrees in red.
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1988 Grady White Seafarer Yamaha 250 ox66 on a bracket
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#3
06-23-2014, 07:54 PM
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just came back from taking out my Looper, she
ran really well. only thing was my tac red 4800 a WOT. Should I be thinking re prop?
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1988 Grady White Seafarer Yamaha 250 ox66 on a bracket
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#4
06-23-2014, 08:46 PM
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Get a known good tach and make sure yours is correct first. From your previous posts it sounds like your timing got set to 18 instead of 22 which would derate you to 120HP and cause your RPM's to be lower. I would stick with the 18 degrees of timing as it is ALOT safer on your engine, and reprop it to turn up to 5500-5600 or so at WOT.
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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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#5
06-24-2014, 05:27 AM
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Ferm, I will do just that. Thanks a lot.
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1988 Grady White Seafarer Yamaha 250 ox66 on a bracket
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#6
07-13-2014, 08:36 PM
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Ferm, I swapped out the tack and I;m still only turning 4800 rpm's. I currently have a 15x17 aluminum prop, I'm confused on weather to change the size /pitch and or both. any suggestions ? thanks,
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1988 Grady White Seafarer Yamaha 250 ox66 on a bracket
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#7
07-13-2014, 09:37 PM
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It sounds like you need to drop down to a 15 pitch prop for it. Also it may be worth checking to make sure it has the 2.25:1 lower unit gears. Alot of the V4 large gear cases fail, and get swapped out for V6 gear cases(same size), but the V6 case has 1.86:1 gears and the V4 version of it has 2.25:1 gears. Put the engine in gear, mark the prop and flywheel, and see how many rotations of the flywheel it takes for 1 revolution of the prop.
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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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