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    1974 850 mercury tilt cylinder leaking,

    That's what I have done with the older Mercs, since the power tilt is problematic on them anyway, is install a CMC PT-130 on the boat and remove the old Mercury tilt. It moves the outboard back, allows you to easily set the height for best performance and fixes all the hydraulic problems with...
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    Parts For 1989 Cummins diesel V903 engines

    For the OP, if you have a certified Cummins tech working on your engines, they won't use INSITE on a non-electronic 903. But they can refer to the Control Parts List cross reference for ordering parts for the seven different marine 903 engine configurations. Those CPL's cross reference with the...
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    Parts For 1989 Cummins diesel V903 engines

    I re-CPL'd a QSK60 G-drive this afternoon for 2,700hp, it had to be recertified for Tier 2 emissions with the ECU and injector update. Cummins INSITE refers to the CPL as Control Parts List when you make a CPL change and get approval from Cummins. Critical Parts List is also used...
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    Parts For 1989 Cummins diesel V903 engines

    I'm afraid it is true that Cummins no longer supports the V903 and VT903. However, the aftermarket fully supports them. They are still quite common in some agricultural tractors and off-road equipment like gensets, pump sets, chippers and hammer mills. There is an outfit called Agkits where I...
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    Volvo Penta D8 550 stbd exhaust temperature @ 1020F, port at 770F

    For future reference, EGT is a matter of duty cycle. 1,000F is maximum continuous. 1,100 F is 5 minutes max. 1,200 F is 2 minutes max. 1,300F is 30 seconds max. The pyrometer probe is just ahead of the turbocharger turbine inlet. It will be 200-300 degrees cooler on the turbine outlet due to...
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    diesel fuel filters

    I should mention too that the vintage of the engine won't make any difference. Even a Cummins N14, which is a 90's vintage design born from the NTC-series 855 cubic inch engines, has a low pressure rail supplied by a gear pump. But it has mechanically (rocker arm) operated, but electronically...
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    diesel fuel filters

    Unfortunately, I'm not familiar with the OEM spec on those. I work on Cat, Cummins and Detroit engines. I would recommend checking with the engine manufacturer to see what they recommend for final filtration spec on their fuel systems.
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    diesel fuel filters

    This will depend on the engine. Typically old-school primary filters for mechanically injected engines are 30 μm, secondary is 10-20, depending on the engine manufacturer. With modern common rail engines with electronic unit injectors 4 μm is pretty common since the rail pressure can run up to...
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    692 DDEC 111 625 hp small pin cylinder kits verses big pin kits.

    It's not what you believe. Check the overhaul manual. The DDECIII uses the advance timing keys. But this doesn't affect it as much as you think. The advanced cam timing was done for emissions, no other reason. They even had advance timing kits for 8V-71's in buses.
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    692 DDEC 111 625 hp small pin cylinder kits verses big pin kits.

    That is IF the proper cylinder kits come out. MTU's Detroit Diesel Reliabilt division quit making them. You can get the small pin kits for the 6V92TA and TTA but the DDEC III's were pretty much a one-off. Again, if it were me I'd sell the good engine as a running takeout (somebody will buy it)...
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    692 DDEC 111 625 hp small pin cylinder kits verses big pin kits.

    I disagree that the small pin cylinder kits will work. The rods are shorter in the big pin DDEC engines and if you put the small pins on those rods there will be a gap on both sides of the pin and the pin will only touch the rod in one place, plus the compression will be low. The 6V92 DDEC3 is...
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    692 DDEC 111 turbo spirals down?

    The 6V92 doesn't have an injection pump. It has rocker-operated unit injectors. Is the DDEC EDM throwing any codes? How could the rebuilder screw up the cam keys? The offset key goes in the back on both cams, the straight one goes in the front. Without a certified DDA mechanic with the...
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    Finally Had To Retire It

    I think it's a hybrid that has had various parts replaced on it with newer parts. It has a new stator and newer flywheel on it with Thunderbolt CDI ignition. I thought those older Mercs had a distributor, but maybe the 650 never did, not sure. The lower unit, I'm pretty sure, came off an...
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    Finally Had To Retire It

    When I had the powerhead apart to put reed blocks in it I pulled the pistons and rings to look them over and check the ring end gap. The bore was 2.938 and the stroke was 2.296. 15.5 cubes per hole. The lower unit had paint stick markings on it, said it was 1.6 Merc 115hp. However, I just went...
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    Finally Had To Retire It

    It has a Solas prop on it, 13.5 x 13. Not sure of the number of the splines. I had the prop off to grease the output shaft splines when I pulled the lower unit to check the water pump, but didn't count them.
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    Finally Had To Retire It

    It has a gen II lower unit, 1.6 ratio with a spline shift shaft. That was replaced with a good used one before I got the outboard. The paint stick writing was still on it from where ever the previous owner got it from.
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    Finally Had To Retire It

    That's correct. Technically it's a 65 because it has the 62 cube powerhead. The 500 and 50 have a 44 cube powerhead. Due to differences in how they rated marine engines in years past I didn't expect it to make the 65hp it was originally called. I was pleasantly surprised to see 63 on the dyno...
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    Finally Had To Retire It

    Since it dyno'd 63 prop shaft hp on the old International Marine Dyno (give or take a bit due to dyno calibration and correction to standard conditions), it's a 60. It's 5.5 mph GPS faster than the old Force 50 was, and idles so smooth and quiet can barely tell it's running when trolling with...
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    Finally Had To Retire It

    Yep, the Twin Ports. We came in the Superior Entry that fateful day and it was rough. Shutting down because the water pump wasn't moving enough water wasn't an option if we we wanted to keep the boat on top of the water.
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    Finally Had To Retire It

    Actually, that's one of the reasons I think it ran as long as it did. It has no electronics on it to go obsolete. I didn't pull the head to see what kind of shape the top cylinder is in, but even if that hole is bad it could be punched and sleeved and made to run again. And find a decent used...
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