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    Just how long is that resistor wire?

    It's possible it's still the oem harness and the resistor wire is original. You can simply run a new wire bypassing the resistor wire. Just need to get access near the ten pin connector
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    2008 Mercruiser 5.0 tks won't go into drive or reverse

    Mercury has a manual for the controls but not sure where other than borrowing from a shop or buying on eBay to get one. They're not incredibly difficult to remove and disassemble, I think the most troubling is figuring out how to get the throttle only button out without marring it and sometimes...
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    Mercruiser Thunderbolt V Ignition No Longer Available

    Try $750-$900+. And mercury didn't make them. Denso did and whatever their reason is anyone's guess The upgrade is a gm based hei ignition with the module on the distributor plate. Solid system and from mercury the entire system is priced accordingly. Don't know of a direct replacement for the...
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    Mercruiser MPI - How Intelligent is the ECM?

    Won't set a fault if running cool/cold. Would be in warm up mode unless engine temp came up to 125 (+). Most likely would still run rich tho. Can't really see timing as an issue but again that is controlled mostly by the ecm. I watched timing on data items with diacom/cds with mpi engines...
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    No spark, is it coil or shift cutout switch

    You've done some decent troubleshooting thus far, sounds like the shift interrupt switch itself is good. Check out the stickies at the top of forum page. Good info about your setup and a great troubleshooting guide for your thunderbolt ignition system
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    Mercruiser 8.2. oil in exhaust

    The clamp isn't your issue. I quit putting clamps/wire ties on the gear oil hose years ago, never had an issue The dry rot is most likely your issue. The hose will crack from dry rot fairly easily. It can be replaced without removing anything including the drive but it takes a steady hand and a...
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    Question

    I just know it as insert tool and by sight. Unknown part number but it should be listed under special tools in both the bravo and alpha Gen 2 oem manuals. #14 & #28
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    Start

    Looks like thunderbolt. Have you checked for spark/fuel delivery? There's a comprehensive guide for troubleshooting a thunderbolt ignition in the stickies, top of forum page
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    2008 Mercruiser 5.0 tks won't go into drive or reverse

    Could be a few things. Issue with the remote, broken shift cable/linkage, failed engine coupler, failure of gearset in the drive........
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    Question

    That compression ring does not go into the exhaust bellows, it goes into the aft portion of the u joint bellows. There is a special tool for installing it, large plastic, shouldered insert tool with a prop shaft and decent hammer, power tune on the sleeve/bellows helps with install. I've heard...
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    Mercruiser 8.2. oil in exhaust

    Tilt the drive all the way up and turn the steering hard to port Lay under the bell housing and shine a light upwards. The external gear oil hose runs from the bell housing to the gimbal housing next to the shift cable bellows and u joint bellows (stbd side of bell housing). It's approx 1/2...
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    No spark, is it coil or shift cutout switch

    Lanyard/operator presence switch perhaps? Coils rarely fail completely, however it is possible. A continuity test between primaries and primary/secondary will tell you much of the health of your coil
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    Outdrive bellows replacement question

    They are continuity tabs for the clamps. The u joint bellows should be labeled "TOP" at the fwd side and the clip should be near said label. The tabs pierce the gimbal housing and bell housing so the clamps don't suffer from corrosion. This is of course considering the entire continuity strap...
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    How to do new distributor timing on Mercruiser 7.4 Gen V?

    Yes, 1-8-4-3-6-5-7-2 clockwise rotation. Cylinder numbers are cast into the intake manifold, odd is port side, even stbd. Possible the engine is also flooded. Hold throttle only wide open and crank engine til it fires, return throttle to idle when it fires to prevent excess rpm in neutral. Once...
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    How to do new distributor timing on Mercruiser 7.4 Gen V?

    Possible you don't have the firing order correct or the distributor/rotor was installed TDC exhaust, not compression. Engine should run, albeit rough at 0 btdc
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    How to do new distributor timing on Mercruiser 7.4 Gen V?

    As doctor says, verify where #1 is on the cap, set distributor housing/rotor to the #1 location. The picture you've posted shows the distributor housing clocked correctly with the sensor opening facing aft, unknown if rotor position is correct. I would highly recommend you replace the old...
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    help with iffy gas?

    Not bashing it myself, just can't get over the fact it exists and is most likely in every boat gasser fuel tank in US. Laws are creepy, like a solvent. It shows itself in fuel bowls as corn starch. Don't even bother asking me how I know
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    help with iffy gas?

    Gas thread..... Let's lay off the ethanol bashing. Farmer gotta eat too
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    1989 4.3 mechanical fuel pump replacement

    You bought new, keep up with your routine maintenance
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    1989 4.3 mechanical fuel pump replacement

    An in line water sep filter would be appropriate in this situation
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