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    Ideal prop - 28' Landing Craft - Twin Seapro 300 AMS

    Hey all, Attempting to prop my Landing craft. Owners manual says 5200-5600rpm and ideally should be in the "upper range". Brand new motors - SeaPro 300 AMS First prop tried was Enertia Eco 16x19 - 5240rpm - 52.7mph Dealer recommended a Eco 17. Briefly was 5640rpm wasn't there for long as...
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    Will 41646A9 bell housing work with gimbal ring 8M0062440

    Hey, My Merc dealer doesn’t even know the answer to this! My ring was cracked so I bought a new one 8M0062440 but I need the bell housing, the parts fiche says I need 41646A7. It’s backordered until at least end of next week. And I’ve had issues this year getting parts that are listed as...
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    1988 Merc 5.7L 350mag - Powering steering shaking the boat on moderate turns @ dock.

    Hey. I bought this boat last year, the pump was low on fluid. I dono if there was a leak, but I did find the hose to the PS cooler loose (Port motor mount had oil on it, so I suspect it was leaking from this connection. So I tightened that up. It's no longer loosing fluid. The powering...
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    Polyester Resin - Leftover puck cured on outside but "rubbery" on the inside

    Polyester Resin - Leftover puck cured on outside but "rubbery" on the inside Hey. I did all my prep work because of a hole in my boat from a railway bunk collapsing. I've finished the entire layup of CSM & 1708...
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    1989 Raw Sea Water pump 7.4L Bravo 1 - Stripped thread on pump housing

    Hey. I have a Formula 7.4L Bravo 1, one of the engines sea water pump housing is melted (0C320740). The engine already had an aftermarket Sierra pump housing installed. So the multi-piece original housing is long gone. (Ran without water so it quickly melted) I just purchased the Merc Kit...
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    1988 Searay 24', hole in bottom of Boat (from bunks collapsing)

    Hi All, I had my Searay out last year to replace the coupler etc on my marine railway. One of bunks ripped off the supports putting a 2" angle iron through the hull. There were some words said!@#X. The photo was taken the day of, the damage has been drying on land all winter. I completely...
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    1988 Merc 5.7L Mag - Alpha One Lower/Upper Drive shaft seals

    Hey. I bought a new SEI Lower Unit for my Alpha One. All was great until I hit a rock at low speed. Well they've fixed it and it's on the way back to me (replaced some bearings, gears, prop shaft & the case). When I removed the lower I noticed some diluted oil on the vertical drive shaft...
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    Merc 5.7 350 mag '88 - Spark plug 5 & 6 carbon build up.. Others look good

    Hey. I pulled the plugs so I could rotate the flywheel easier to measure the run-out (.004"), before installing my new coupler. Anyway.. I noticed plugs 5 & 6 which are across from each other and 2nd from the rear, look different then the rest. There isn't a HUGE amount of carbon build up, but...
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    Merc 5.7 Mag 1988 LH rotation, manually turned RH by mistake... Did I break anything?

    Hey. I feel like a complete dumba**, but I had a brain fart. After removing the plugs to check the flywheel run-out today with my dial-indicator. I turned the motor 5 or 6 times CW (RH) instead of CCW (LH) very slowly. This is looking at the rear of the engine. FYI - A normal 5/8" plug socket...
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    How to support 1988 Merc 5.7L Mag on wood while replacing the coupler?

    Hey. I pulled the engine today and turned it around in the boat, I blocked it up on some 6x6's and 2x6's. I've searched high and low and all the photos I can find have the motor sitting on the flywheel cover "feet". Obviously the flywheel cover comes off, so how does one support the rear while...
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    Gimbal Bearing Install issues - 1988 Merc 350 mag alpha one

    Hi all, I bought my merc tools from whoya on eBay. Seem like quality pieces. A few weeks ago I spent quite a few hours aligning the engine on a boat I just bought. Had to lower the front of the engine about 1/4". Alignment bar went in smooth as butter. Until I rotated the engine! I could barely...
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    Brand new Needles/Floats and the new Plastic Float is getting stuck open!

    Hey. I took my carbs off they have never been removed, as fuel was coming out the overflow when primed. The inside of both carbs were clean as a whistle, no varnish at all (I've always use fuel stabilizer in the fall) and also buy gas with no ethanol. These are Tillotson carbs: 6517A14, BA4A...
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    1983 Mercury 50HP 4 cylinder 16V @ WOT WITH a regulator (rectifier was replaced)

    Hi, NOTE: My motor originally had a rectifier only, it now has a regulator (rectifier was removed). I installed it yesterday. Even with the regulator it's pushing 16.1V at WOT. It seems not everyone is reading my entire post which is understandable since I wrote wayyyyyyyyyyyyyy too much...
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