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  1. T

    Crankcase mating surface tolerances

    "OK, another one in the endles "OK, another one in the endless series of 15hp rebuild questions... How close is the fit between the crankcase cover and cylinder block supposed to be? If I place the crank cover on the block, without any bolts, and shine a light at the seam, I can see a very...
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    15hp rebuild reuse or replace piston rods

    "Hi all, moving along with "Hi all, moving along with my "15hp Rebuild Challenge" - I've sourced some replacement pistons from my local salvage shop (back story here: http://www.marineengine.com/discus/messages/12479/293199.shtml). The "new" pistons come with their own connecting...
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    Needle bearings in manual starter

    "Well, here's some real es "Well, here's some real esoterica for those in the know. In the midst of cleaning up my project 15hp Mariner (1990 model), I noticed this: Mariner 15hp starter bearings""> That is to say, one of the needle bearings in the recoil starter sheave hub seems to be...
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    Tiller handle disassembly

    "Hi, can anyone tell me ho "Hi, can anyone tell me how to disassemble one of these tiller handles? The kill switch at the end is dead & the wiring looks pretty stiff, but I can't figure out how to get the thing apart to start replacing stuff. Is the big rubber handle supposed to slide...
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    Tach installation on 15hp

    "Hi all, bear with me if t "Hi all, bear with me if this is obvious or has been already discussed to death in the forum archives, but is it possible to hook up a normal marine tach to a '93 manual start 2-stroke Merc 15hp? I've been running a Tiny-Tach which works great for the RPM...
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    Drilling out broken bolts

    "Hi all, Among other proje "Hi all, Among other projects, I'm currently engaged in the task of drilling out a bunch of snapped-off cover bolts from an ill-kept 15hp powerhead. I presume that if they come out reasonably clean, I can just rethread for the next larger bolt size, and if...
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    Piston wear marks bad news or business as usual

    "1990 Mariner 15hp, unknown hi "1990 Mariner 15hp, unknown history, acquired as partly disassembled non-running engine. Q1: Found what appears to be minor scoring or wear marks on one of the pistons. The marking is not deep, and there are no tangible grooves as such - one can just feel a...
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    Flywheel magnet chipped

    "It's amazing what one can "It's amazing what one can come across in the midst of some forensic outboard dissection. For instance, this. What do people do to these engines? Mariner 15hp flywheel, chipped magnet""> The engine is a 1990 Mariner 15hp with an unknown history, though obviously...
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    15hp 2stroke water in lower unit

    "Hi Forum, recently picked "Hi Forum, recently picked up a pretty filthy and neglected 15hp Mariner (1990, s/n 09610774). I've been disassembling it to find out whether it could be refurbished or whether I should just use it for spare parts. Unfortunately, I found water in the gear...
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    4hp problems Losing revs amp overheating

    "Hi all, working on a 1980 "Hi all, working on a 1980 Evinrude 4hp (E4BRCSS) that has me a bit stumped at the moment. Not sure if these two problems are separate or interconnected: 1. I can usually get the motor to start and run at WOT but if I bring down the throttle, it loses...
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    90bs 15hp lower cowl removal

    "Hi forum, back online and "Hi forum, back online and (hopefully soon) back on the water after a winter's hibernation. Quick question regarding a 1993 15hp: Is there any way to take off the lower cowl on these things that doesn't involve removing the entire powerhead? While doing...
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    Boss gasket on 1972 4hp carb do I need it

    "Hi all, doing a carb rebuil "Hi all, doing a carb rebuild on a 1972 Johnson 4 hp. I've cleaned out the carb and am ready to put it back together, however I noticed that the carb didn't have a boss gasket on the high speed nozzle (part #21 in this...
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    Need help finding correct parts for 1980 4hp

    "Hi all, I recently picked "Hi all, I recently picked up a 4 hp Evinrude with the model code E4BRCSS. That translates as "Evinrude 4 hp Belgium Rope Start 1980, Model S", am I correct? However, the parts lookups I've tried only have E4RLCSS and E4WCSS for that year. Basically, I just...
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    Unregulated charging on 15hp how much is too much voltage

    "Hi all, I've recently "Hi all, I've recently installed the standard 5 amp alternator+rectifier charging system on my '93 15hp Merc. My questions are a) how much voltage should I be seeing at the battery when running WOT? At the moment, I'm reading about 15.5, almost 16 volts @...
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    Merc 15 charging amp wiring thanks for the help

    "Hi all, the original [url "Hi all, the original topic has already dropped into the archives, but I wanted to follow up on it with thanks to you guys for your advice. It's been a slow project due to a busy last few months, but the engine & boat are now wired and ready to go with the...
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    Can you ID this 4hp

    "Hi all, acquired this fin "Hi all, acquired this fine and funky specimen in an online auction for a very affordable price. I haven't picked up the engine yet and the seller doesn't have it on hand to check the serial number (he also knows nothing about the unit except that it has two...
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    Thinking of buying kicker outboard advice needed

    "Greetings ye sages and seafar "Greetings ye sages and seafarers of Mercdom, I'd like to solicit your views on the following Buy/No Buy decision. Background: I'm running a '93 15hp Merc on a 13.5' fiberglass boat (see my profile pic). I'm happy with its performance but am thinking...
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    What thread on Merc 15hp flywheel puller

    "Hi, in extension of our c "Hi, in extension of our conversation here http://www.marineengine.com/discus/messages/12479/192175.shtml - I'm in the process of hunting for a threaded puller tool to remove the flywheel on my 15hp (original Merc part #91-13661A1). Since I'm a bit wary of...
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    Info on Merc propeller markings

    "Hi, I would be interested "Hi, I would be interested to know about the numbers and codes stamped on Merc propellers. Besides apparently including manufacturer's part numbers, is there any other relevant info on the prop that can be garnered from these? For example, I have two spare...
  20. T

    Merc online parts sales into Europe

    "Hi, this question probabl "Hi, this question probably goes out primarily to the European participants in the forum... Can anyone suggest or recommend any EU-based online dealers for Mercury outboard parts? Requirements would include a good self-service part lookup system and reasonable...
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