Rope starting a 4 stroke outboard - Moderated Discussion Areas rope starting a 4 stroke outboard Author Topic: rope starting a 4 stroke outboard Binkster posted 01:54 PM ET (US) Ia it possible to rope start a 4 stroke over about 15 hp? I have tried to rope start my 25hp 4 stroke Merc/Tohatsu, but I can't pull it over fast enough and for enough revolutions to start it. (It ever has a pull starter). I also have a 1961 75hp Evinrude V4 on my antique boat, that will start on a rope with a 1/2 revolution of the flywheel. Rich contender posted 05:10 PM ET (US) Bink that one of the problems with a 4 stroke, 1st you have to make sure one of your pistons is at the top ready to fire.
The pull cord has to be long enough to give the engine a couple of fires, and you need the strength to pull the engine fast enough, long enough, and hard enough for it to catch and fire. Can it be done yes, but its very difficult.
Jefecinco posted 06:52 PM ET (US) I have a 30 HP Mercury EFI four stroke outboard that has a pull start cord and handle ready to grasp and pull. The manual says it is capable of being started without a battery.
As I recall you first turn on the ignition switch and pull the start cord one full pull. This, I believe is to charge a capacitor to provide sufficient spark to start the engine on the second pull. I intend to try it first with the battery connected. If that is successful I'll disconnect the battery and try to start it with no power available.
When I get out on the 13 Sport it is so much fun just to run around and to fish that I keep forgetting to test the pull start feature. Butch Jkcam posted 06:59 PM ET (US) I have had a recent new Yamaha 20 hp 4stroke, manual start, as well as a new Honda 20 hp 4stroke manual start. The Yamaha has no manual choke and you must expand upon the directions of 'pump the bulb till firm' to include my version 'pump the bulb till firm, and then pump the sob 5 more times' it will then start. The Honda, on the other hand, starts like a dream, very easy pull, and starts on the 1st pull about 75% of the time and 100% if a second pull is needed.
Although 'older technology' the Honda is such a superior engine it is not even funny. The Honda has a built in decompression release which reduces the effort to start by hand 40%.
It really does, and it really works. Merc/Tohatsu nice engines, not a Honda BF20.
Mercury 60 Hp Bigfoot Manual
Not even close. If you want easy start, it doesn't come cheap. Kb5xg posted 06:52 AM ET (US) yes, but the battery has to have enough charge for it to fire the plugs and work something else, if the battery is completely dead you are out of luck. My alternator (generator) not sure which had bad diode and was not charging on my 40 hp merc.
I killed it while fishing in the local lake. It did not have enough juice to start but i did pull start it on the third pull. Macfam posted 08:51 AM ET (US) This past Thursday, we launched our 28 for the season.
After launching, I briefly tied up on the floating dock. A commercial quahogger started his work skiff next to me. This was a well-used Honda (50HP, I think). He removed the cowling, wrapped the starter rope around a ring above the flywheel, and yanked. After 3 attempts, she started. He repalced the cowling and off he went. The ring above the flywheel may have been an after market addition.
I was very similar to what was on lawn movers 50 years ago. Teak Oil posted 10:08 AM ET (US) Butch I would not try to start your engine without a battery connected, as you may inadvertently damage the charging system. Make sure your owners manual says that your engine can run with no battery at all. Bloller posted 10:17 AM ET (US) There is a long thread on this from a year or so ago.
I have used the emergency starter rope to start my 2004 60hp Mercury Fourstroke EFI. It was quite easy. The battery has to be connected and still hold some charge though.
I don't think there are any 4 stroke outboards over 30hp made today that can be pull started without a battery connected. Jefecinco posted 07:35 PM ET (US) Teakoil, Thank you for that good advice. I will absolutely read the manual before attempting to start the engine without a battery connected.
Or, maybe I just won't try it as I never intend to go out without a battery installed. Butch Powergroove803 posted 10:41 AM ET (US) Put it on a hill, get your buddies to push hard, dump the clutch. Or buy a back-up battery, whichever one works for you Binkster posted 02:43 PM ET (US) I'll be looking for a 2 stroke for my 15 footer. LOL rich blacksmithdog posted 07:45 AM ET (US) My 2011 25 hp Merc 4 stroke is electric start, but just for giggles I wanted to pull start it one day out on the water. Started right up, wasn't nearly as big a tug as my 6 cylinder Merc 115 2 smoke. =8-) A bit of magic is that you can get that same motor as manual start, so no battery, but it's still EFI. How do it know?
Weekendwarrior posted 12:37 PM ET (US) My 1999 Honda 50hp has the ring around the flywheel for a rope, and it came with the matching rope and handle. You do have to remove (3) 10mm bolts and the timing belt cover to get to the flywheel, it sounds like that guy just operates minus the t-belt cover. I have not tried pull starting mine yet. JMARTIN posted 01:05 PM ET (US) My 2010 Yamaha F70 has a rope. I have never tried it but the owners manual says you got to have a battery with enough poop to run the electric fuel pump in order to pull start the motor. John hauptjm posted 01:28 PM ET (US) A guy on Youtube pull starts a 90 etec faster than I can start my mower.
Of course, he makes a video that takes 13 minutes to tell you something he could say in 30 seconds. Go to 10:15 to actually see the start. Jharrell posted 01:14 PM ET (US) Here is a a guy rope starting a 2012 Suzuki DF90A 4-stroke, so it can be done. This is a nice surprise as I was looking at this engine for re-powering my Montauk and did not think it would be possible. Looks like it needs enough battery for the fuel pump, unlike an E-TEC which can be rope started without a battery.
I wonder if a running kicker with a 6 amp charging circuit would be enough to run the fuel pump without a start battery or at least dead start battery? Teak Oil posted 08:23 PM ET (US) The kicker should be able to run a fuel pump, but a battery would have to be attached. Almost every single outboard with a charging system has to have a battery attached, even it is dead, 2 stroke or 4 stroke. There has to be somewhere for the for the charging current to go, or else the stator can be burned out jharrell posted 11:19 PM ET (US) quote: There has to be somewhere for the for the charging current to go, or else the stator can be burned out I thought most modern engines had voltage regulators that turn excess power to heat and are usually water cooled because of it? I don't believe my old Mercury is regulated so it would need a battery to act as a regulator lest my stator become the regulator, but I think most larger engines made in the last 10-15 years are regulated. This is why sealed batteries are not recommended for older engines, because they get boiled off acting as the regulator and you can't replace the water.
Mercury 60 Hp Bigfoot Maintenance
Some larger outboard even seem to have larger automotive style alternators which don't use permanent magnets so they can be regulated by controlling the rotor current therefore not generating any excess current when not needed. The new Mercury 150 4-stroke refers to this as an 'on-demand' alternator.
Peter posted 07:04 AM ET (US) Sounds like a pretty complicated system just to be able to pull start the motor with a dead battery. Wouldn't it just be easier to carry around one of those jump start battery packs? Jharrell posted 09:57 AM ET (US) I did carry around one of those jump start packs before I added a second dual purpose house battery with emergency combine switch and ACR. They take up a lot of space on a Montauk and aren't typically made to withstand marine environments, plus it's easy to forget keeping them charged. Definitely easier to start an engine with the jump start pack, assuming of course the problem is a dead battery and not say a bad starter or solenoid, then the rope comes into play. Always nice to have the rope as a last resort. This is why a kicker with a charging circuit is so appealing, hand starts, bolted on transom not taking up deck space, can get you home on it's own and may even be able to help get your main engine started again.
Teak Oil posted 08:23 PM ET (US) I don't believe the smaller outboards 30hp or less being disucssed here are regulated, and even if they are, usually the owners manual specifically states that a battery must be connected when running. I know my 8hp Yamaha does Binkster posted 09:23 PM ET (US) So apparently it makes a difference if there is a battery with a too low a charge to spin the starter but enough of a charge to run the fuel pump, or a completly dead battery or no battery at all.
Rich jimh posted 09:46 PM ET (US) I think you ought to start a new discussion with the topic: Starting four-cycle outboard engines without a battery attached. I don't think there is anything particularly special about starting any modern outboard engine when there is a battery attached. Based on reports from people with wonderfully wide and long experience, it is really not a big deal to pull start an outboard engine, even a big displacement V6 outboard engine. There is a much greater chance that you'd have a dead battery and need to start an engine than there is a chance you'll have a fully charged battery and have a starter motor malfunction. Replacing the cranking motor power with armstrong power is just a matter of arm strength, not engine design. Binkster posted 12:10 PM ET (US) jimh, all you 2 strokers can gloat, becuase your outboard will start on 1/2 revolution of the flywheel.
Not so with 4 strokers. Does your car start like your 2 stroke? No way, it takes a few revolutions to start it. That's why 4 stroke outboards are tough or impossible to rope start. At least thats my observation.
I was hoping someone could prove me wrong. Rich gnr posted 12:40 PM ET (US) Never tried to pull start a 4 stroke outboard over 5hp but the 20-25 hp 4 stroke engine in my Honda ATV pulls pretty easily. Occasionally it will pull your shoulder out of the socket if you catch it right at TDC of the compression stroke. I've learned to pull gently until I determine what's what and then let her rip.
Mercury 60 Hp Bigfoot Manual Start Char-broil
I can pull it left handed while standing over the seat and reaching across my body. My dirtbike has an auto compression release and you would think the motor has serious compression problems the first time you kick it over. Manufacturers aren't putting compression releases on mid sized 4 stoke outboards with pull start capability?
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