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Help starting older outboard
Posted by double d on 6/16/15 at 9:03 am00
My teenage son bought a bass boat a few weeks ago that has a 1996 Merc 150 on it. We went out and ran it and it runs great once started, problem was from cold start it was tough to get cranked up. I'm having him get it serviced by a reputable repair shop but was wondering what tricks do any of you with older motors use to crank them up? I told him to keep saving so he can put a Yamaha 150 4 stroke on it and be done with it.
This is how I start my dads Old 70hp Evinvude:
Prime the fuel bulb.
Move the warm up lever about halfway up.
Then start by pushing the key in to choke.
When the engine fire ups stop pushing the choke.
When the engine starts to revs up pull back the warm up lever.
Prime the fuel bulb.
Move the warm up lever about halfway up.
Then start by pushing the key in to choke.
When the engine fire ups stop pushing the choke.
When the engine starts to revs up pull back the warm up lever.
Thanks, that's how my dad's old Mercury in the 70's needed to be started. This control doesn't have the warmup lever like his did. Just happens the mechanic who will be tuning it up used to own the boat my son bought originally. Son got it from a friend's grandpa.
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re: Help starting older outboardPosted by OleBallCoach on 6/16/15 at 10:06 am to Tbooux
check the compression on all cylinders first what are they in order? Some motor are killer to crank with low compression. Next what is your fuels psi leaving the fuel pump needs to be about 6psi while cranking at a minimum. from there check from tank to carbs for any crack or leak...the smallest amount of air can cause huge problems. if carbbed check bowls and jets for debris. if EFI check for air in system and debris in cleanouts and filter seperator...lots to check for sure
re: Help starting older outboardPosted by Priapus on 6/16/15 at 12:14 pm to OleBallCoach
Those older Mercs like to be trimmed up a good bit when cranking as well...
re: Help starting older outboardPosted by Chris4x4gill2 on 6/16/15 at 12:49 pm to Priapus
We had that same motor on my Dad's boat. It was always cold natured and took a while to warm up. Always had ot keep the choke on for a few minutes to get it running good and warm so it wouldnt die.
LAst issue we had with it was due to one of the coil packs going out. Definately made it harder to start when all of the cylinders werent firing.
LAst issue we had with it was due to one of the coil packs going out. Definately made it harder to start when all of the cylinders werent firing.
I used to always start mine on ear muffs in the driveway the night before taking it out, always seems to fire up better the next morning at the boat launch....and then you're not "that guy" at the marina cranking and smoking out the boat launch
Now I have an F250 and it starts every time on first crank.
Now I have an F250 and it starts every time on first crank.
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