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TOPIC: 175 Starts Hard

175 Starts Hard 17 Jun 2009 01:51 #1

  • rick35
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I have a 2008 175BR with the 3.0L 135hp Mercruiser. When starting cold the engine starts hard and when it does start it runs rough until it warms up. The engine has TKS which I'm not sure is such a great thing and its supposed to eliminate the need to pump the throttle before starting. Even when the boat was new it was hard to start. Anyone have any ideas on what the problem might be and how to fix it?

Rick

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175 Starts Hard 17 Jun 2009 03:49 #2

  • Chip73
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Hmmm. On mine, I push the throttle all the way up, pause for 2-3 seconds and then bring it back to about 1/8 throttle (push the center button to disengage the outdrive). I then start the engine no issue and adjust a little until it warms. If I do not do this it will not start.

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"Standing Room Only"
2008 175 W/ Family Fun Pack
3.0 Merc / Alpha 1 Type II
Uniden Solara DSC VHF
Garmin GPSMAP 176c
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175 Starts Hard 17 Jun 2009 04:57 #3

  • bkaltec
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Take off your flame arrestor and start it when its cold, it should choke itself until it warms up, according to the mercruiser tks feature.

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175 Starts Hard 17 Jun 2009 09:47 #4

  • garry454
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Just do as Chip said. The TKS is not quite what it is advertised to be, it's not fuel inj. Just marketing hype i guess.

Honestly, I can't see the difference in starting between my old Sea Ray w/ 302 Ford and a 650 Holley mid 70's era, and this new boat. Neither was "hard" to start, just each need a few pumps to get em rolling.

As long as the choke is indeed functioning (you can hear it whistle at idle when cold if you don't want to remove the FA), you just need to go thru the motions like the rest of us.

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175 Starts Hard 17 Jun 2009 15:41 #5

  • evaninvegas
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I agree tks does not work as described you still have to pump it once. More if its cold and leave the throttle in the 1st indent.

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175 Starts Hard 17 Jun 2009 17:17 #6

  • TennesseeBayliner
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I've always given my 3.0L one full pump and took it back to neutral before starting cold and it fires right up. Once it's warm, it starts without the pump.

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2008 Bayliner 175
3.0L Alpha Drive

175 Starts Hard 17 Jun 2009 19:27 #7

  • mattunique
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Well the "iron horse" is a good, reliable engine but a smooth runner and easy starter she is not.

My (non TKS) 3.0 required 3 full pumps to fire up from the day it left the showroom. Later in it's life I had to get the carbs cleaned twice a season to keep it running decent (after already draining the gas tank, replacing all filters, adding fuel water separator, etc., etc., etc.).

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175 Starts Hard 17 Jun 2009 21:26 #8

  • MorpheusGPR
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Those of you with this motor what are you gapping your factory AC Delco plugs to?

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2008 Bayliner 175

175 Starts Hard 17 Jun 2009 21:43 #9

  • garry454
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IIRC .044" or .045" I'll have to look. Should be on the top of the flame arrestor....

You have an 08, you aren't doing plugs yet are you? You shouldn't need to unless you have something else going on....

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175 Starts Hard 18 Jun 2009 01:59 #10

  • MorpheusGPR
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garry454;311219 wrote: IIRC .044" or .045" I'll have to look. Should be on the top of the flame arrestor....

You have an 08, you aren't doing plugs yet are you? You shouldn't need to unless you have something else going on....


I had some starting issues last time out when warm. I am changing them but keeping the old plugs as well. The gas in the tank was old I will be filling it up with fresh soon.


The box for the plugs says they are set to .035 so I need to go ahead and open them up then?

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2008 Bayliner 175

175 Starts Hard 18 Jun 2009 02:08 #11

  • rick35
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Ok so I'll forget about the TKS hype and use the pump it method. I had to do that with my other boats but I believed the sales pitch with my new boat. Thanks for the inputs.

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175 Starts Hard 18 Jun 2009 02:10 #12

  • Danny
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I start my V6 the same way. A couple of pumps of the throttle and back to idle and she fires every time.

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Danny.
Gold Coast, Australia.
2002 195 Sports V6
Alpha 1 Gen 2
High five 21" s/s prop

175 Starts Hard 18 Jun 2009 03:34 #13

  • wgander
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Does your engine have an electric choke?
Mine does, and it's failure gave me the same problems you're having.
It has index marks on top of the choke cover and the base, so you can try adjusting it a couple of marks left or right (I forget which direction to turn for rich or lean).
The spring control in mine was broken so it didn't work at all. It took me several adjustments to get the new one right. Now, it starts immediately and will run smoothly even if I put it in gear right away.

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1998 Capri 1950CL
3 Liter MerCruiser
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175 Starts Hard 21 Jun 2009 14:30 #14

  • rick35
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No electric choke on the 175. I tried pumping the throttle this weekend but its still starting harder than I'd like. I'll have to get the boat over to the dealer for a tune-up. My guess is that's its a simple adjustment. And if its not I have an extended warranty.

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175 Starts Hard 21 Jun 2009 21:24 #15

  • Matt's 175
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Just to confirm what the others have said, I have to pump mine a couple times too. Not really a big deal once you get used to it.

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2006 Bayliner 175
Tilt Steering, 2 pc. Cockpit/Bow Cover, Family Fun Pack, 3 Step Swim Ladder, Smart Tabs, 19P SS Prop, Uniden Solara VHF, Sony CD Player, 4 Sony Xplod Speakers, Garmin 172c GPS, 400w DC to AC Power Inverter, Dual Batteries, Guest Isolator, Dual Faria Voltage Gauges, Faria Hour...
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