Big Motor questions
Big Motor questions
Went out fishing last Saturday for the first time since March. I know, that 's bad! Anyway, while running around through out the day I noticed my big motor was "pulsing" in terms of power as I was going from spot to spot. By pulsing, I mean you could feel the boat speed up then slow down slighty. RPM's stayed the same. Have never noticed this before. Nothing real dramatic but I noticed it. Was using a fresh tank of gas. It's a Yamaha 150. Any thoughts on what it could be? Motor started and seemed to be running fine other wise.
Re: Big Motor questions
My first thought was it was areas that had a lot of current changes, like eddies. I don't know, may have just been me, but I've never expereinced that in this boat.
Re: Big Motor questions
First of all I would talk to a mechanic, Lou and Robert at A Boat Shop is who I use. Pull the prop to see if there is any tangles in the prop.
The other thing I would ask is have you had the fuel lines changed? Is your Bulb hard or going soft when this happens? It could be fuel, it could be that there is a blockage in the fuel line - if your not running stabil and leaving this ethanol bio fuel in the boat for that long it starts to seperate and do nasty things to the fuel lines. I know Robert has been replacing late model boat fuel lines when they arrive at the shop. - I wouldnt press this engine any further until you have identified what is causing the pulse.
The other thing I would ask is have you had the fuel lines changed? Is your Bulb hard or going soft when this happens? It could be fuel, it could be that there is a blockage in the fuel line - if your not running stabil and leaving this ethanol bio fuel in the boat for that long it starts to seperate and do nasty things to the fuel lines. I know Robert has been replacing late model boat fuel lines when they arrive at the shop. - I wouldnt press this engine any further until you have identified what is causing the pulse.
- JaJa Jigs - Get THUNKED
Links to Check Out -
https://www.instagram.com/jm_ash/
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Links to Check Out -
https://www.instagram.com/jm_ash/
https://www.bestbasstournaments.com/
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Re: Big Motor questions
Had the same prob with a 150 yam. check the plugs and make sure they are good. then another time it carbs needed cleaning
- aNNieNsaLTIE
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Re: Big Motor questions
I second with ash..... If you haven't changed your fuel lines, run some type of treatment, done a tune up in a while your going to have performance issues.ash wrote:First of all I would talk to a mechanic, Lou and Robert at A Boat Shop is who I use. Pull the prop to see if there is any tangles in the prop.
The other thing I would ask is have you had the fuel lines changed? Is your Bulb hard or going soft when this happens? It could be fuel, it could be that there is a blockage in the fuel line - if your not running stabil and leaving this ethanol bio fuel in the boat for that long it starts to seperate and do nasty things to the fuel lines. I know Robert has been replacing late model boat fuel lines when they arrive at the shop. - I wouldnt press this engine any further until you have identified what is causing the pulse.
My friend had the same problem with my old boat. He never changed the main fuel lines or filter, no annual tune up, just ran it until he experienced a problem... I know money dosent grow on trees, but if you squeeze every trip out of your boat and avoid or postpone scheduled maintainence you may be stuck one day a long way from the ramp.
Re: Big Motor questions
Kentuck wrote: I mean you could feel the boat speed up then slow down slighty. RPM's stayed the same. Have never noticed this before. Nothing real dramatic but I noticed it.
Monts - I am thinking Hub Slippage from your prop being out of the water for so long. ( not funny - I have another 72 hours of overtime on this next paycheck and I am plumb wore out. )
... When you say the RPM's dont change - Is that by site of your gauge -- or your ear ?
You know, we always called each other goodfellas. Like, you'd say to somebody: "You're gonna like this guy; he's all right. He's a goodfella. He's one of us." You understand? We were goodfellas, wiseguys.
[b]Team LL [/b] (2006 ~ And Beyond !! )
[b]Team LL [/b] (2006 ~ And Beyond !! )
Re: Big Motor questions
Holy crap a Delta Dan sighting
- JaJa Jigs - Get THUNKED
Links to Check Out -
https://www.instagram.com/jm_ash/
https://www.bestbasstournaments.com/
Links to Check Out -
https://www.instagram.com/jm_ash/
https://www.bestbasstournaments.com/
Re: Big Motor questions
Thanks all. Never replaced fuel lines. 100 hour service last year. Brand new tank of gas (one tank was empty). Thinking about it I think I did hear the engine running slightly different, but RPM gauge never changed. Water pressure was good.
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Re: Big Motor questions
Dude got same motor, had same problm twice. Once was spark plugs other time carbs needed cleaning.
Re: Big Motor questions
I had a 175 EFI was doing the same thing for about 3 months, did not think to much about it as it would always correct itself, untill about a quarter mile after blast off blew a piston, get it to a good mech and have him check it out lots of good advise on here but believe me that it can be very costly if you wait to long doing the trouble shooting yourself
Any day on the lake is a great day
Re: Big Motor questions
We have seen a lot of those engines need the lift pumps changed they wear out and will leak fuel by and cause the engine to surge.
Mike Van Wagner
Gone Fishin Marine
1880 N Lincoln St.
Dixon Ca. 95620
707-678-1600
Mike Van Wagner
Gone Fishin Marine
1880 N Lincoln St.
Dixon Ca. 95620
707-678-1600
Re: Big Motor questions
Was that at the HBC up at Clear Lake?chf8500 wrote:I had a 175 EFI was doing the same thing for about 3 months, did not think to much about it as it would always correct itself, untill about a quarter mile after blast off blew a piston, get it to a good mech and have him check it out lots of good advise on here but believe me that it can be very costly if you wait to long doing the trouble shooting yourself
Re: Big Motor questions
Just remembered to update this. Turns out two lift pumps were bad.
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Re: Big Motor questions
Same thing as mine..... I called Mike V.W.Kentuck wrote:Just remembered to update this. Turns out two lift pumps were bad.
Runs great now....
..................................................................
When in Doubt " Set the Hook"
When in Doubt " Set the Hook"
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Re: Big Motor questions
how old was the gas you let sit in your carbs? this ca fuel will cause issues if left sitting in your carbs. run some seafoam in the tank and see if that curses it.
Never argue with an idiot; He'll beat you to death with stupidity.
I AM NOT SAYING THERE SHOULD BE CAPITAL PUNISHMENT FOR STUPIDITY,
BUT, WHY DON'T WE JUST TAKE THE SAFETY LABELS OFF OF EVERYTHING
AND LET THE PROBLEM SOLVE ITSELF?"
I AM NOT SAYING THERE SHOULD BE CAPITAL PUNISHMENT FOR STUPIDITY,
BUT, WHY DON'T WE JUST TAKE THE SAFETY LABELS OFF OF EVERYTHING
AND LET THE PROBLEM SOLVE ITSELF?"
Re: Big Motor questions
I'd call Mike V.W.
He would know what to do.
He would know what to do.
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