1978 Merc 1500 Won’t Turn Over

bebeard · 06-02-08, 07:23 PM

Good day all,

I got my boat out for the first time this season on Friday and she spitted and sputtered, but I thought it could have been some stale gas. She ran pretty good Friday, slowly picking up speed as I was coming up and down the river.

Saturday morning, I got up from camp, and started up river for the day we she started acting up, and would die on me as if the motor was flooded, but would never stay running.

Once I got it home and started looking I found a blown fuel line. Coming from what I would think would be the fuel pump, but not sure. I replaced the line. Tried to start and she will not turn over….

Does anyone have any suggestions on what it could be or what I could try? How would I know if it’s a fuel pump? Plugs?

I have pictures of where I pulled the blown fuel line if you need them….

Thanks in advance,

Brook

1FASTLASER · 06-05-08, 06:03 AM

Ok bud are we talking about the V6 150 or the inline 6 150. Pics are worth a thousand words and I can be alot more specific for ya.

zooker · 06-05-08, 05:48 PM

belive that a 78 is a tower o power think the v-6 came out in the 80's..

zooker

boater · 06-07-08, 07:39 AM

should be a inline ,are you talking froze up won't turn over or low battery won't turn over?

bebeard · 06-08-08, 08:44 PM

no, it would try to start, but wouldn't never seem to fire.... I have put new plugs in, but still having trouble? Thanks for any support..

Would a clogged fuel filter, or air filter be the problem?

Thanks,

1FASTLASER · 06-11-08, 06:11 AM

Lemme dig those files out and I will send ya the ones I think ya need. Yes thats the trim pump.

1FASTLASER · 06-11-08, 06:13 AM

Also after you noticed the sputtering how was the motor running before she quit. Did it have a mis and was it actually shaking when idling. I need you to describe what the motor was doing after she started that sputtering and how was it running before it happened so I can be more specific.

bebeard · 06-11-08, 09:10 PM

Hello... thank you for getting me the info...

Well, I took her out on Sunday and she ran great for about 45 min to an hr. Was a slow start until the motor warmed up them crept up in speed and didn't do much sputtering. Then we where waiting for a friend to show up and when he did I fired it up... took off and she died! Wouldn't fire back up, would try to turn over but never fired.

I'm going to get a spark plug ignition checker tomorrow!

Thanks,

Brook

06-02-08, 07:23 PM	#1
bebeard BassFishin.Com Member Join Date: Jun 2007 Posts: 47	1978 Merc 1500 Won’t Turn Over Good day all, I got my boat out for the first time this season on Friday and she spitted and sputtered, but I thought it could have been some stale gas. She ran pretty good Friday, slowly picking up speed as I was coming up and down the river. Saturday morning, I got up from camp, and started up river for the day we she started acting up, and would die on me as if the motor was flooded, but would never stay running. Once I got it home and started looking I found a blown fuel line. Coming from what I would think would be the fuel pump, but not sure. I replaced the line. Tried to start and she will not turn over…. Does anyone have any suggestions on what it could be or what I could try? How would I know if it’s a fuel pump? Plugs? I have pictures of where I pulled the blown fuel line if you need them…. Thanks in advance, Brook

06-05-08, 06:03 AM	#2
1FASTLASER BassFishin.Com Super Veteran Join Date: Aug 2005 Location: crossett,arkansas Posts: 2,777	Ok bud are we talking about the V6 150 or the inline 6 150. Pics are worth a thousand words and I can be alot more specific for ya. __________________ Laser's rule with Merc's doing the pushing..........KEEP THE WETSIDE DOWN AND THE DRY SIDE UP!!!!!!

06-05-08, 05:48 PM	#3
zooker BassFishin.Com Premier Elite Join Date: Jan 2004 Location: denton nc Posts: 13,441	belive that a 78 is a tower o power think the v-6 came out in the 80's.. zooker __________________ the godfather.. aml in remission since 7-20-09

06-11-08, 06:11 AM	#6
1FASTLASER BassFishin.Com Super Veteran Join Date: Aug 2005 Location: crossett,arkansas Posts: 2,777	Lemme dig those files out and I will send ya the ones I think ya need. Yes thats the trim pump. __________________ Laser's rule with Merc's doing the pushing..........KEEP THE WETSIDE DOWN AND THE DRY SIDE UP!!!!!!

06-11-08, 06:13 AM	#7
1FASTLASER BassFishin.Com Super Veteran Join Date: Aug 2005 Location: crossett,arkansas Posts: 2,777	Also after you noticed the sputtering how was the motor running before she quit. Did it have a mis and was it actually shaking when idling. I need you to describe what the motor was doing after she started that sputtering and how was it running before it happened so I can be more specific. __________________ Laser's rule with Merc's doing the pushing..........KEEP THE WETSIDE DOWN AND THE DRY SIDE UP!!!!!!

06-07-08, 07:39 AM	#4
boater BassFishin.Com Active Member Join Date: May 2006 Location: O'Fallon Missouri Posts: 283	should be a inline ,are you talking froze up won't turn over or low battery won't turn over?

06-08-08, 08:44 PM	#5
bebeard BassFishin.Com Member Join Date: Jun 2007 Posts: 47	no, it would try to start, but wouldn't never seem to fire.... I have put new plugs in, but still having trouble? Thanks for any support.. Would a clogged fuel filter, or air filter be the problem? Thanks,

06-11-08, 09:10 PM	#8
bebeard BassFishin.Com Member Join Date: Jun 2007 Posts: 47	Hello... thank you for getting me the info... Well, I took her out on Sunday and she ran great for about 45 min to an hr. Was a slow start until the motor warmed up them crept up in speed and didn't do much sputtering. Then we where waiting for a friend to show up and when he did I fired it up... took off and she died! Wouldn't fire back up, would try to turn over but never fired. I'm going to get a spark plug ignition checker tomorrow! Thanks, Brook

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