weird timing symptoms
07-13-2018 | 10:54 PM
#11
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Because it is a very common boat and there are loads of people online who clearly said it should get at least 40mph. I saw videos too showing different exact same boats performing (including seeing the rpm range and speedo) and clearly I am missing. All within roughly the same range that I am not getting. I am missing rpms plus speed.
07-13-2018 | 10:58 PM
#12
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I honestly don't even care if I get my current 30 mph vs 40mph, I just want to ensure I am not damaging the engine at the lower rpms. I only get 3900 to 4000 rpm. The WOT for this engine is 4600-4800. Is this an issue with how it is running? Also, I want to ensure that I have enough get up and go to get out of the hole easily pulling people out of the water.
07-13-2018 | 11:04 PM
#13
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From: On A Dirt Floor
Make sure the gear ratio in the outdrive is correct and the prop is correct.
Back to timing: althouh I have never done it, do you follow merc's timing procedure for the 3.0 ?
http://www.boatfix.com/merc/bullet/90/90_15.pdf
Did you also do #3 ith shift interupter ?
Back to timing: althouh I have never done it, do you follow merc's timing procedure for the 3.0 ?
http://www.boatfix.com/merc/bullet/90/90_15.pdf
Did you also do #3 ith shift interupter ?
07-13-2018 | 11:11 PM
#14
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I do follow exact procedures but when i take it off base mode, it still doesn't advance to the required 12 +- 2degrees at idle. It just stays at 0.
07-13-2018 | 11:16 PM
#15
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I do know the advance jumped to full advance very quickly off idle. Maybe your idle is a bit high, at full advance, which you set at 0*.
I've seen stranger schit !
Beg or borroq a total timing light or install timing tape for the balancer.
Sorry for weird typos. Lying on couch ith lights off, other than TV, I need one of hose lighted keyboard deals,.
I've seen stranger schit !
Beg or borroq a total timing light or install timing tape for the balancer.
Sorry for weird typos. Lying on couch ith lights off, other than TV, I need one of hose lighted keyboard deals,.
07-13-2018 | 11:59 PM
#16
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From: Ft. Worth TX
the 3.0 marine engine from the 90 s to early 2000 s had issues with the cam gear keyway slot wollowing out. Especially in the 90 s ----- and your engine serial number is from 90 s.
I have not read any of the posts except the header.
Merc had 2 different ignition set ups in the 90 s for the 3.0 L -- are YOU SURE YOU HAVE EST IGNITION SET UP HERE ? Just asking.
There is a Service bulletin on timing should be thru Merc and Volvo has one as well. It might be 1 ATDC if I recall. I would have to look it up.
I have not read any of the posts except the header.
Merc had 2 different ignition set ups in the 90 s for the 3.0 L -- are YOU SURE YOU HAVE EST IGNITION SET UP HERE ? Just asking.
There is a Service bulletin on timing should be thru Merc and Volvo has one as well. It might be 1 ATDC if I recall. I would have to look it up.
07-14-2018 | 12:10 AM
#17
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From: Ft. Worth TX
Well I was CORRECT about the 1 ATDC --- man I still have a really good memory. But the service bulletin list does not fall under your serial number. If recall correctly --- I think possible we even back dated / back serial number with the 3.0 L to the 1 ATDC so the owner did not have detonation issues with the newer gas blends at the pump. E 10 is a leaner mixture fuel was my point back then. We had E 10 for a long time in the area and before that M 5 fuels.
I would have to run your engine serial number to remember or look at the which service manual covers your 3.0 L Merc to be 100 percent sure about the timing Anyways the Service bulletin for a couple years later than yours is in the link below.
http://www.boatfix.com/merc/bullet/98/98_14.PDF
I would have to run your engine serial number to remember or look at the which service manual covers your 3.0 L Merc to be 100 percent sure about the timing Anyways the Service bulletin for a couple years later than yours is in the link below.
http://www.boatfix.com/merc/bullet/98/98_14.PDF
Last edited by BUP; 07-14-2018 at 12:18 AM.
07-14-2018 | 12:37 AM
#18
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[QUOTE=BUP;4637597]Well I was CORRECT about the 1 ATDC --- man I still have a really good memory. But the service bulletin list does not fall under your serial number. If recall correctly --- I think possible we even back dated / back serial number with the 3.0 L to the 1 ATDC so the owner did not have detonation issues with the newer gas blends at the pump. E 10 is a leaner mixture fuel was my point back then. We had E 10 for a long time in the area and before that M 5 fuels.
I would have to run your engine serial number to remember or look at the which service manual covers your 3.0 L Merc to be 100 percent sure about the timing Anyways the Service bulletin for a couple years later than yours is in the link below.
QUOTE]
i have est for sure. Also vacuum gauge reads steady so no symptoms of anything.
I would have to run your engine serial number to remember or look at the which service manual covers your 3.0 L Merc to be 100 percent sure about the timing Anyways the Service bulletin for a couple years later than yours is in the link below.
QUOTE]
i have est for sure. Also vacuum gauge reads steady so no symptoms of anything.
07-14-2018 | 11:25 AM
#19
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Doesn’t leave base timing mode
i verified that timing in base is 1 btdc. Idle at 500 rpm.
When I removed the shift wires then removed jumper nothing changed. At 2500 rpm timing show about 12 btdc.
I tried several times and seems to stay in base. I can get about 3900-4000 rpm max on water.
When I removed the shift wires then removed jumper nothing changed. At 2500 rpm timing show about 12 btdc.
I tried several times and seems to stay in base. I can get about 3900-4000 rpm max on water.
