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Originally Posted by SB
(Post 4637585)
How do you know your boat is 10mph slower than it should be if it hasn't run right since you've had it ?
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Originally Posted by SB
(Post 4637585)
How do you know your boat is 10mph slower than it should be if it hasn't run right since you've had it ?
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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 ? |
Originally Posted by SB
(Post 4637589)
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 ? Did you also do #3 ith shift interupter ? 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. |
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,. :) |
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. |
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 |
[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. |
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. |
So, you are getting around 12-13* advance from the module.
Do some searching, but I don't think these modules have 23-24 degrees in them. |
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