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Volvo penta 5.7 v8 wont start.

R

Rpbjorn

New member
Daar marine fans,

I have ä problem starting a volvo penta.
The battery 2 x 12v 100ah are fully charged.
When turning the key you can hear the starter turning very slowing.
After a few Times trying the starter wont turn and is giving ä clicking sound.
After ä minute waiting and giving ä second try the start motor is just like the first time running very slowly.

Does somebody knows what the problen can be?
The battery are fully charged by ä remote charger.
 
The first thing to try is to disassemble and clean to shiny metal both sides of the electrical connections for the large wires at the batteries, the starter and, just as importantly, the ground on the engine block.

Dan
 
Tnx For your reply. I already sanded and cleaned the battery contact and wireclamps i also used contact spray. That was also not the solution :(


DJR said:
The first thing to try is to disassemble and clean to shiny metal both sides of the electrical connections for the large wires at the batteries, the starter and, just as importantly, the ground on the engine block.

Dan
Click to expand...
 
You do not mention the model of this Volvo Penta Engine.

If your Engine is not already equipped with one, I would suggest that you install a HTGR/PMGR starter motor.
(do not waste your money rebuilding a non-gear reduction starter motor)

Perhaps have the battery load tested.

Make sure that both Positive and Negative paths are good!
 
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Bend the cables end to end looking for weak spots also crank on the starter and feel the cables for heat. Sometimes the cables corrode under the insulation and if a cable gets hot it is either resistance or the starter is pulling too many amps. The start solenoid may have poor contacts also?
 
RicardoMarine said:
You do not mention the model of this Volvo Penta Engine.


If your Engine is not already equipped with one, I would suggest that you install a HTGR/PMGR starter motor.
(do not waste your money rebuilding a non-gear reduction starter motor)


Perhaps have the battery load tested.


Make sure that both Positive and Negative paths are good!
Click to expand...


Its's i think a Volvo Penta 5.7l v8 from 1987.
So i its not equipt with a luxury starter. But i dont want to spend a lot of money to fix it :p


kimcrwbr1 said:
Bend the cables end to end looking for weak spots also crank on the starter and feel the cables for heat. Sometimes the cables corrode under the insulation and if a cable gets hot it is either resistance or the starter is pulling too many amps. The start solenoid may have poor contacts also?
Click to expand...


Is there a way to test the wiring is there is any corrosion or weak spots? Or does the heat tells that? I dont think its the starter because somethimes it has not this problem
 
Rpbjorn said:
I think it's a Volvo Penta 5.7l v8 from 1987.
So i its not equipt with a luxury starter. But i dont want to spend a lot of money to fix it :p
Click to expand...

Your existing 1987 starter motor may be approaching 30 years old.
It is likely a non-gear reduction unit.
If it is beginning to fail, it may be part or all of your problem.

A new HTGR/PMGR unit is not expensive!!!!


.
 
re: "2x100 AH batteries". Unless both batteries are from the same manufacturer's lot and installed at the same time and ALWAYS connected in parallel, there is a fair possibility, that one battery is weaker than the other and is pulling down the good battery. Measure the voltage across the battery terminals AT the battery itself and if the voltage is less than 10.5 volts while the engine is attempting to crank, then batteries are the problem. ( either bad or not really charged). How old are the batteries? Are they marine? What duty, i.e. "start", "deep cycle" or "dual purpose" ???? Comments about benefits of new technology starters are right on.

BTW... the AH hour rating is not the definitive rating, CCA (Cold Cranking Amps) is.
 
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I agree, that's what i was going to suggest. Rpbjorn Place one lead of voltmeter on pos,battery post & other lead on+starter terminal and measure drop in voltage,anything more than.3 volts is to much,meaning possible bad cable.excessive heat on cable,ditto , How old are batteries? they need to be fully charged before these test are done. read previous threads again,good stuff up there! Is starter getting hot to touch,sign of defective starter and or solenoid. After trying to start engine a few times recheck battery voltage while cranking,reading below 10.5,battery issue, as sandkicker stated post#10.
 
64nova said:
remove the starter and have it rebuilt or install new one
Click to expand...
Again...... a 1987 starter motor (about 30 years old now) does not deserve to be over-hauled. For me, NON-Gear-Reduction is a deal breaker!
Replace it with one of today's HTGR/PMGR units, and don't look back! ;)

sandkicker said:
Comments about benefits of new technology starters are right on.

BTW... the AH hour rating is not the definitive rating, CCA (Cold Cranking Amps) is.
Click to expand...

Yes........ :D :D :D

.
 
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