Mercruiser 496 crank no start
#12
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GRAb a free loaner fuel psi tester from Autozone on your way home too.
#13
Ok so I tested the fuel pressure and it was 40 psi while cranking and I swapped the relays on the top of the engine and it still won't start. I call a local service center near me to get it scanned but the soonest they can get me in is in two months. Any other suggestions?
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SB (06-02-2021)
#15
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Where are you located?
#17
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Ok so I tested the fuel pressure and it was 40 psi while cranking and I swapped the relays on the top of the engine and it still won't start. I call a local service center near me to get it scanned but the soonest they can get me in is in two months. Any other suggestions?
No spark though. So, lets look into this. Sorry for basic question but have to ssk - how did you check ?
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SB (06-02-2021)
#19
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I don't know the ins and outs of the 496 ECM but I know there's a crankshaft sensor and a camshaft sensor. Wouldn't surprise me to find out crank sensor measures RPM and cam sensor controls ignition.
On a side note, there are a few different types of both sensors so make sure you get the one for your eng serial number if replacing.
On a side note, there are a few different types of both sensors so make sure you get the one for your eng serial number if replacing.
#20
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