95 90HP SeaRayder Cyl #1 Intermittent Firing

mjfein

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Jun 17, 2004
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On a ‘95 90HP Sea Rayder Serial # E 101689 with bullet type connectors, Cyl #1 will quit, dropping speed from about 36 to 24. #1 will remain dead for 5, 10 or some more minutes then start firing again. When at 24 speed, we can remove plug #1 wire and speed maintained. #1 & #2 plugs, wires, coils have been interchanged and problem remains #1 cyl. We suspect switchbox or trigger but neither Clymer nor postings tell us how to narrow problem to either trigger or to switchbox. Clymer states one high speed charge coil charges cap in switch box so that must be working since #2 and #3 firing OK. Clymer also says there are three trigger coils so the trigger coil for #1 may have occasional problems. But it appears the switch box also has to deliver the high voltage to the correct coil/plug combination at the correct point in the firing cycle so it also could be the problem for cyl #1. Compression about equal in all cylinders. Fuel system rebuilt with no improvement. Are there tests to decide between trigger and switch box? Suggestions most appreciated. :confused:
 

JB

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Mar 25, 2001
Messages
45,907
Re: 95 90HP SeaRayder Cyl #1 Intermittent Firing

Sea Rayder does not make engines, MJFein.<br /><br />Tell us about your engine. What make? What Model?
 

mjfein

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Joined
Jun 17, 2004
Messages
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Re: 95 90HP SeaRayder Cyl #1 Intermittent Firing

JB -<br /><br />The serial # I gave is the Merc engine serial # although what I read on postings indicates engine was actually built by Force. So all I can say for certain is that it's labeled Merc. Model is <br />H090J01RD per Merc web site. Engine is powering<br />90HP 95 Sea Rayder Jet Boat.
 
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