Hi All,
This has been an intermittent problem for almost a year now?and its driving me crazy:mad-new:
I have a 1995 Evinrude 90 Hp (E90TLEOR) 2-stroke, powering a Lund Fisherman 1800. I rebuilt the engine in 2010 after my VR02 oil pump and alarm buzzer failed (newbie).
Here are the symptoms: After running on plane for ~30 minutes, the engine bogs down and will not go over ~3,000 RPM. No buzzers/alarms sound. All operation under ~3000 RPM seems normal. Once it happens, it stays that way until I take it out the next time and I have a ~50% chance that it repeats.
I took the boat out 4 times earlier this season for extended day use with no issues at all. Last week it bogged down and when I got home I check the spark plugs which looked evenly gummed up 'wet', not dry at all.
This is what I've done over the past year to ?fix? this problem through visits to mechanics and a lot of DIY:
? Drained the fuel tank
? Removed and inspected the fuel tank pick-up ? looks fine
? Replaced the fuel lines from tank to engine
? Added a Sierra fuel/water separator (I use Star Tron enzyme treatment religiously)
? Ran a can of Sea Foam in the 26 gallon tank with premium fuel
? Mechanic ?cleaned? carbs
? Replaced the on-board engine fuel filter
? Replaced VR02 fuel/oil pump with single stage fuel pump (I premix anyways)
? Checked compression ? all good and within +/- 5psi
? Purchased a 3 gallon auxiliary fuel tank and switched over when engine bogged down. After 1.5 gallons of fresh
premium fuel was used up, still no change (not a ?bad gas? problem)
? Checked for spark while under load and engine bogging down, it was sparking, but I?m not sure how to tell if it was
good or bad.
? The Power coil and Sensor coil both pass a static resistance test. I plan on conducting a dynamic test on each
(and the ignition coils) over the weekend if it bogs down.
I've been thinking that this is a fuel delivery issue all along, but now I?m convinced it is a power coil, sensor coil, ignition coil or power pack problem. The consistent 30 minutes of flawless operation prior to bogging down sounds like something is slowly heating up and possibly shorting. Along with the ?wet? plugs it seems to point to an electrical problem.
Anything logical that I?m missing?
Thanks for your help!
This has been an intermittent problem for almost a year now?and its driving me crazy:mad-new:
I have a 1995 Evinrude 90 Hp (E90TLEOR) 2-stroke, powering a Lund Fisherman 1800. I rebuilt the engine in 2010 after my VR02 oil pump and alarm buzzer failed (newbie).
Here are the symptoms: After running on plane for ~30 minutes, the engine bogs down and will not go over ~3,000 RPM. No buzzers/alarms sound. All operation under ~3000 RPM seems normal. Once it happens, it stays that way until I take it out the next time and I have a ~50% chance that it repeats.
I took the boat out 4 times earlier this season for extended day use with no issues at all. Last week it bogged down and when I got home I check the spark plugs which looked evenly gummed up 'wet', not dry at all.
This is what I've done over the past year to ?fix? this problem through visits to mechanics and a lot of DIY:
? Drained the fuel tank
? Removed and inspected the fuel tank pick-up ? looks fine
? Replaced the fuel lines from tank to engine
? Added a Sierra fuel/water separator (I use Star Tron enzyme treatment religiously)
? Ran a can of Sea Foam in the 26 gallon tank with premium fuel
? Mechanic ?cleaned? carbs
? Replaced the on-board engine fuel filter
? Replaced VR02 fuel/oil pump with single stage fuel pump (I premix anyways)
? Checked compression ? all good and within +/- 5psi
? Purchased a 3 gallon auxiliary fuel tank and switched over when engine bogged down. After 1.5 gallons of fresh
premium fuel was used up, still no change (not a ?bad gas? problem)
? Checked for spark while under load and engine bogging down, it was sparking, but I?m not sure how to tell if it was
good or bad.
? The Power coil and Sensor coil both pass a static resistance test. I plan on conducting a dynamic test on each
(and the ignition coils) over the weekend if it bogs down.
I've been thinking that this is a fuel delivery issue all along, but now I?m convinced it is a power coil, sensor coil, ignition coil or power pack problem. The consistent 30 minutes of flawless operation prior to bogging down sounds like something is slowly heating up and possibly shorting. Along with the ?wet? plugs it seems to point to an electrical problem.
Anything logical that I?m missing?
Thanks for your help!