2003 90 hp elpto,2nd post knocking noise

rsgonza

Seaman
Joined
Feb 18, 2002
Messages
72
I posted a thread here one week ago,thanks to all now I have the stalling and oil injection working but theres a noise,--------------------------------------------------------------------------------

well ok I went ahead and marked the oil tank and premixed fuel.then I took it out tuesday yesterday,the engine ran great,I also did a compression test 125psi all three cyl.now for some reason if I pull the plug wire while its running the middle cyl does not drop rpms like the top and bottom there is a change but mabye thats normal.anyway it appears the oil is being injected after i ran it two hours.[I know big chance I took} the noise did not get louder,it almost seemed like it got quiet at higher rpm's but then again the engine is loud.The stalling problem is gone I did take it up to 2500 rpm on plane once and it ran like it always has but it has a knock.and it does not change with me changing gears.The boat tech came by and well it stumped him.he checked rods for play none he check comp none he said he checked reed valves?ok either he not much of a boat tech,well he is my neighbor and has has a shop for 10 yrs so he should know something.I was thinking piston skirt slap?main bearings?I dont know I guess ill tear it down this winter.get this I bought the extended plan 5 years and the 5 yrs were up in march.aint that a B_tch.man I'm lost.no more stalling or dying and now my boats a mosqito killer.premix gas oil injection seems to be working anyone out there the engine is a 90 hp elpto thanks to all
 

hamit59

Petty Officer 2nd Class
Joined
Jul 25, 2008
Messages
149
Re: 2003 90 hp elpto,2nd post knocking noise

Did you do a spark test? 2 It has three carbs. It's either no spark or a fuel problem on #2 that means little or no lube on #2 leaning out on fuel could cause it too heat up. I hope it's a spark issue.
Could it be getting hot ??? Causing piston slap when was the last time you serviced the water pump ???

post back let us know what you find
 
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