Out on the lake today w/ 98 srx 700 w/ 4500 miles well maintained carbs & powervalves cleaned ect . She was running Great noticed power loss wouldn't rev past 7000 rpm sounded like it was loosing spark noticed a bubbling noise, so I pulled over I thought a plug wire fell off, all looked good pulled the plugs ( mag) plug looked blackish like carbon (ctr) nice bronze color (pto) carbon grayish,looked inside the plug hole no meltdown or holes in the pistons,started her up wouldn't Idle had to keep on the throtle , took it slow & got her back to the house & did a compression test (mag plug) was about 45psi (ctr) 125psi (pto) 115 psi . Has anyone had this problem. I know It was cold today, Possably ran lean ? but why not the (ctr) cyl ? poss both mag & pto seals at the same time? could it be the power valves in these cyls?or reed valves broke? Any help on where to start the diagnosis would be apriciated.
Piston is no dought gone.
daman
New member
tear her down.
Unfortunately I recognize those symtomns all too well and your looking at a piston and ring job on one cylinder and at least rings on the other 2.
daman
New member
How's your coming??fourbarrel said:
What do you think would cause this to happen??
Checked oil pump free play 20 to 21 mm ok , pulled the air cleaner screan & noticed cold air holes were not covered poss ran lean? I filled up w/ 93 pre fuel I did add a few oz iso dryer to the tank ? any referals in chicagoland area?
Got a crank coming by Wed or Thurs hopefully and figure on the engine being in the sled running Friday.daman said:
daman
New member
Good,keep us posted....fourbarrel said: