kgsmeatman
Cadet
- Joined
- Jan 3, 2007
- Messages
- 11
1984 150 Evinrude Model # E150ANCRS
Motor is attached to Crestliner Nordic 21Ft
Before overhaul, motor pushed boat at 40mph
19 pitch prop
Heres how it runs right now on the water.
Starts and idols fine.
Throttle position from 1/2 or slighly over half to full there is not much to nothing there.
At wide open it only reaches 25 mph at 3200 rpm. Won't plane out.
Heres the short story and the million dollar question to a long drawn out saga to figure out why my 150 won't run right after it was comepletly overhauled over a year ago.
After several trips to the lake, and back to the shop with no difinitive answers, here is a list of the things that were checked or changed to try find a solution.
Carbs checked to determine position. ok
fuel;checked to determine delivery. ok
compression and leakdown, checked ok 85-90 psi
Electrical: checked coils,wires,CDI boxes,timing,everything even replaced the flywheel. electrical was checked for output on the water at full throttle by mechanic. checked ok but still lacked power at high end.
the shop tore the motor down a second time to check for internal errors. deemed ok.
as a last resort to increrease compression the shop shaved the heads 30 thousanths. Thats what it had to be Right? low compression?
Finaly gave the shop the ultimatum if they couldn't fix it I was taking it another shop.
took it to another shop, the guy looked in the sparkpug holes and told me the pistons were installed 180 degrees backwards. meaning the intake side of the domed piston (sharpside) was on the exhaust ( facing inward to the center) and the exhaust (gradually sloping)toward the outside. I concur i looked inside myself) Both sides are like this.
Heres the Question? Is this possible to install the pistons 180 degrees off without damage to the motor? ie Heads and pistons.
these pistons were looked at 3 times by the original overhaul shop without noticing this???????
ie 1. Original overhalul & assembly
2. Second teardown and assembly.
3. Head removal to shave .30 thousanths
i've been trying to do some research before I say too much and was told by another shop that this is not possible because the pistons would hit the heads if installed this way????
What do you guys say??? Who is right?
I've looked at the logs and can't find anything to this effect. Am i the only one that has gotten this lucky?
Any feedback appreciated!
Motor is attached to Crestliner Nordic 21Ft
Before overhaul, motor pushed boat at 40mph
19 pitch prop
Heres how it runs right now on the water.
Starts and idols fine.
Throttle position from 1/2 or slighly over half to full there is not much to nothing there.
At wide open it only reaches 25 mph at 3200 rpm. Won't plane out.
Heres the short story and the million dollar question to a long drawn out saga to figure out why my 150 won't run right after it was comepletly overhauled over a year ago.
After several trips to the lake, and back to the shop with no difinitive answers, here is a list of the things that were checked or changed to try find a solution.
Carbs checked to determine position. ok
fuel;checked to determine delivery. ok
compression and leakdown, checked ok 85-90 psi
Electrical: checked coils,wires,CDI boxes,timing,everything even replaced the flywheel. electrical was checked for output on the water at full throttle by mechanic. checked ok but still lacked power at high end.
the shop tore the motor down a second time to check for internal errors. deemed ok.
as a last resort to increrease compression the shop shaved the heads 30 thousanths. Thats what it had to be Right? low compression?
Finaly gave the shop the ultimatum if they couldn't fix it I was taking it another shop.
took it to another shop, the guy looked in the sparkpug holes and told me the pistons were installed 180 degrees backwards. meaning the intake side of the domed piston (sharpside) was on the exhaust ( facing inward to the center) and the exhaust (gradually sloping)toward the outside. I concur i looked inside myself) Both sides are like this.
Heres the Question? Is this possible to install the pistons 180 degrees off without damage to the motor? ie Heads and pistons.
these pistons were looked at 3 times by the original overhaul shop without noticing this???????
ie 1. Original overhalul & assembly
2. Second teardown and assembly.
3. Head removal to shave .30 thousanths
i've been trying to do some research before I say too much and was told by another shop that this is not possible because the pistons would hit the heads if installed this way????
What do you guys say??? Who is right?
I've looked at the logs and can't find anything to this effect. Am i the only one that has gotten this lucky?
Any feedback appreciated!
