Tryinboatin
Cadet
- Joined
- May 10, 2009
- Messages
- 17
Good Day All:
I'm new to boating and have found a tremendous resource here with all your expertise and am grateful to each who volunteers their time. But I found it a little too late.
I bought a $500 roadside special: 1975 Glastron tri-hull with an incredibly-clean 50 horsepower Johnson (50ESL75B). It was claimed a one-owner boat that hadn't been run for five years. I let it sit with Mystery Oil overnight, then got the flywheel moving with hands, then a wrench, and finally it would spin freely with the starter (plugs out). Every so often it would come to a harsh stop, but I didn't pay much attention to that. I put the plugs in and it ran for three seconds (wife was videotaping the big moment) and blew a hole in the side of the powerhead.
Not sure why it happened, but have found a wrist pin with no needle bearings, a cracked cylinder wall and a piston with needle bearings embedded perpendicular to the ring lands. I've since found a similar powerhead on a donor engine ($100), that turns over easily with the plugs in and will attempt to swap the parts over. And to think; a week ago, I didn't know what a powerhead was.
I'm a little reluctant to ask because I'm disappointed in myself, but does anyone have any advice or suggestion to what I did wrong? Thanks in advance.
I'm new to boating and have found a tremendous resource here with all your expertise and am grateful to each who volunteers their time. But I found it a little too late.
I bought a $500 roadside special: 1975 Glastron tri-hull with an incredibly-clean 50 horsepower Johnson (50ESL75B). It was claimed a one-owner boat that hadn't been run for five years. I let it sit with Mystery Oil overnight, then got the flywheel moving with hands, then a wrench, and finally it would spin freely with the starter (plugs out). Every so often it would come to a harsh stop, but I didn't pay much attention to that. I put the plugs in and it ran for three seconds (wife was videotaping the big moment) and blew a hole in the side of the powerhead.
Not sure why it happened, but have found a wrist pin with no needle bearings, a cracked cylinder wall and a piston with needle bearings embedded perpendicular to the ring lands. I've since found a similar powerhead on a donor engine ($100), that turns over easily with the plugs in and will attempt to swap the parts over. And to think; a week ago, I didn't know what a powerhead was.
I'm a little reluctant to ask because I'm disappointed in myself, but does anyone have any advice or suggestion to what I did wrong? Thanks in advance.
