manifest irony
Recruit
- Joined
- Jun 29, 2011
- Messages
- 1
Hello all! First let me thank you in advance for any help; this forum has been invaluable to me in understanding these engines. My family has an old Bayliner with the 85HP Force/Chrysler 2 stroke engine. It has never worked correctly but we've managed to get her up in running before this year. I am pretty mechanically inclined and have read just about every thread and FAQ pertaining to this engine (and some others too). However, I'm left with a few questions.
First, the facts. I've checked the fuel pump and the diaphragm is definitely stretched out (no holes or tears though). Removed and cleaned each carb and visually inspected them. One carb's needle valve does not seat properly (float is not level when closed). The seat looks like it's installed backwards. So I'm planing on rebuilding this carb with a kit along with the fuel pump. Finally, I've checked the compression today and it's around 60psi on each cylinder, which I understand is low. I removed the head and checked the head gasket which is heavily corroded probably from salt water.
1. Could the head gasket be the cause of the low compression or is it likely to be the piston rings? The pistons themselves look ok other than some carbonization (no pitting or obvious defects apparent). Cylinder walls are smooth as well.
2. The main issue has been lack of a good idle along with frequent flooding. Once I've rebuilt the one carb, reinstalled all of them and "linked n synced" per the FAQ, will this solve the idling problem?
3. The timing advance arm under the flywheel was disconnected from the throttle linkage tower, which I reconnected and plan on adjusting with a timing light. Could this be a reason for the poor idle?
4. Am I overlooking anything?
5. Is any of these repairs worth it or should we scrap the thing? We don't have a lot of disposable income for a new boat/motor or repairs that won't fix the problem.
Any help is greatly appreciated; thanks!
First, the facts. I've checked the fuel pump and the diaphragm is definitely stretched out (no holes or tears though). Removed and cleaned each carb and visually inspected them. One carb's needle valve does not seat properly (float is not level when closed). The seat looks like it's installed backwards. So I'm planing on rebuilding this carb with a kit along with the fuel pump. Finally, I've checked the compression today and it's around 60psi on each cylinder, which I understand is low. I removed the head and checked the head gasket which is heavily corroded probably from salt water.
1. Could the head gasket be the cause of the low compression or is it likely to be the piston rings? The pistons themselves look ok other than some carbonization (no pitting or obvious defects apparent). Cylinder walls are smooth as well.
2. The main issue has been lack of a good idle along with frequent flooding. Once I've rebuilt the one carb, reinstalled all of them and "linked n synced" per the FAQ, will this solve the idling problem?
3. The timing advance arm under the flywheel was disconnected from the throttle linkage tower, which I reconnected and plan on adjusting with a timing light. Could this be a reason for the poor idle?
4. Am I overlooking anything?
5. Is any of these repairs worth it or should we scrap the thing? We don't have a lot of disposable income for a new boat/motor or repairs that won't fix the problem.
Any help is greatly appreciated; thanks!