Did another compression test today. Squirted 2 tbls spoons of engine oil into cylinder with low compression (only 30 psi). No improvement. Still only 30 psi.
Did a type of leak down test using plastic bags. (My hearing isn't what it used to be, so needed a visual to help identify where air may...
I did compression test again today after squirting 2 tbl spoons of engine oil into cylinder. No improvement.
Did another type of leak down test.
Brought bad cylinder (#5) to TDC. Loosened rockers to ensure valves weren't being compressed by rockers.
Put plastic bags over carburetor, exhaust...
Thanks for your response. I appreciate additional inputs and thoughts as I try to figure this out. Like you noted, it’s going to be harder to find once I tear it down, unless issue is obvious.
I run in saltwater. Saltwater runs through the heat exchanger and out the manifolds. Coolant in the...
I changed the exhaust manifolds and risers in May 2019.They may have been leaking before I changed them. I can’t remember if I found any water in the exhaust chamber. There was a lot of rust on the outside at the seam between the riser and manifold.
Right now, oil is good. No steam in exhaust...
What have others found as the reason for low compression following a leaky riser? What issues would a leaky riser cause? Valve problem? Ring problem? It depends?
Thanks in advance for any additional info,
1998 5.7, with 2 bbl carb, FWC
M048938
Thanks. I'll do the following...
hose the bores down with 30 wt oil or a smear of grease
spray WD40 in the water jacket
The plastic bags over the carb and exhaust pipe are for leak down test... to help identify where air is leaking.
During the first leak down test, I could hear the air in...
1998 Mercrusier 5.7L with 2 bbl carb. FWC.
M048938
720 hrs
Looking for advice. I am considering pulling the heads to have them refurbished during the offseason. (Reason why added below.) Boat will be outside under shrink wrap while heads are off.
I read that it is NOT recommended to drain...
Question about replacing the bearings on a jackshaft.
1986 Rampage 24 Express with 58" jackshaft
1998 Mercrusier 5.7
M048938
Looking for instructions on
1) replacing the bearing marked #17 in the attached (the one on the side of the jackshaft closest to the engine)
- Should it be pulled the...
1998 Evinrude 40 hp E40TLECR Outboard Motor
Turned key and starter engaged for 2 seconds and then the Starter solenoid started arcing. When I remove the red power to the starter and turn key, solenoid clicks.
I had removed starer to get to shift rod connector, to drop lower unit.
To remove...
Confirming hose locations on tilt/trim motor for install on new hoses. (I forgot to take a picture before removing old hoses.)
The (low pressure) black hose (up) is on left? And the (high pressure) gray (down) is on right?
I am all set with the hose locations on the manifold and rams.
Hearing a "chatter" near jackshaft / outdrive connection. But it is not a constant noise. Noise only occurs sporadically. "Chatter" noise occurs while in neutral at idle (~650 RPMs). Upper unit is new. U-Joints recently greased. Gimbal bearing checked July 2019 while outdrive was off. It seemed...
Is there a Rustoleum paint or other that will protect zinc plated bolts in a marine environment?
I messed up and used zinc plated bolts to secure the swim platform. Only the bolt heads are exposed but they are already showing signs of rust. If there’s nothing that will protect them, I’ll have...
Hi - I'm fixing a leaky port light. Have removed and will clean up surface before reinstalling. Before I reinstall, I am considering filling the existing screw holes with thickened epoxy and then drilling and tapping new holes before I screw the port light back in.
My question - If I fill the...
