smithsmarina@gmail.com
Cadet
- Joined
- May 4, 2006
- Messages
- 22
Engine: Force 50<br />Year: 1987<br />Model: 507X7C<br />Serial: 1251<br /><br />Given Variables:<br />1.) the water pump assembly was new<br />2.) engine ran normal @ start of last season in all throttle positions<br />3.) all foot seals were replaced when i got engine<br />4.) engine did not smoke at all<br />5.) premium 50:1 (or greater) mix was used <br /><br />Actions taken:<br />1.) engine was decarbed folling instructions<br /><br />Results of last summer:<br />1.) engine had more power for a month, but smoked a little<br />2.) then engine reverted to "pre decarbing" condition<br />3.) then engine continued to get worse, loosing power<br />4.) by mid season engine would drop to idle from FOT<br />5.) lower plug was being fouled (black, burnt)<br />6.) replacing lower plug fixed prob for 2 weeks<br />7.) by end of season engine wont exceed 20% throt<br />8.) lower plug would be fouled almost instatly and engine ran rough<br />9.) upper plug was always fine<br /><br />Looking at engine now:<br />1.) thermostat housing was leaking salt crystals<br />2.) thermostat was corroded and clogged w/ debris<br />3.) pouring cup of water in t-stat hole yeilds water and oil from lower exhaust port<br /><br /><br />I got this engine/boat last winter. I changed the impeller and it spat out water so i used it. Never did the engine not spit water, but sometimes it would take a few minutes to come out. The symtoms described above came to pass over a 6 week time period. The final result is that the boat "conks out" if i push it it past 20% throttle. I have read every post on this forum about force 50 outboards and have a seloc manual. I am familar with the systems but need an algorythem of things to check/replace.<br /><br />People have told me to change the coils, but i cannot find ones for my model/year that look like the ones i have (not saying i know that is the problem) This is my first boat. ~gratis<br /><br />Chris @ Smith's Marina
