"Hi, Currently got engine out
"Hi, Currently got engine out of boat I am restoring, and just done compression test on it. Results are as follows on a mid-late 70s 3l 4cyl 130hp for which specs says compression should be 140PSI:
1) 130
2) 113
3) 122
4) 118
I then put a bit of oil into the cylinders (about 10ml), and retested, got the following results:
1) 140
2) 113
3) 128
4) 126
So def somthing odd with cyl 2! I suspect that its valves, actually I presume that 2,3, and 4 need valves grinding as they are so much lower than one even with oil in cylinder, although that helped at bit.
I only had the engine briefly idle (roughly) when I got it, before I then removed it as it had other problems (broken fuel pump etc). The boat had sat for a few years unused prior to me getting it.
I am debating whether to do any further work on engine before putting it back in, as I really just want to get the boat finished and go use it for this summer, and maybe pull the engine and do valve job and maybe rings over next winter.
Based on those results do you think its worth putting the engine back in and seeing how it goes, or is that a dream and its obvious that it needs some major work on it now and so dont waste time refitting it only to have to remove it straight away when it doesnt run very well?
At the end of the day its only supposed to be a cheap propject boat (since when did those two words go together?!?
), so I am not bothered about having it factory spec, just reliable and useable.
Many thanks,
Anthony"
"Hi, Currently got engine out of boat I am restoring, and just done compression test on it. Results are as follows on a mid-late 70s 3l 4cyl 130hp for which specs says compression should be 140PSI:
1) 130
2) 113
3) 122
4) 118
I then put a bit of oil into the cylinders (about 10ml), and retested, got the following results:
1) 140
2) 113
3) 128
4) 126
So def somthing odd with cyl 2! I suspect that its valves, actually I presume that 2,3, and 4 need valves grinding as they are so much lower than one even with oil in cylinder, although that helped at bit.
I only had the engine briefly idle (roughly) when I got it, before I then removed it as it had other problems (broken fuel pump etc). The boat had sat for a few years unused prior to me getting it.
I am debating whether to do any further work on engine before putting it back in, as I really just want to get the boat finished and go use it for this summer, and maybe pull the engine and do valve job and maybe rings over next winter.
Based on those results do you think its worth putting the engine back in and seeing how it goes, or is that a dream and its obvious that it needs some major work on it now and so dont waste time refitting it only to have to remove it straight away when it doesnt run very well?
At the end of the day its only supposed to be a cheap propject boat (since when did those two words go together?!?
Many thanks,
Anthony"