sweetwater
New member
" Needing some info...
Late 8
" Needing some info...
Late 80's model 70 hp Johnson, that cranks and runs good. When first got the boat the previous owner stated that it began to cut-out at full throttle. I began to check it out. This engine is equiped with a rev limiter. I disconnected it for troubleshooting and it stopped cutting out. But I don't have a tach for a 3cyl, nor do I know what the max rpm setting is. So I backed the max out so the control would not go so far and it would not set off the rev limiter. First of the season it went into the shop for this and other things. The shop backed off the setting I made so it made max rpm but didn't run it long enough to set off rev limiter. My rambling ceases here!!!
What should be max rpm on 1988-89 70hp Johnson?
What other conditions could trigger rev limiter or some other feature to shut down a cylinder?
Can an automotive tach set for 6 cyl be used by dividing reading by 2 (if scale is high enough)?
If so, how do you place an automotive tach in this ignition system?
I just found this board today. Great info!!
Thanks,
Sweetwater (24ft poontoon) "
Late 8
" Needing some info...
Late 80's model 70 hp Johnson, that cranks and runs good. When first got the boat the previous owner stated that it began to cut-out at full throttle. I began to check it out. This engine is equiped with a rev limiter. I disconnected it for troubleshooting and it stopped cutting out. But I don't have a tach for a 3cyl, nor do I know what the max rpm setting is. So I backed the max out so the control would not go so far and it would not set off the rev limiter. First of the season it went into the shop for this and other things. The shop backed off the setting I made so it made max rpm but didn't run it long enough to set off rev limiter. My rambling ceases here!!!
What should be max rpm on 1988-89 70hp Johnson?
What other conditions could trigger rev limiter or some other feature to shut down a cylinder?
Can an automotive tach set for 6 cyl be used by dividing reading by 2 (if scale is high enough)?
If so, how do you place an automotive tach in this ignition system?
I just found this board today. Great info!!
Thanks,
Sweetwater (24ft poontoon) "