Full Version: force 150 compression test results
i found a force 150 hp outboard. the compression test is as follows: #1 - 120, #2 - 150, #3 - 150, #4 - 140, #5 - 100 im a bit concerned about #1 and #5 . what do you guys think. the motor is a 1990 and the cost is $1200.
if it was a sled would you consider the compression reliable?
I wouldn't... too many holes, too far apart.
force motor's are shit from the box IMO and they don't have the performance of competitors when new...
I wouldn't... too many holes, too far apart.
force motor's are shit from the box IMO and they don't have the performance of competitors when new...
I'm more of a boat motor guy than anything else so ill tell you what i know. a general rule of thumb for 2 strokes is that compression numbers should be within 10% of each other, 15% max. 100 is low considering the rest. Before you buy ask for a de-carb with sea-foam and see if it raises compression. If not, avoid it...Forces came from the factory with high compression numbers, i believe a 150 was around 150-160 stock compression. What has me concerned is that three of the five are good, 1 is o.k., and the 5th is not so good. Like i said, its not so much the numbers that matter, its the percent.
Force motors were intended for new boaters wanting to get onto the lake for a cheap price. Therefore, these motors gained a horrible reputation since most were not properly maintained and suffered from this greatly. Not to mention the earlier forces(pre-mercury) had horrible ignition and charging systems, no thru-hub exhaust, weak lower units, and other cheap parts that often failed without proper maintenance. The 150 forces in particular were one of the biggest POS they ever made. #1 and #5 cyl were always known to go and they made about 120-130 h.p on a good day. It was a very, very overrated 150.
Conclusion: Stay away from this motor IMO.
Force motors were intended for new boaters wanting to get onto the lake for a cheap price. Therefore, these motors gained a horrible reputation since most were not properly maintained and suffered from this greatly. Not to mention the earlier forces(pre-mercury) had horrible ignition and charging systems, no thru-hub exhaust, weak lower units, and other cheap parts that often failed without proper maintenance. The 150 forces in particular were one of the biggest POS they ever made. #1 and #5 cyl were always known to go and they made about 120-130 h.p on a good day. It was a very, very overrated 150.
Conclusion: Stay away from this motor IMO.
QUOTE(91_indy500sp @ May 29 2007, 11:27 PM) 
I'm more of a boat motor guy than anything else so ill tell you what i know. a general rule of thumb for 2 strokes is that compression numbers should be within 10% of each other, 15% max. 100 is low considering the rest. Before you buy ask for a de-carb with sea-foam and see if it raises compression. If not, avoid it...Forces came from the factory with high compression numbers, i believe a 150 was around 150-160 stock compression. What has me concerned is that three of the five are good, 1 is o.k., and the 5th is not so good. Like i said, its not so much the numbers that matter, its the percent.
Force motors were intended for new boaters wanting to get onto the lake for a cheap price. Therefore, these motors gained a horrible reputation since most were not properly maintained and suffered from this greatly. Not to mention the earlier forces(pre-mercury) had horrible ignition and charging systems, no thru-hub exhaust, weak lower units, and other cheap parts that often failed without proper maintenance. The 150 forces in particular were one of the biggest POS they ever made. #1 and #5 cyl were always known to go and they made about 120-130 h.p on a good day. It was a very, very overrated 150.
Conclusion: Stay away from this motor IMO.
Force motors were intended for new boaters wanting to get onto the lake for a cheap price. Therefore, these motors gained a horrible reputation since most were not properly maintained and suffered from this greatly. Not to mention the earlier forces(pre-mercury) had horrible ignition and charging systems, no thru-hub exhaust, weak lower units, and other cheap parts that often failed without proper maintenance. The 150 forces in particular were one of the biggest POS they ever made. #1 and #5 cyl were always known to go and they made about 120-130 h.p on a good day. It was a very, very overrated 150.
Conclusion: Stay away from this motor IMO.
Excellent reply young man.
QUOTE(jammin @ May 30 2007, 12:00 PM)
Excellent reply young man.
Ditto, also no oil injection and can't find parts
i actually ended up buying it for 800. ran great all year and drove the boat much better than the 120. i figured what the heck, worse case senario is to use it for parts and between the 2 of them - i would have one complete one...im very happy with the purchase....see you on the water come spring time.
QUOTE(glennrow @ Jan 30 2008, 01:56 PM)
i actually ended up buying it for 800. ran great all year and drove the boat much better than the 120. i figured what the heck, worse case senario is to use it for parts and between the 2 of them - i would have one complete one...im very happy with the purchase....see you on the water come spring time.
Glen don't forget I stock Force parts.
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