force 120 plugs

[jimmi]

Help!!!!!!!<br />I have recently puchased a force 120 1991 modle can anyone tell me whats the best sparkplugs i can put in it and what compression it should have as here in Malta nobody has see this type of engine.

 

[ODDD1]

Re: force 120 plugs

jimmi, if the motor will spend alot of time at wide open throttle use a NGK BUHW....if it will spend alot of time idling with short bursts of WOT then use a gap plug NGK B9HS-10 with a .040" gap. compression....anything over 135 PSI is ok.

 

[jimmi]

Re: force 120 plugs

ODDD1 WHAT CAN I SAY THANKS ALOT!

 

[12Footer]

Re: force 120 plugs

LeBooke says,<br />Compression on >1990 Force 120 to Serial# OE93938;<br />145-165PSI<br />Force 120 serial no. OE93939 and up, Compression is STAGGERED. Cylinders 1 and 4, 135-150PSI.<br />Cylinders 2 and 3, 145-160PSI.<br />Recommended Plugs; Champion<br />120HP 1990-1991C, (Prestolite CD Ignition); UL18V. RFI plug,QL76V<br />120HP 1991D-1996, (Thunderbolt Ignition/CDM);<br />L76V, RFI plug is QL76V.<br /><br /><br />------------------<br />Time to change my tagline